Illumination Circuit

AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Illumination Circuit

Illumination Circuit

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
NOTICE: The vehicle is equipped with an Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System Service Precautions.

PROCEDURE

1. CHECK ILLUMINATION
(a) Check if the illumination for the radio receiver, steering pad switch, heater control switch 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)
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (BATTERY - SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY)




(a) Disconnect the spiral with sensor cable sub-assembly 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
(a) Disconnect the steering pad switch connector.
(b) Connect a battery 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 comes on.






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

4. INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY




(a) Disconnect the steering pad switch and spiral with sensor cable sub-assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





NOTICE: The spiral with sensor cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral with sensor cable sub-assembly may prevent the airbag from deploying.
HINT:
- Removal Removal
- Installation Installation

Text in Illustration





NG -- REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY
OK -- Continue to next step.

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




(a) Disconnect the connectors from the radio receiver and spiral with sensor cable sub-assembly.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





Text in Illustration





- *3: for 13 Speakers
- *4: for 6 Speakers

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)




(a) Disconnect the radio receiver connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:





Text in Illustration





- *3: for 13 Speakers
- *4: for 6 Speakers

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

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




(a) Disconnect the radio receiver and combination meter connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





Text in Illustration





- *4: for 13 Speakers
- *5: for 6 Speakers

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