Illumination Circuit (to 12/2010)

NAVIGATION: NAVIGATION SYSTEM: Illumination Circuit
- Illumination Circuit

DESCRIPTION

Power is supplied to the navigation 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 SRS (Supplemental Restraint System). Before servicing (including removal or installation of parts), be sure to read the precautionary notice for Supplemental Restraint System Precaution (to 12/2010).

PROCEDURE

1. CHECK ILLUMINATION

(a) Check if the illumination for the navigation receiver assembly, steering pad switch assembly, 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:





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 SUB-ASSEMBLY)

(a) Disconnect the D15 spiral 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 SPIRAL CABLE SUB-ASSEMBLY

(a) Disconnect the a1 steering pad switch assembly and D15 spiral cable sub-assembly connectors.





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

Standard Resistance:





NOTICE:
The spiral cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable sub-assembly may prevent the airbag from deploying. Refer to the pages shown in the brackets.

HINT
* Removal Removal (to 12/2010)
* Installation Installation (to 12/2010)

Text in Illustration





NG -- REPLACE SPIRAL CABLE SUB-ASSEMBLY Removal (to 12/2010)
OK -- Continue to next step.

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

(a) Disconnect the E47 navigation receiver assembly.

(b) Disconnect the D15 spiral cable sub-assembly connector.

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

Standard Resistance:





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

5. INSPECT STEERING PAD SWITCH ASSEMBLY

(a) Disconnect the a1 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 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 (to 12/2010)

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table (to 12/2010)

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

(a) Disconnect the E52 navigation receiver 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.

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

(a) Disconnect the E52 navigation receiver assembly connector.

(b) Disconnect the E30 combination meter assembly 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 Problem Symptoms Table (to 12/2010)