Inspection Procedure 4: Vehicle power does not turn ON. (Not possible with power supply mode ON only)
|caution||Before replacing the ECU,
ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
COMMENTS ON TROUBLE SYMPTOM
- Malfunction of OSS-ECU
- Malfunction of ETACS-ECU
- Damaged harness wires and connectors
STEP 1. M.U.T.-III diagnosis code
Is the diagnosis code set?
STEP 2. Voltage measurement at ETACS-ECU connector (IG1 terminal)
|(1)With the ETACS-ECU connector kept connected, measure by backprobing.
|(2)Using the M.U.T.-III, set the forced power supply output to "IG-ON".(Refer to .)
|(3)Measure the voltage between the ETACS-ECU connector (IG1 terminal) and body earth.
OK: System voltage