IG Power Source Circuit

THEFT DETERRENT: THEFT DETERRENT SYSTEM: IG Power Source Circuit

IG Power Source Circuit

DESCRIPTION
- When the engine switch is turned on (IG), positive (+) battery voltage is applied to the cowl side junction block RH (multiplex network body ECU).

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK BASIC FUNCTION (PUSH-BUTTON START FUNCTION)
(a) Check basic function of the push-button start function.
OK:
Basic function operates normally.
NG -- Go to SMART ACCESS SYSTEM WITH PUSH-BUTTON START
OK -- Continue to next step.
2. INSPECT FUSE (AM1, ECU-IG RH)
(a) Remove the AM1 and ECU-IG RH fuses from the cowl side junction block.
(b) Measure the resistance of the fuses.
Standard resistance:
Below 1 Ohms
NG -- REPLACE FUSE
OK -- Continue to next step.
3. CHECK WIRE HARNESS (COWL SIDE JUNCTION BLOCK RH - BATTERY)





(a) Disconnect the DM junction block connector.
(b) Measure the voltage of the wire harness side connector.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
4. CHECK COWL SIDE JUNCTION BLOCK RH





(a) Measure the voltage between the terminal of the connector and body ground.
Standard voltage:






NG -- REPLACE COWL SIDE JUNCTION BLOCK RH
OK -- Continue to next step.
5. CHECK WIRE HARNESS (COWL SIDE JUNCTION BLOCK RH - BODY GROUND)





(a) Disconnect the DD junction block connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
6. CHECK WIRE HARNESS (COWL SIDE JUNCTION BLOCK RH - POWER SOURCE CONTROL ECU)





(a) Disconnect the DD junction block connector.
(b) Disconnect the P6 ECU connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






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