Illumination Circuit
AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Illumination Circuit
- Illumination Circuit
DESCRIPTION
Power is supplied to the radio receiver 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 Airbag System (for TMC Made) for TMC Made, Airbag System (except TMC Made) for except TMC Made).
PROCEDURE
1. CHECK ILLUMINATION
(a) Check if the illumination for the radio receiver, 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:
E -- CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - BODY GROUND)
D -- GO TO METER / GAUGE SYSTEM How To Proceed With Troubleshooting
C -- GO TO LIGHTING SYSTEM How To Proceed With Troubleshooting
B -- CHECK HARNESS AND CONNECTOR (BATTERY - RADIO RECEIVER)
A -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (BATTERY - SPIRAL CABLE)
(a) Disconnect the spiral 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
(a) Disconnect the steering pad switch assembly connector.
(b) Connect a battery positive (+) lead to terminal IL+2 and a negative (-) lead to terminal EAU of the steering pad switch assembly connector.
(c) Check if the illumination for the steering pad switch assembly comes on.
OK:
Illumination for the steering pad switch assembly comes on.
Text in Illustration
NG -- REPLACE STEERING PAD SWITCH ASSEMBLY Removal
OK -- Continue to next step.
4. INSPECT SPIRAL CABLE
(a) Disconnect the steering pad switch assembly and spiral cable connectors.
(b) 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 prevent the airbag from deploying. Be sure to read the pages shown in the brackets.
HINT
* Removal Removal
* Installation Installation
Text in Illustration
NG -- REPLACE SPIRAL CABLE Removal
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - RADIO RECEIVER)
(a) Disconnect the radio receiver and spiral cable connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
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 (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 8 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 ASSEMBLY)
(a) Disconnect the radio receiver and combination meter assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
*4: for 8 Speakers
*5: for 6 Speakers (w/ USB Audio System)
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table
8. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - BODY GROUND)
(a) Disconnect the radio receiver connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table