Illumination Circuit
AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (w/ Multi-display with DVD Player): Illumination Circuit; 2013 MY Corolla [07/2012 -]
- 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 precaution for Supplemental Restraint System Service Precautions.
* Inspect the fuses for circuits related to this system before performing the following inspection procedure.
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:
B -- CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)
C -- GO TO LIGHTING SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)
(a) Disconnect the E6 spiral 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 SPIRAL CABLE SUB-ASSEMBLY
(a) Disconnect the Y1 steering pad switch assembly and E6 spiral cable sub-assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(c) After setting the spiral cable sub-assembly to the center position, rotate the spiral cable sub-assembly 2.5 times clockwise. Then while rotating the spiral cable sub-assembly 5 times counterclockwise, measure the resistance as shown 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.
* As the spiral cable sub-assembly may break, do not rotate the spiral cable sub-assembly more than the specified amount.
HINT
* Removal Removal
* Installation Installation
Text in Illustration
NG -- REPLACE SPIRAL CABLE SUB-ASSEMBLY Removal
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - NAVIGATION RECEIVER ASSEMBLY)
(a) Disconnect the E26 navigation receiver assembly connector.
(b) Disconnect the E6 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 Y1 steering pad switch assembly connector.
(b) Connect a positive (+) lead from the battery 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 -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table
6. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)
(a) Disconnect the E1 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 - BODY GROUND)
(a) Disconnect the E1 navigation receiver assembly connector.
(b) 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