Toyota Corolla Cross: Lost Communication with Brake System Control Module (ch2) Missing Message (U117087)
DESCRIPTION
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Note |
|---|---|---|---|---|
|
U117087 |
Lost Communication with Brake System Control Module (ch2) Missing Message |
Communication stops between the engine stop and start ECU and the brake actuator assembly. |
|
DTC Output from
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
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.
Click here
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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.
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HINT:
When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
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- 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 ECM, 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.
|
*a |
Component with harness connected (No. 9 Global CAN Junction Connector) |
- |
- |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A193-1 (CANH) - A193-12 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
Below 70 Ω |
| NG | .gif) |
GO TO STEP 23 |
|
.gif)
|
2. |
CHECK FOR SHORT IN CAN BUS LINES |
(a) Measure the resistance according to the value(s) in the table below.
|
*a |
Component with harness connected (No. 9 Global CAN Junction Connector) |
- |
- |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A193-1 (CANH) - A193-12 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
54 Ω or higher |
| NG | |
GO TO STEP 17 |
|
|
3. |
CHECK FOR SHORT TO +B IN CAN BUS LINE |
(a) Measure the resistance according to the value(s) in the table below.
|
*1 |
DLC3 |
- |
- |
|
*a |
Component with harness connected (No. 9 Global CAN Junction Connector) |
- |
- |
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) |
| NG | |
GO TO STEP 11 |
|
|
4. |
CHECK FOR SHORT TO GND IN CAN BUS LINE |
(a) Measure the resistance according to the value(s) in the table below.
|
*1 |
DLC3 |
- |
- |
|
*a |
Component with harness connected (No. 9 Global CAN Junction Connector) |
- |
- |
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) |
| OK | |
INSPECT FOR INTERMITTENT PROBLEMS |
|
|
5. |
CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) |
(a) Disconnect the No. 9 global CAN junction connector.
(b) Measure the resistance according to the value(s) in the table below.
|
*1 |
DLC3 |
- |
- |
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to Brake Actuator 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) |
| NG | |
GO TO STEP 8 |
|
|
6. |
CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) |
(a) Measure the resistance according to the value(s) in the table below.
|
*1 |
DLC3 |
- |
- |
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to Engine Stop and Start ECU |
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) |
| NG | |
GO TO STEP 9 |
|
|
7. |
CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ECM) |
(a) Measure the resistance according to the value(s) in the table below.
|
*1 |
DLC3 |
- |
- |
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to ECM |
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) |
| OK | |
REPLACE NO. 9 GLOBAL CAN JUNCTION CONNECTOR |
| NG | |
GO TO STEP 10 |
|
8. |
CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) |
(a) Disconnect the A151 brake actuator assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
|
*1 |
DLC3 |
- |
- |
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to Brake Actuator 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) |
| OK | |
REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG | |
REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) |
|
9. |
CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) |
(a) Disconnect the I230 engine stop and start ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
|
*1 |
DLC3 |
- |
- |
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to Engine Stop and Start ECU |
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) |
| OK | |
REPLACE ENGINE STOP AND START ECU |
| NG | |
REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) |
|
10. |
CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ECM) |
(a) Disconnect the A47 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
|
*1 |
DLC3 |
- |
- |
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to ECM |
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) |
| OK | |
REPLACE ECM |
| NG | |
REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ECM) |
|
11. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) |
(a) Disconnect the No. 9 global CAN junction connector.
(b) Measure the resistance according to the value(s) in the table below.
|
*1 |
DLC3 |
- |
- |
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to Brake Actuator 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) |
| NG | |
GO TO STEP 14 |
|
|
12. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) |
(a) Measure the resistance according to the value(s) in the table below.
|
*1 |
DLC3 |
- |
- |
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to Engine Stop and Start ECU |
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) |
| NG | |
GO TO STEP 15 |
|
|
13. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ECM) |
(a) Measure the resistance according to the value(s) in the table below.
|
*1 |
DLC3 |
- |
- |
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to ECM |
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) |
| OK | |
REPLACE NO. 9 GLOBAL CAN JUNCTION CONNECTOR |
| NG | |
GO TO STEP 16 |
|
14. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) |
(a) Disconnect the A151 brake actuator assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
|
*1 |
DLC3 |
- |
- |
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to Brake Actuator 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) |
| OK | |
REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG | |
REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) |
|
15. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) |
(a) Disconnect the I230 engine stop and start ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
|
*1 |
DLC3 |
- |
- |
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to Engine Stop and Start ECU |
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) |
| OK | |
REPLACE ENGINE STOP AND START ECU |
| NG | |
REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) |
|
16. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ECM) |
(a) Disconnect the A47 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
|
*1 |
DLC3 |
- |
- |
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to ECM |
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) |
| OK | |
REPLACE ECM |
| NG | |
REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ECM) |
|
17. |
CHECK FOR SHORT IN CAN BUS LINES (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) |
(a) Disconnect the No. 9 global CAN junction connector.
(b) Measure the resistance according to the value(s) in the table below.
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to Brake Actuator Assembly |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A193-1 (CANH) - A193-12 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
| NG | |
GO TO STEP 20 |
|
|
18. |
CHECK FOR SHORT IN CAN BUS LINES (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) |
(a) Measure the resistance according to the value(s) in the table below.
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to Engine Stop and Start ECU |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A193-3 (CANH) - A193-14 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
| NG | |
GO TO STEP 21 |
|
|
19. |
CHECK FOR SHORT IN CAN BUS LINES (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ECM) |
(a) Measure the resistance according to the value(s) in the table below.
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to ECM |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A193-2 (CANH) - A193-13 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
| OK | |
REPLACE NO. 9 GLOBAL CAN JUNCTION CONNECTOR |
| NG | |
GO TO STEP 22 |
|
20. |
CHECK FOR SHORT IN CAN BUS LINES (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) |
(a) Disconnect the A151 brake actuator assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to Brake Actuator 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 |
| OK | |
REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG | |
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) |
|
21. |
CHECK FOR SHORT IN CAN BUS LINES (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) |
(a) Disconnect the I230 engine stop and start ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to Engine Stop and Start ECU |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A193-3 (CANH) - A193-14 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
1 MΩ or higher |
| OK | |
REPLACE ENGINE STOP AND START ECU |
| NG | |
REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) |
|
22. |
CHECK FOR SHORT IN CAN BUS LINES (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ECM) |
(a) Disconnect the A47 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to ECM |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A193-2 (CANH) - A193-13 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
1 MΩ or higher |
| OK | |
REPLACE ECM |
| NG | |
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ECM) |
|
23. |
CHECK FOR OPEN IN CAN MAIN BUS LINES (BRAKE ACTUATOR ASSEMBLY) |
(a) Disconnect the brake actuator assembly connector.
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK | |
REPLACE BRAKE ACTUATOR ASSEMBLY |
|
|
24. |
CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) |
(a) Reconnect the A151 brake actuator assembly connector.
(b) Disconnect the No. 9 global CAN junction connector.
(c) Measure the resistance according to the value(s) in the table below.
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to Brake Actuator Assembly |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A193-1 (CANH) - A193-12 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
| NG | |
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) |
|
|
25. |
CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ECM) |
(a) Measure the resistance according to the value(s) in the table below.
|
*a |
Front view of wire harness connector (to No. 9 Global CAN Junction Connector) |
*b |
to ECM |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A193-2 (CANH) - A193-13 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
| OK | |
REPLACE NO. 9 GLOBAL CAN JUNCTION CONNECTOR |
|
|
26. |
CHECK FOR OPEN IN CAN MAIN BUS LINES (ECM) |
(a) Reconnect the A193 No. 9 global CAN junction connector.
(b) Disconnect the ECM connector.
|
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK | |
REPLACE ECM |
| NG | |
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 9 GLOBAL CAN JUNCTION CONNECTOR - ECM) |
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