ECU Power Source Circuit: Procedure
- CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU - BATTERY AND BODY GROUND)
- Disconnect the A33 ECU connector.
- Measure the voltage according to the value(s) in the table below.
Standard voltage
Tester Connection Switch Condition Specified Condition A33-13 (B) - Body ground Engine switch on (IG) 11 to 14 V A33-13 (B) - Body ground Engine switch off Below 1 V - Measure the resistance according to the value(s) in the table below.
Standard resistance
Tester Connection Condition Specified Condition A33-25 (GND) - Body ground Always Below 1 Ω
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → See step 2
- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [09/2012 - ]