Hybrid Vehicle Control ECU Communication Stop Mode [04/2020 - 09/2022]: Procedure
WARNING: This page is about a different variant/trim than selected.
- CHECK FOR OPEN IN CAN BUS LINES (HYBRID VEHICLE CONTROL ECU BRANCH LINE)
- Disconnect the cable from the negative (-) auxiliary battery terminal.
- Disconnect the I2 hybrid vehicle control ECU connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition I2-21 (CA1H) - I2-8 (CA1L) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω I2-7 (CA3P) - I2-20 (CA3N) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω *a Front view of wire harness connector
(to Hybrid Vehicle Control ECU)Result
Result OK NG
Result:
NG
REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (HYBRID VEHICLE CONTROL ECU)
Result:
OK
See step 2
- CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
- Disconnect the I3 hybrid vehicle control ECU connector.
- Reconnect the cable to the negative (-) auxiliary battery terminal.
- Measure the voltage according to the value(s) in the table below.
*a Front view of wire harness connector
(to Hybrid Vehicle Control ECU)- - Standard Voltage
Tester Connection Condition Specified Condition I3-27 (BATT) - Body ground Power switch off 11 to 14 V I2-35 (IG2) - Body ground Power switch on (IG) 11 to 14 V Result
Result OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
Result:
OK
See step 3
- CHECK ECU POWER SOURCE CIRCUIT
- Check the ECU power source circuit.
Refer to ECU Power Source Circuit [01/2019 - 09/2022]
Result
Result OK NG
Result:
OK
REPLACE HYBRID VEHICLE CONTROL ECU
Refer to REMOVAL [04/2020 - 09/2022]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
- Check the ECU power source circuit.