Power Source Circuit: Procedure
WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT MULTIPLEX NETWORK BODY ECU (BATB, BECU - ALTB TERMINALS)
- Disconnect the instrument panel J/B (IA, ID) connectors.
- Measure the voltage according to the value(s) in the table below.
Voltage
Tester Connection Condition Specified Condition IA-1 (BATB) - Body ground Always 10 to 14 V ID-10 (BECU) - Body ground Always 10 to 14 V ID-16 (ALTB) - Body ground Always 10 to 14 V
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (BATB, BECU OR ALTB CIRCUIT)
OK: Go to next step
- INSPECT MULTIPLEX NETWORK BODY ECU (GND TERMINAL)
- Disconnect the instrument panel J/B (IF, IM) connectors.
- Measure the resistance according to the value(s) in the table below.
Resistance
Tester Connection Condition Specified Condition IF-10 (GND1) - Body ground Always Below 1 Ω IM-9 (GND2) - Body ground Always Below 1 Ω
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)
OK → PROCEED TO PROBLEM SYMPTOMS TABLE NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE