Certification ECU Power Source Circuit

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

Certification ECU Power Source Circuit

DESCRIPTION

This is the power source circuit of the certification ECU (smart key ECU assembly).
The certification ECU (smart key ECU assembly) controls the following:

- Key verification confirmation
- Indoor, outside and door oscillator control
- Entry door LOCK/UNLOCK request to the main body ECU RH (cowl side junction block RH)
- Steering LOCK/UNLOCK request
- Immobiliser SET/UNSET request to the ID code box (immobiliser code ECU)

WIRING DIAGRAM





INSPECTION PROCEDURE
NOTICE: If the certification ECU (smart key ECU assembly) is replaced, register the key Engine Immobilizer System.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY)





(a) Disconnect the certification ECU (smart 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 (CERTIFICATION 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 INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE