Illumination Circuit
AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (w/o Navigation System): Illumination Circuit
- Illumination Circuit
DESCRIPTION
Power is supplied to the radio receiver assembly and steering pad switch assembly 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.
* Inspect the fuse for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1. CHECK ILLUMINATION
(a) Check if the illumination for the radio receiver assembly, steering pad switch assembly, 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:
B -- CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)
C -- GO TO LIGHTING SYSTEM How To Proceed With Troubleshooting
D -- GO TO METER / GAUGE SYSTEM How To Proceed With Troubleshooting
A -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)
(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:
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) Check that the steering pad switch assembly illuminates according to the table below.
OK:
Text in Illustration
NG -- REPLACE STEERING PAD SWITCH ASSEMBLY Removal
OK -- Continue to next step.
4. INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY
(a) Disconnect the steering pad switch assembly and spiral with sensor cable sub-assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(c) After setting the spiral with sensor cable sub-assembly to the center position, rotate the spiral with sensor cable sub-assembly 2.5 times clockwise. Then while rotating the spiral with sensor cable sub-assembly 5 times counterclockwise, measure the resistance as shown 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. Refer to the pages shown in the brackets.
* As the spiral with sensor cable sub-assembly may break, do not rotate the spiral with sensor cable sub-assembly more than the specified amount.
HINT
* Removal Removal
* Installation Installation
Text in Illustration
NG -- REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Removal
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR
(a) Disconnect the radio receiver assembly and spiral with sensor cable sub-assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for 10 Speakers
for 6 Speakers
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 (ILLUMINATION SIGNAL)
(a) Disconnect the radio receiver assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
for 10 Speakers
for 6 Speakers
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - COMBINATION METER ASSEMBLY)
(a) Disconnect the radio receiver assembly and combination meter assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for 10 Speakers
for 6 Speakers
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table