Audio And Visual System (For Radio And Display Type) Illumination Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK ILLUMINATION

CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)

INSPECT STEERING PAD SWITCH ASSEMBLY

INSPECT SPIRAL CABLE SUB-ASSEMBLY

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY AND BODY GROUND)

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - BATTERY)

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - BODY GROUND)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. The vehicle is equipped with a 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.
   

HINT:

When replacing the radio and display receiver assembly, it is necessary to perform the vehicle contract setting for Connected Services (w/ Connected Services Function).

1. Check if the illumination for the radio and display receiver assembly, steering pad switch assembly or others (hazard switch etc.) comes on when the headlight dimmer 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 and display receiver assembly.	B
   No illumination comes on (radio and display receiver assembly, steering pad switch, hazard switch, heater control switch, etc.).	C

1. Disconnect the spiral cable sub-assembly connector.
   

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   E122-13 (IL+2) - Body ground	Light control switch in the tail or head position	11 to 14 V

   Text in Illustration

   *a	Front view of wire harness connector (to Spiral Cable Sub-assembly)

1. Remove the steering pad switch assembly (Click here).
   

2. Inspect the steering pad switch assembly (Click here).
   

1. Remove the spiral cable sub-assembly (Click here).
   

2. Inspect the spiral cable sub-assembly (Click here).
   

1. Disconnect the F124 radio and display receiver assembly connectors.
   

2. Disconnect the E122 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
   F124-23 (SWG) - E122-3 (EAU)	Always	Below 1 Ω
   E122-2 (ECC) - Body ground	Always	Below 1 Ω
   F124-23 (SWG) - Body ground	Always	10 kΩ or higher

1. Disconnect the radio and display receiver assembly connector.
   

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   F120-10 (ILL+) - Body ground	Light control switch in the tail or head position	11 to 14 V

1. Disconnect the F122 radio and display receiver assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   F122-5 (ILL-) - Body ground	Always	Below 1 Ω