Toyota Corolla Cross: Lost Communication with Drive Motor Control Module "A" (U011000,U111A87,U115087,U115487,U115887,U117008,U117087)

Toyota Corolla Cross (2022-2024) Service Manual / Power Source & Network / Networking / Can Communication System (for Hev Model) / Lost Communication with Drive Motor Control Module "A" (U011000,U111A87,U115087,U115487,U115887,U117008,U117087)

DESCRIPTION

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
U011000	Lost Communication with Drive Motor Control Module "A"	Communication stops between the electric brake booster (brake booster with master cylinder assembly) and the hybrid motor control inverter assembly.	CAN main/branch bus lines or connector Electric brake booster (brake booster with master cylinder assembly) Hybrid motor control inverter assembly No. 2 CAN junction connector No. 9 Global CAN junction connector	DTC Output from Electric brake booster (brake booster with master cylinder assembly)
U111A87	Lost Communication with ECM/PCM "A" (ch2) Missing Message	Communication stops between the hybrid vehicle control ECU and the ECM.	CAN main/branch bus lines or connector Hybrid vehicle control ECU ECM No. 2 CAN junction connector No. 9 Global CAN junction connector	DTC Output from Hybrid vehicle control ECU
U115087	Lost Communication with Hybrid Powertrain Control Module (ch2) Missing Message	Communication stops between the ECM or skid control ECU (brake actuator assembly) and the hybrid vehicle control ECU.	CAN main/branch bus lines or connector ECM Skid control ECU (brake actuator assembly) Hybrid vehicle control ECU No. 2 CAN junction connector No. 9 Global CAN junction connector	DTC Output from ECM Skid control ECU (brake actuator assembly)
U115487	Lost Communication with Drive Motor Control Module "A" (ch2) Missing Message	Communication stops between the ECM or hybrid vehicle control ECU and the hybrid motor control inverter assembly.	CAN main/branch bus lines or connector ECM Hybrid vehicle control ECU Hybrid motor control inverter assembly No. 2 CAN junction connector No. 9 Global CAN junction connector	DTC Output from ECM Hybrid vehicle control ECU
U115887	Lost Communication with Electronic Brake Booster Control Module "A" (ch2) Missing Message	Communication stops between the electric brake booster (brake booster with master cylinder assembly) and the skid control ECU (brake actuator assembly).	CAN main/branch bus lines or connector Electric brake booster (brake booster with master cylinder assembly) Skid control ECU (brake actuator assembly) No. 2 CAN junction connector No. 9 Global CAN junction connector	DTC Output from Electric brake booster (brake booster with master cylinder assembly)
U117008	Lost Communication with Brake System Control Module (ch2) Bus Signal / Message Failure	Communication stops between the hybrid motor control inverter assembly and the skid control ECU (brake actuator assembly).	CAN main/branch bus lines or connector Hybrid motor control inverter assembly Skid control ECU (brake actuator assembly) No. 2 CAN junction connector No. 9 Global CAN junction connector	DTC Output from Hybrid motor control inverter assembly
U117087	Lost Communication with Brake System Control Module (ch2) Missing Message	Communication stops between the hybrid vehicle control ECU or electric brake booster (brake booster with master cylinder assembly) and the skid control ECU (brake actuator assembly).	CAN main/branch bus lines or connector Hybrid vehicle control ECU Electric brake booster (brake booster with master cylinder assembly) Skid control ECU (brake actuator assembly) No. 2 CAN junction connector No. 9 Global CAN junction connector	DTC Output from Hybrid vehicle control ECU Electric brake booster (brake booster with master cylinder assembly)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
- Inspecting the high-voltage system
- Disconnecting the low voltage connector of the hybrid motor control inverter assembly
- Disconnecting the low voltage connector of the HV battery
To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the hybrid motor control inverter assembly. The voltage should be 0 V before beginning work.
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HINT:

Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the hybrid motor control inverter assembly.

*a

Without waiting for 10 minutes

NOTICE:

Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.
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Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
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When disconnecting and reconnecting the auxiliary battery.
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here
Some parts must be initialized and set when replacing or removing and installing parts.
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After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
DTC check procedure: Turn the ignition switch to ON and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.
After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.
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Before replacing the hybrid vehicle control ECU, refer to Registration.
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HINT:

Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

PROCEDURE

1.	CHECK FOR OPEN IN CAN MAIN BUS LINES

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Measure the resistance according to the value(s) in the table below.

Component with harness connected

(Hybrid Vehicle Control ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I249-50 (CA3P) - I249-49 (CA3N)	Cable disconnected from negative (-) auxiliary battery terminal	Below 70 Ω

GO TO STEP 41

2.	CHECK FOR SHORT IN CAN BUS LINES

(a) Measure the resistance according to the value(s) in the table below.

Component with harness connected

(Hybrid Vehicle Control ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I249-50 (CA3P) - I3249-49 (CA3N)	Cable disconnected from negative (-) auxiliary battery terminal	54 Ω or higher

GO TO STEP 29

3.	CHECK FOR SHORT TO +B IN CAN BUS LINE

(a) Measure the resistance according to the value(s) in the table below.

Component with harness connected

(Hybrid Vehicle Control ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I249-50 (CA3P) - I249-13 (BATT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
I249-49 (CA3N) - I249-13 (BATT)		6 kΩ or higher

GO TO STEP 17

4.	CHECK FOR SHORT TO GND IN CAN BUS LINE

(a) Measure the resistance according to the value(s) in the table below.

Component with harness connected

(Hybrid Vehicle Control ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I249-50 (CA3P) - A192-24 (E12)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
I249-49 (CA3N) - A192-24 (E12)		200 Ω or higher

INSPECT FOR INTERMITTENT PROBLEMS

5.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)

(a) Disconnect the No. 9 CAN junction connector.

(b) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 9 Global CAN Junction Connector)

to Hybrid Vehicle Control ECU

Standard Resistance:

Tester Connection	Condition	Specified Condition
A193-2 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
A193-13 (CANL) - I26-4 (CG)		200 Ω or higher

GO TO STEP 8

6.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION CONNECTOR)

(a) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 9 Global CAN Junction Connector)

to No. 2 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
A193-3 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
A193-14 (CANL) - I26-4 (CG)		200 Ω or higher

GO TO STEP 10

7.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY))

(a) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 9 Global CAN Junction Connector)

to Electric Brake Booster (Brake Booster with Master Cylinder Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A193-1 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
A193-12 (CANL) - I26-4 (CG)		200 Ω or higher

REPLACE NO. 9 GLOBAL CAN JUNCTION CONNECTOR

GO TO STEP 9

8.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)

(a) Disconnect the I249 hybrid vehicle control ECU connector.

(b) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 9 Global CAN Junction Connector)

to Hybrid Vehicle Control ECU

Standard Resistance:

Tester Connection	Condition	Specified Condition
A193-2 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
A193-13 (CANL) - I26-4 (CG)		200 Ω or higher

REPLACE HYBRID VEHICLE CONTROL ECU

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)

9.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY))

(a) Disconnect the A189 electric brake booster (brake booster with master cylinder assembly) connector.

(b) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 9 Global CAN Junction Connector)

to Electric Brake Booster (Brake Booster with Master Cylinder Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A193-1 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
A193-12 (CANL) - I26-4 (CG)		200 Ω or higher

REPLACE ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY))

10.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR - NO. 9 GLOBAL CAN JUNCTION CONNECTOR)

(a) Disconnect the No. 2 CAN junction connector.

(b) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to No. 9 Global CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-4 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
A194-8 (CANL) - I26-4 (CG)		200 Ω or higher

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - NO. 9 GLOBAL CAN JUNCTION CONNECTOR)

11.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR - HYBRID MOTOR CONTROL INVERTER ASSEMBLY)

(a) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to Hybrid Motor Control Inverter Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-1 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
A194-5 (CANL) - I26-4 (CG)		200 Ω or higher

GO TO STEP 14

12.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR - ECM)

(a) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to ECM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-3 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
A194-7 (CANL) - I26-4 (CG)		200 Ω or higher

GO TO STEP 15

13.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))

(a) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to Skid Control ECU (Brake Actuator Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-2 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
A194-6 (CANL) - I26-4 (CG)		200 Ω or higher

REPLACE NO. 2 CAN JUNCTION CONNECTOR

GO TO STEP 16

14.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR - HYBRID MOTOR CONTROL INVERTER ASSEMBLY)

(a) Disconnect the A187 hybrid motor control inverter assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to Hybrid Motor Control Inverter Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-1 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
A194-5 (CANL) - I26-4 (CG)		200 Ω or higher

REPLACE MG ECU (REPLACE HYBRID MOTOR CONTROL INVERTER ASSEMBLY)

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - HYBRID MOTOR CONTROL INVERTER ASSEMBLY)

15.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR - ECM)

(a) Disconnect the A47 ECM connector.

(b) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to ECM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-3 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
A194-7 (CANL) - I26-4 (CG)		200 Ω or higher

REPLACE ECM

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - ECM)

16.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))

(a) Disconnect the A151 skid control ECU (brake actuator assembly) connector.

(b) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to Skid Control ECU (Brake Actuator Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-2 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
A194-6 (CANL) - I26-4 (CG)		200 Ω or higher

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))

17.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)

(a) Disconnect the No. 9 Global CAN junction connector.

(b) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 9 Global CAN Junction Connector)

to Hybrid Vehicle Control ECU

Standard Resistance:

Tester Connection	Condition	Specified Condition
A193-2 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
A193-13 (CANL) - I26-16 (BAT)		6 kΩ or higher

GO TO STEP 20

18.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION CONNECTOR)

(a) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 9 Global CAN Junction Connector)

to No. 2 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
A193-3 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
A193-14 (CANL) - I26-16 (BAT)		6 kΩ or higher

GO TO STEP 22

19.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY))

(a) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 9 Global CAN Junction Connector)

to Electric Brake Booster (Brake Booster with Master Cylinder Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A193-1 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
A193-12 (CANL) - I26-16 (BAT)		6 kΩ or higher

REPLACE NO. 9 GLOBAL CAN JUNCTION CONNECTOR

GO TO STEP 21

20.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)

(a) Disconnect the I249 hybrid vehicle control ECU connector.

(b) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 9 Global CAN Junction Connector)

to Hybrid Vehicle Control ECU

Standard Resistance:

Tester Connection	Condition	Specified Condition
A193-2 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
A193-13 (CANL) - I26-16 (BAT)		6 kΩ or higher

REPLACE HYBRID VEHICLE CONTROL ECU

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)

21.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY))

(a) Disconnect the A189 electric brake booster (brake booster with master cylinder assembly) connector.

(b) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 9 Global CAN Junction Connector)

to Electric Brake Booster (Brake Booster with Master Cylinder Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A193-1 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
A193-12 (CANL) - I26-16 (BAT)		6 kΩ or higher

REPLACE ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY))

22.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR - NO. 9 GLOBAL CAN JUNCTION CONNECTOR)

(a) Disconnect the No. 2 CAN junction connector.

(b) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to No. 9 Global CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-4 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
A194-8 (CANL) - I26-16 (BAT)		6 kΩ or higher

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - NO. 9 GLOBAL CAN JUNCTION CONNECTOR)

23.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR - HYBRID MOTOR CONTROL INVERTER ASSEMBLY)

(a) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to Hybrid Motor Control Inverter Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-1 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
A194-5 (CANL) - I26-16 (BAT)		6 kΩ or higher

GO TO STEP 26

24.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR - ECM)

(a) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to ECM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-3 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
A194-7 (CANL) - I26-16 (BAT)		6 kΩ or higher

GO TO STEP 27

25.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))

(a) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to Skid Control ECU (Brake Actuator Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-2 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
A194-6 (CANL) - I26-16 (BAT)		6 kΩ or higher

REPLACE NO. 2 CAN JUNCTION CONNECTOR

GO TO STEP 28

26.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR - HYBRID MOTOR CONTROL INVERTER ASSEMBLY)

(a) Disconnect the A187 hybrid motor control inverter assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 4 CAN Junction Connector)

to Hybrid Motor Control Inverter Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-1 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
A194-5 (CANL) - I26-16 (BAT)		6 kΩ or higher

REPLACE MG ECU (REPLACE HYBRID MOTOR CONTROL INVERTER ASSEMBLY)

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - HYBRID MOTOR CONTROL INVERTER ASSEMBLY)

27.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR - ECM)

(a) Disconnect the A47 ECM connector.

(b) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to ECM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-3 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
A194-7 (CANL) - I26-16 (BAT)		6 kΩ or higher

REPLACE ECM

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - ECM)

28.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))

(a) Disconnect the A151 skid control ECU (brake actuator assembly) connector.

(b) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to Skid Control ECU (Brake Actuator Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-2 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
A194-6 (CANL) - I26-16 (BAT)		6 kΩ or higher

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))

29.	CHECK FOR SHORT IN CAN BUS LINES (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)

(a) Disconnect the No. 9 Global CAN junction connector.

(b) Measure the resistance according to the value(s) in the table below.

Front view of wire harness connector

(to No. 9 Global CAN Junction Connector)

to Hybrid Vehicle Control ECU

Standard Resistance:

Tester Connection	Condition	Specified Condition
A193-2 (CANH) - A193-13 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

GO TO STEP 32

30.	CHECK FOR SHORT IN CAN BUS LINES (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION CONNECTOR)

(a) Measure the resistance according to the value(s) in the table below.

Front view of wire harness connector

(to No. 9 Global CAN Junction Connector)

to No. 2 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
A193-3 (CANH) - A193-14 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

GO TO STEP 34

31.	CHECK FOR SHORT IN CAN BUS LINES (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY))

(a) Measure the resistance according to the value(s) in the table below.

Front view of wire harness connector

(to No. 9 Global CAN Junction Connector)

to Electric Brake Booster (Brake Booster with Master Cylinder Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A193-1 (CANH) - A193-12 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher

REPLACE NO. 9 GLOBAL CAN JUNCTION CONNECTOR

GO TO STEP 33

32.	CHECK FOR SHORT IN CAN BUS LINES (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)

(a) Disconnect the I249 hybrid vehicle control ECU connector.

(b) Measure the resistance according to the value(s) in the table below.

Front view of wire harness connector

(to No. 9 Global CAN Junction Connector)

to Hybrid Vehicle Control ECU

Standard Resistance:

Tester Connection	Condition	Specified Condition
A193-2 (CANH) - A193-13 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	1 MΩ or higher

REPLACE HYBRID VEHICLE CONTROL ECU

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)

33.	CHECK FOR SHORT IN CAN BUS LINES (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY))

(a) Disconnect the A189 electric brake booster (brake booster with master cylinder assembly) connector.

(b) Measure the resistance according to the value(s) in the table below.

Front view of wire harness connector

(to No. 9 Global CAN Junction Connector)

to Electric Brake Booster (Brake Booster with Master Cylinder Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A193-1 (CANH) - A193-12 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	1 MΩ or higher

REPLACE ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY))

34.	CHECK FOR SHORT IN CAN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR - NO. 9 GLOBAL CAN JUNCTION CONNECTOR)

(a) Reconnect the A193 No. 9 Global CAN junction connector.

(b) Disconnect the No. 2 CAN junction connector.

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to No. 9 Global CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-4 (CANH) - A194-8 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - NO. 9 GLOBAL CAN JUNCTION CONNECTOR)

35.	CHECK FOR SHORT IN CAN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR - HYBRID MOTOR CONTROL INVERTER ASSEMBLY)

(a) Measure the resistance according to the value(s) in the table below.

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to Hybrid Motor Control Inverter Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-1 (CANH) - A194-5 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher

GO TO STEP 38

36.	CHECK FOR SHORT IN CAN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR - ECM)

(a) Measure the resistance according to the value(s) in the table below.

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to ECM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-3 (CANH) - A194-7 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher

GO TO STEP 39

37.	CHECK FOR SHORT IN CAN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))

(a) Measure the resistance according to the value(s) in the table below.

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to Skid Control ECU (Brake Actuator Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-2 (CANH) - A194-6 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPLACE NO. 2 CAN JUNCTION CONNECTOR

GO TO STEP 40

38.	CHECK FOR SHORT IN CAN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR - HYBRID MOTOR CONTROL INVERTER ASSEMBLY)

(a) Disconnect the A187 hybrid motor control inverter assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to Hybrid Motor Control Inverter Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-1 (CANH) - A194-5 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	1 MΩ or higher

REPLACE MG ECU (REPLACE HYBRID MOTOR CONTROL INVERTER ASSEMBLY)

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - HYBRID MOTOR CONTROL INVERTER ASSEMBLY)

39.	CHECK FOR SHORT IN CAN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR - ECM)

(a) Disconnect the A47 ECM connector.

(b) Measure the resistance according to the value(s) in the table below.

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to ECM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-3 (CANH) - A194-7 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	1 MΩ or higher

REPLACE ECM

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - ECM)

40.	CHECK FOR SHORT IN CAN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))

(a) Disconnect the A151 skid control ECU (brake actuator assembly) connector.

(b) Measure the resistance according to the value(s) in the table below.

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to Skid Control ECU (Brake Actuator Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-2 (CANH) - A194-6 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	1 MΩ or higher

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))

41.	CHECK FOR OPEN IN CAN MAIN BUS LINES (HYBRID VEHICLE CONTROL ECU)

(a) Disconnect the hybrid vehicle control ECU connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I249-50 (CA3P) - I249-49 (CA3N)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

*a	Front view of wire harness connector (to Hybrid Vehicle Control ECU)

REPLACE HYBRID VEHICLE CONTROL ECU

42.	CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)

(a) Reconnect the I249 hybrid vehicle control ECU connector.

(b) Disconnect the No. 9 CAN junction connector.

Front view of wire harness connector

(to No. 9 Global CAN Junction Connector)

to Hybrid Vehicle Control ECU

Standard Resistance:

Tester Connection	Condition	Specified Condition
A193-2 (CANH) - A193-13 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)

43.	CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION CONNECTOR)

(a) Measure the resistance according to the value(s) in the table below.

Front view of wire harness connector

(to No. 9 Global CAN Junction Connector)

to No. 2 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
A193-3 (CANH) - A193-14 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPLACE NO. 9 GLOBAL CAN JUNCTION CONNECTOR

44.	CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR - NO. 9 GLOBAL CAN JUNCTION CONNECTOR)

(a) Reconnect the A193 No. 9 Global CAN junction connector.

(b) Disconnect the No. 2 CAN junction connector.

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to No. 9 Global CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-4 (CANH) - A194-8 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - NO. 9 GLOBAL CAN JUNCTION CONNECTOR)

45.	CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))

(a) Measure the resistance according to the value(s) in the table below.

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

to Skid Control ECU (Brake Actuator Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A194-2 (CANH) - A194-6 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPLACE NO. 2 CAN JUNCTION CONNECTOR

46.	CHECK FOR OPEN IN CAN MAIN BUS LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))

(a) Reconnect the A194 No. 2 CAN junction connector.

(b) Disconnect the skid control ECU (brake actuator assembly) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A151-11 (CA2H) - A151-25 (CA2L)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

*a	Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly))

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) - NO. 2 CAN JUNCTION CONNECTOR)

SEE MORE:

Removal

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Evaporative Emission System Pressure / Intake Air Pressure Signal Compare Failure (P106A62,P106C62)

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Toyota Corolla Cross: Lost Communication with Drive Motor Control Module "A" (U011000,U111A87,U115087,U115487,U115887,U117008,U117087)

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Evaporative Emission System Pressure / Intake Air Pressure Signal Compare Failure (P106A62,P106C62)