ECM Communication Stop Mode [11/2021 - ]: Procedure
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- CHECK VEHICLE TYPE
Result:
B
See step 4
Result:
A
See step 2
- CHECK FOR OPEN IN CAN BUS LINES (ECM MAIN LINE)
- Disconnect the cable from the negative (-) battery terminal.
- Disconnect the A20 ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition A20-8 (CANH) - A20-18 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Result
Result OK NG
Result:
NG
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (ECM)
Result:
OK
See step 3
- CHECK ECM POWER SOURCE CIRCUIT
- Check the ECM power source circuit.
Refer to ECM Power Source Circuit [11/2021 - ]
Result
Result OK NG
Result:
OK
REPLACE ECM. Refer to REMOVAL [11/2021 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
- Check the ECM power source circuit.
- CHECK FOR OPEN IN CAN BUS LINES (ECM MAIN LINE)
- Disconnect the cable from the negative (-) battery terminal.
- Disconnect the A19 ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition A19-26 (CANH) - A19-25 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Result
Result OK NG
Result:
NG
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (ECM)
Result:
OK
See step 5
- CHECK ECM POWER SOURCE CIRCUIT
- Check the ECM power source circuit.
Refer to ECM Power Source Circuit [11/2021 - ]
Result
Result OK NG
Result:
OK
REPLACE ECM. Refer to REMOVAL [11/2021 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
- Check the ECM power source circuit.