Audio And Visual System (W/ Multi-Display With Dvd Player) Illumination Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK ILLUMINATION

CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)

INSPECT SPIRAL CABLE SUB-ASSEMBLY

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

INSPECT STEERING PAD SWITCH ASSEMBLY

CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. 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 (COROLLA_ZRE142 RM000000KT10H0X.html).
   
2. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
   

1. 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:

   
   

   Result	Proceed to
   Illumination comes on for all components except steering pad switch assembly.	A
   Illumination comes on for all components except navigation receiver assembly.	B
   No illumination comes on (navigation receiver assembly, hazard switch, glove box, etc.).	C

1. Disconnect the E6 spiral cable sub-assembly connector.
   

2. Measure the voltage according to the value(s) in the table below.
   

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   E6-12 (IL+2) - Body ground	Light control switch in the tail or head position	11 to 14 V

1. Disconnect the Y1 steering pad switch assembly and E6 spiral cable sub-assembly connectors.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   Y1-8 (EAU) - E6-4 (EAU)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   Y1-5 (IL+2) - E6-12 (IL+2)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right

3. 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:

   Tester Connection	Condition	Specified Condition
   Y1-5 (IL+2) - E6-12 (IL+2)	Always	Below 1 Ω
   Y1-8 (EAU) - E6-4 (EAU)	Always	Below 1 Ω

   NOTICE:

   1. 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.
      
   2. As the spiral cable sub-assembly may break, do not rotate the spiral cable sub-assembly more than the specified amount.
      

   HINT:

   1. Removal (COROLLA_ZRE142 RM000000UWD09PX.html)
      

   Text in Illustration

   *a	Component without harness connected (Spiral Cable Sub-assembly)
   *b	Steering Pad Switch Assembly Side
   *c	Vehicle Side

1. Disconnect the E26 navigation receiver assembly connector.
   

2. Disconnect the E6 spiral cable sub-assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E26-6 (SWG) - E6-4 (EAU)	Always	Below 1 Ω
   E6-4 (EAU) - Body ground	Always	10 kΩ or higher

1. Disconnect the Y1 steering pad switch assembly connector.
   

2. 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.
   

   
   
   
   

3. 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

   *a

   Component without harness connected (Steering Pad Switch Assembly)

   -

   -

1. Disconnect the E1 navigation receiver assembly connector.
   

2. Measure the voltage according to the value(s) in the table below.
   

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   E1-10 (ILL+) - Body ground	Light control switch in the tail or head position	11 to 14 V

1. Disconnect the E1 navigation receiver assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E1-7 (E) - Body ground	Always	Below 1 Ω