Headlight ECU LH Communication Stop Mode [11/2023 - ]: Procedure
WARNING: This page is about a different variant/trim than selected.
- CHECK FOR OPEN IN CAN BUS LINES (HEADLIGHT ECU SUB-ASSEMBLY LH BRANCH LINE)
- Disconnect the cable from the negative (-) auxiliary battery terminal.
- Disconnect the A87 headlight ECU sub-assembly LH connector.
- Measure the resistance according to the value(s) in the table below.
*a Front view of wire harness connector
(to Headlight ECU Sub-assembly LH)Standard Resistance
Tester Connection Condition Specified Condition A87-24 (CANH) - A87-23 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (HEADLIGHT ECU SUB-ASSEMBLY LH)
Result:
OK
See step 2
- CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
- Measure the resistance according to the value(s) in the table below.
*a Front view of wire harness connector
(to Headlight ECU Sub-assembly LH)Standard Resistance
Tester Connection Condition Specified Condition A87-12 (GND) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω - Reconnect the cable to the negative (-) auxiliary battery terminal.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition A87-6 (IGR) - Body ground Ignition switch ON 11 to 14 V A87-13 (ECUB) - Body ground Ignition switch ON 11 to 14 V Result
Proceed to OK NG
Result:
OK
REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH
Refer to REMOVAL [11/2023 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
- Measure the resistance according to the value(s) in the table below.
