ENGINE IMMOBILISER SYSTEM Power Source Circuit

DESCRIPTION

This circuit provides power to operate the transponder key ECU.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (ECU-B, IGN)

   
   

   1. 

      Remove the ECU-B fuse from the engine room R/B No, 2.

   2. Remove the IGN fuse from the instrument panel J/B.

   3. Check the ECU-B and IGN fuses resistance.

      Standard resistance
      Below 1 Ω

   4. Reinstall the fuses.

   
   

   NG

   REPLACE FUSE

   OK

2. INSPECT IGNITION SWITCH ASSEMBLY

   
   

   1. 

      Remove the ignition switch.

   2. Check the resistance.

      Standard resistance
      Tester Connection Switch Condition Specified Condition 6 (IG2) - 7 (AM2) LOCK 10 kΩor higher ON, START Below 1 Ω

   3. Reinstall the ignition switch.

   
   

   NG

   REPLACE IGNITION SWITCH ASSEMBLY

   OK

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

   
   

   1. 

      Disconnect the H44 transponder key ECU connector.

   2. Check the resistance.

      Standard resistance
      Tester Connection Condition Specified Condition H44-16 (GND) - Body ground Always Below 1 Ω

      Standard voltage
      Tester Connection Condition Specified Condition H44-1 (+B) - Body ground Always 11 to 14 V H44-2 (IG) - Body ground Ignition switch OFF Below 1 V Ignition switch ON 11 to 14 V

   3. Reconnect the transponder key ECU connector.

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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