Illumination Circuit

NAVIGATION: NAVIGATION SYSTEM: Illumination Circuit
- Illumination Circuit

DESCRIPTION

Power is supplied to the navigation 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). 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 navigation 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 tail or head position.

Result:

E -- CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - BODY GROUND)

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

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

B -- CHECK HARNESS AND CONNECTOR (BATTERY - NAVIGATION RECEIVER ASSEMBLY)
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 SPIRAL CABLE

(a) Disconnect the steering pad switch 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. Refer to the pages shown in the brackets.

HINT
* Removal Removal
* Installation Installation

Text in Illustration

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

4. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - NAVIGATION RECEIVER ASSEMBLY)

(a) Disconnect the navigation receiver assembly.

(b) Disconnect the spiral cable connector.

Text in Illustration

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

5. 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.

Text in Illustration

NG -- REPLACE STEERING PAD SWITCH ASSEMBLY Removal

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

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

(a) Disconnect the navigation receiver assembly connector.

(b) Disconnect the navigation receiver assembly connector (for 6 Speakers).

Text in Illustration

*3: for 8 Speakers

*4: for 6 Speakers

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

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

(a) Disconnect the navigation receiver assembly connector.

(b) Disconnect the combination meter connector assembly.

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- GO TO METER / GAUGE SYSTEM How To Proceed With Troubleshooting

8. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - BODY GROUND)

(a) Disconnect the navigation receiver assembly 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 Symptom Related Diagnostic Procedures