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

Click here

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:

• Electrical key verification confirmation

• Indoor, outside and door oscillator control

• Entry door LOCK/UNLOCK request to the main body ECU (instrument panel junction block)

• Steering LOCK/UNLOCK request

• Immobiliser SET/UNSET request to the ID code box (immobiliser code ECU)

Click here

INSPECTION PROCEDURE

Click here

PROCEDURE

1. Click here

   CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY)

   
   
   1. 

      Disconnect the certification ECU (smart key ECU assembly) connector.

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

      Standard voltage
      Tester Connection Condition Specified Condition D36-1 (+B) - Body ground Always 11 to 14 V D36-18 (IG) - Body ground Engine switch off Below 1 V D36-18 (IG) - Body ground Engine switch on (IG) 11 to 14 V D36-19 (ACC) - Body ground Engine switch off Below 1 V D36-19 (ACC) - Body ground Engine switch on (ACC) 11 to 14 V

   
   
   • OKClick here
   • NGClick here
2. Click here

   CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BODY GROUND)

   
   
   1. 

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

      Standard resistance
      Tester Connection Condition Specified Condition D36-17 (E) - Body ground Always Below 1 Ω

   
   
   • OKClick here
   • NGClick here
3. Click here

   REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

4. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR, OR REPLACE FUSE

5. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR