Ignition Switch Circuit

THEFT DETERRENT: THEFT DETERRENT SYSTEM: Ignition Switch Circuit

Ignition Switch Circuit

DESCRIPTION

When the ignition switch is turned ON, battery positive (+) voltage is applied to the theft warning ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (AM1, MPX-IG)
(a) Remove the AM1 and MPX-IG fuses from the driver side junction block.
(b) Measure the resistance of the fuses.
Standard resistance:
Below 1 Ohms
NG -- REPLACE FUSE
OK -- Continue to next step.
2. INSPECT IGNITION RELAY NO. 1
(a) Remove the IG1 relay from the driver side junction block.




(b) Measure the resistance of the relay.
Standard resistance:






NG -- REPLACE IGNITION RELAY NO. 1
OK -- Continue to next step.
3. INSPECT IGNITION SWITCH ASSEMBLY




(a) Measure the resistance of the switch.
Standard resistance:






NG -- REPLACE IGNITION SWITCH ASSEMBLY
OK -- Continue to next step.
4. CHECK WIRE HARNESS (IGNITION SWITCH - BATTERY AND BODY GROUND)
(a) Disconnect the I18 switch connector.




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






Standard voltage:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
5. CHECK WIRE HARNESS (THEFT WARNING ECU - BATTERY)
(a) Disconnect the T7 ECU connector.




(b) Measure the voltage of the wire harness side connector.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE