AUDIO AND VISUAL SYSTEM (w/o Navigation System) > Illumination Circuit

for Preparation Click here


DESCRIPTION

Power is supplied to the radio receiver assembly and steering pad switch assembly illumination when the light control switch is in the tail or head position.

WIRING DIAGRAM


E222752E01


INSPECTION PROCEDURE

NOTICE:
  1. 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 (Click here).
  2. Inspect the fuse for circuits related to this system before performing the following inspection procedure.

1.CHECK ILLUMINATION

  1. Check if the illumination for the radio receiver assembly, 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:

    Result
    		Proceed to
    Illumination comes on for all components except steering pad switch assembly.
    		A
    Illumination comes on for all components except radio receiver assembly.
    		B
    No illumination comes on (radio receiver assembly, hazard switch, heater control switch, etc.).
    		C
    Illumination comes on only for steering pad switch assembly.
    		D



B
Go to step 6

C
GO TO LIGHTING SYSTEM (Click here)

D
GO TO METER / GAUGE SYSTEM (Click here)
A


2.CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)

  1. Disconnect the spiral with sensor cable sub-assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    H30-13 (IL+2) - Body ground
    		Light control switch in the tail or head position
    		11 to 14 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT STEERING PAD SWITCH ASSEMBLY

  1. Disconnect the steering pad switch assembly connector.



  1. Check that the steering pad switch assembly illuminates according to the table below.


    E222754E01


    OK:

    Connection
    		Specified Condition
    Auxiliary battery positive (+) → z4-5 (IL+2)
    Auxiliary battery negative (-) → z4-8 (EAU)
    		Switches of steering pad switch LH side illuminates
    Auxiliary battery positive (+) → z4-5 (IL+2)
    Auxiliary battery negative (-) → z4-3 (-DP)
    		Switches of steering pad switch RH side illuminates


    Text in Illustration 
    *a
    		Component without harness connected
    (Steering Pad Switch Assembly)
    		-
    		-



NG
REPLACE STEERING PAD SWITCH ASSEMBLY (Click here)
OK


4.INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY

  1. Disconnect the steering pad switch assembly and spiral with sensor cable sub-assembly connectors.



    E210267E04

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    z4-8 (EAU) - H30-3 (EAU)
    		Center
    		Below 1 Ω
    2.5 rotations to the left
    2.5 rotations to the right
    z4-5 (IL+2) - H30-13 (IL+2)
    		Center
    		Below 1 Ω
    2.5 rotations to the left
    2.5 rotations to the right
    z4-3 (-DP) - H30-11 (-DP)
    		Center
    		Below 1 Ω
    2.5 rotations to the left
    2.5 rotations to the right

  1. After setting the spiral with sensor cable sub-assembly to the center position, rotate the spiral with sensor cable sub-assembly 2.5 times clockwise. Then while rotating the spiral with sensor cable sub-assembly 5 times counterclockwise, measure the resistance as shown in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    z4-8 (EAU) - H30-3 (EAU)
    		Always
    		Below 1 Ω
    z4-5 (IL+2) - H30-13 (IL+2)
    		Always
    		Below 1 Ω
    z4-3 (-DP) - H30-11 (-DP)
    		Always
    		Below 1 Ω

    NOTICE:
    1. The spiral with sensor cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral with sensor cable sub-assembly may prevent the airbag from deploying. Refer to the pages shown in the brackets.
    2. As the spiral with sensor cable sub-assembly may break, do not rotate the spiral with sensor cable sub-assembly more than the specified amount.

    HINT:
    1. Removal (Click here)
    2. Installation (Click here)

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



NG
REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY (Click here)
OK


5.CHECK HARNESS AND CONNECTOR

  1. Disconnect the radio receiver assembly and spiral with sensor cable sub-assembly connectors.

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

    Standard Resistance:
    for 10 Speakers 
    Tester Connection
    		Condition
    		Specified Condition
    H30-11 (-DP) - Body ground
    		Always
    		Below 1 Ω
    H52-6 (SWG) - H30-3 (EAU)
    		Always
    		Below 1 Ω
    H52-6 (SWG) - Body ground
    		Always
    		10 kΩ or higher
    for 6 Speakers 
    Tester Connection
    		Condition
    		Specified Condition
    H30-11 (-DP) - Body ground
    		Always
    		Below 1 Ω
    H47-23 (SWG) - H30-3 (EAU)
    		Always
    		Below 1 Ω
    H47-23 (SWG) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)  

6.CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)

  1. Disconnect the radio receiver assembly connector.

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

    Standard Voltage:
    for 10 Speakers 
    Tester Connection
    		Condition
    		Specified Condition
    H51-2 (ILL+) - Body ground
    		Light control switch in the tail or head position
    		11 to 14 V
    for 6 Speakers 
    Tester Connection
    		Condition
    		Specified Condition
    H48-10 (ILL+) - Body ground
    		Light control switch in the tail or head position
    		11 to 14 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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

  1. Disconnect the radio receiver assembly and combination meter assembly connectors.

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

    Standard Resistance:
    for 10 Speakers 
    Tester Connection
    		Condition
    		Specified Condition
    H51-12 (ILL-) - H19-10 (ILL-)
    		Always
    		Below 1 Ω
    H51-12 (ILL-) - Body ground
    		Always
    		10 kΩ or higher
    for 6 Speakers 
    Tester Connection
    		Condition
    		Specified Condition
    H49-5 (ILL-) - H19-10 (ILL-)
    		Always
    		Below 1 Ω
    H49-5 (ILL-) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)