ENGINE IMMOBILISER SYSTEM > Power Source Circuit


DESCRIPTION

This circuit provides power to operate the transponder key ECU.

WIRING DIAGRAM


B110400E01


INSPECTION PROCEDURE

1.INSPECT FUSE (ECU-B, DCC, IGN)

  1. Remove the ECU-B and DCC fuses from the engine room relay block.

  1. Remove the IGN fuse from the instrument panel junction block.

  1. Measure the resistance of the fuses.

    Standard resistance:
    Below 1 Ω



NG
REPLACE FUSE
OK


2.INSPECT IGNITION SWITCH
B110407E02

  1. Remove the ignition switch.

  1. Measure the resistance of the switch.

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



NG
REPLACE IGNITION SWITCH
OK


3.CHECK WIRE HARNESS (TRANSPONDER KEY ECU ASSEMBLY - BATTERY AND BODY GROUND)
B110782E01

  1. Disconnect the T21 ECU connector.

  1. Measure the resistance and voltage of the wire harness side connector.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    T21-16 (GND) - Body ground
    		Always
    		Below 1 Ω

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    T21-1 (+B) - Body ground
    		Always
    		10 to 14 V
    T21-2 (IG) - Body ground
    		Ignition switch OFF
    		Below 1 V
    Ignition switch ON
    		10 to 14 V



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE TRANSPONDER KEY ECU ASSEMBLY