ECU Power Source Circuit

THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM: ECU Power Source Circuit
- ECU Power Source Circuit

DESCRIPTION

This circuit provides power to operate the transponder key ECU assembly.

WIRING DIAGRAM









INSPECTION PROCEDURE

NOTICE:
If the transponder key ECU assembly is replaced, register the key and ECU communication ID Programming and Relearning.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - BATTERY)

(a) Disconnect the transponder key ECU assembly connector.





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR, OR REPLACE FUSE
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - BODY GROUND)

(a) Measure the resistance according to the value(s) in the table below.





Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures