Illumination Circuit

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Illumination Circuit
- Illumination Circuit

DESCRIPTION

Power is supplied to the radio receiver assembly and steering pad switch illumination when the light control switch is in the TAIL or HEAD position.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
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 in the Supplemental Restraint System Service Precautions.

PROCEDURE

1. CHECK ILLUMINATION

(a) Check if the illumination for the radio receiver assembly, steering pad switch, glove box or others (hazard switch, transmission control switch, etc.) comes on when the light control switch is turned to the HEAD or TAIL position.

Result





D -- GO TO METER / GAUGE SYSTEM

C -- GO TO LIGHTING SYSTEM

B -- CHECK HARNESS AND CONNECTOR (BATTERY - RADIO RECEIVER ASSEMBLY)
A -- Continue to next step.

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

(a) Disconnect the E7 spiral cable connector.





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

Standard Voltage:





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

3. INSPECT STEERING PAD SWITCH ASSEMBLY

(a) Disconnect the steering pad switch assembly connector.

(b) Connect a positive (+) lead to terminal IL+2 and a negative (-) lead to terminal EAU of the steering pad switch connector.





(c) Check if the illumination for the steering pad switch comes on.

OK:

Illumination for the steering pad switch assembly comes on.

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

4. INSPECT SPIRAL CABLE

(a) Disconnect the z1 steering pad switch connector.





(b) Disconnect the E7 spiral cable connector.

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

Standard Resistance:





NOTICE:
The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may cause airbag deployment. Be sure to refer to the "See page" shown in the brackets.

HINT
* Removal Removal
* Installation Installation

NG -- REPLACE SPIRAL CABLE
OK -- Continue to next step.

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

(a) Disconnect the E88 receiver connector.





(b) Disconnect the E7 cable connector.

(c) 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

6. CHECK HARNESS AND CONNECTOR (BATTERY - RADIO RECEIVER ASSEMBLY)

(a) Disconnect the E62 (*1) or E47 (*2) receiver connector.





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

Standard Voltage:





HINT
*1: Separate Type Amplifier System

*2: Built-in Type Amplifier System

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

7. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - COMBINATION METER)

(a) Disconnect the E62 (*1) or E48 (*2) receiver connector.





(b) Disconnect the E19 meter connector.

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

Standard Resistance:





HINT
*1: Separate Type Amplifier System

*2: Built-in Type Amplifier System

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

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