Toyota Corolla Cross: Certification ECU Communication Stop Mode
DESCRIPTION
Detection Item
|
Symptom
|
Trouble Area
|
Certification ECU Communication Stop Mode
|
Communication stop for "Certification (Smart)" and/or "Power Management"
is indicated on the "Communication Bus Check" screen of the GTS.
Click here
|
- Certification ECU (smart key ECU assembly) branch line or connector
- Power source circuit of certification ECU (smart key ECU assembly)
- Certification ECU (smart key ECU assembly) ground circuit
- Certification ECU (smart key ECU assembly)
|
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.
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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.
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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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- Inspect the fuses for circuits related to this system before performing
the following procedure.
- Before replacing the certification ECU (smart key ECU assembly), 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 BUS LINES (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
BRANCH LINE)
|
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the certification ECU (smart key ECU assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
I222-1 (CANH) - I222-2 (CANL)
|
Cable disconnected from negative (-) auxiliary battery terminal
|
54 to 69 Ω
|
|
|
*a
|
Front view of wire harness connector
(to Certification ECU (Smart Key ECU Assembly))
|
|
|
NG |
|
REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (CERTIFICATION ECU (SMART
KEY ECU ASSEMBLY))
|
OK |
|
|
2.
|
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
|
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
I222-29 (E) - Body ground
|
Cable disconnected from negative (-) auxiliary battery terminal
|
Below 1 Ω
|
|
|
*a
|
Front view of wire harness connector
(to Certification ECU (Smart Key ECU Assembly))
|
|
|
(b) Reconnect the cable to the negative (-) auxiliary battery terminal.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
I222-6 (+B) - Body ground
|
Always
|
11 to 14 V
|
OK |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
|
READ NEXT:
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Detection Item
Symptom
Trouble Area
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Communication stop for "Airbag" is
DESCRIPTION
Detection Item
Symptom
Trouble Area
Headlight ECU RH Communication Stop Mode
Communication stop for "Headlight Control (S
DESCRIPTION
Detection Item
Symptom
Trouble Area
Engine Stop and Start ECU Communication Stop Mode
Communication stop for "Stop and Go
SEE MORE:
REASSEMBLY CAUTION / NOTICE / HINT COMPONENTS (REASSEMBLY)
Procedure Part Name Code
1 REAR BUMPER REINFORCEMENT SUB-ASSEMBLY
52023 -
- -
2 REAR BUMPER UPPER RETAINER LH
52563A -
- -
3 REAR BUMPER UPPER RETAINER RH
52
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot the automatic high beam
system.
*: Use the GTS.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
2.