ENGINE IMMOBILISER SYSTEM (w/ Entry and Start System) Certification ECU Power Source Circuit

DESCRIPTION

This is the power source circuit of the certification ECU.

The certification ECU controls the following:

• Key verification confirmation

• Indoor, outside and door oscillator control

• Entry LOCK/UNLOCK request to the main body ECU

• Steering LOCK/UNLOCK request

• Immobiliser SET/UNSET request to the ID code box

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

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

   
   
   1. 

      Text in Illustration

      *1	Front view of wire harness connector (to Certification ECU)

      Disconnect the certification ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition D34-1 (+B) - Body ground Always 11 to 14 V D34-16 (IG) - Body ground Engine switch off Below 1 V D34-16 (IG) - Body ground Engine switch on (IG) 11 to 14 V D34-17 (CUTB) - Body ground Always 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition D34-15 (E) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here