IG Power Source Circuit

STEERING COLUMN: POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM: IG Power Source Circuit

IG Power Source Circuit

DESCRIPTION

When the ignition switch is turned to the ON position, the IG power source circuit supplies positive voltage to the multiplex tilt & telescopic ECU.
The multiplex tilt & telescopic ECU also receives ignition switch signals via this circuit.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (ECU-IG NO.1 FUSE)
(a) Remove the ECU-IG No.1 fuse from the instrument panel J/B.
(b) Check the continuity of the ECU-IG No.1 fuse.
OK:
There is continuity.
NG -- REPLACE FUSE
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (BETWEEN MULTIPLEX TILT & TELESCOPIC ECU AND BATTERY)





(a) Disconnect the T4 connector from the multiplex tilt & telescopic ECU.
(b) Measure the voltage according to the value(s) in the table below.
Voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (BETWEEN MULTIPLEX TILT & TELESCOPIC ECU AND BODY GROUND)





(a) Measure the resistance according to the value(s) in the table below.
Resistance:






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