Illumination Circuit

AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (w/o Navigation System): Illumination Circuit
- Illumination Circuit

CAUTION / NOTICE / HINT

DESCRIPTION

Power is supplied to the radio receiver and steering pad switch illumination when the light control switch is in the tail or head position.

WIRING DIAGRAM





INSPECTION PROCEDURE

CAUTION:
* The vehicle is equipped with an SRS (Supplemental Restraint System) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the Precaution for the SRS Service Precautions.
* Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE

1. CHECK ILLUMINATION

(a) Check if the illumination for the multi-display, steering pad switch, glove box light, cigarette lighter, or others (seat heater switch, front seat memory switch, etc.) comes on when the light control switch is turned to the head or tail position.

Result





C -- GO TO LIGHTING SYSTEM How To Proceed With Troubleshooting

B -- CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MAIN BODY ECU)
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (BATTERY - SPIRAL CABLE)





(a) Disconnect the E12 cable connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT STEERING PAD SWITCH ASSEMBLY (STEERING PAD SIDE)





(a) Disconnect the z35 switch connector.

(b) Apply battery voltage to the terminals of the connector, and check the LED illumination condition.

OK





NG -- REPLACE STEERING PAD SWITCH ASSEMBLY Removal
OK -- Continue to next step.

4. INSPECT SPIRAL CABLE SUB-ASSEMBLE





Text in Illustration





(a) Remove the spiral cable Removal.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





CAUTION:
The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to read the Precaution for the SRS.

* Removal Removal.
* Installation Installation.
NG -- REPLACE SPIRAL CABLE SUB-ASSEMBLY Removal
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - RADIO RECEIVER)

(a) Disconnect the F19 radio receiver connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table

6. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MAIN BODY ECU)

(a) Disconnect the F19 receiver connector.

(b) Disconnect the F2 main body ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE RADIO RECEIVER ASSEMBLY Removal