Component Tests and General Diagnostics

ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: ECU Power Source Circuit

ECU Power Source Circuit

DESCRIPTION

This circuit provides power to operate the transponder key ECU assembly.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSES (ECU-B AND IGN)
(a) Remove the ECU-B fuse from the engine room R/B and J/B.
(b) Remove the IGN fuse from the driver side J/B.
(c) Measure the resistance of the fuse.
Standard resistance:
Below 1 Ohms
(d) Reinstall fuses.
NG -- REPLACE FUSE
OK -- Continue to next step.

2. INSPECT IGNITION SWITCH ASSEMBLY




(a) Remove the ignition switch.
(b) Measure the resistance of the switch.
Standard resistance:






NG -- REPLACE IGNITION SWITCH ASSEMBLY
OK -- Continue to next step.

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




(a) Disconnect the T10 ECU connector.
(b) Measure the resistance and voltage of the wire harness side connector.
Standard resistance:






Standard voltage:





(c) Reconnect the ECU connector.
NG -- REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR
OK -- REPLACE TRANSPONDER KEY ECU ASSEMBLY