DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK ILLUMINATION
CHECK HARNESS AND CONNECTOR (BATTERY - SPIRAL CABLE)
INSPECT STEERING PAD SWITCH ASSEMBLY (STEERING PAD SIDE)
INSPECT SPIRAL CABLE SUB-ASSEMBLE
CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - RADIO RECEIVER)
CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MAIN BODY ECU)
AUDIO AND VISUAL SYSTEM (w/o Navigation System) - Illumination Circuit
DESCRIPTION
Power is supplied to the radio receiver and steering pad switch illumination when the light control switch is in the tail or head position.
WIRING DIAGRAM
INSPECTION PROCEDURE
The vehicle is equipped with an SRS (Supplemental Restraint System) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the Precaution for the SRS ().
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
Check if the illumination for the multi-display, steering pad switch, glove box light, cigarette lighter, or others (seat heater switch, front seat memory 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. | A |
| Illumination comes on for all components except radio receiver. | B |
| No illumination comes on for radio receiver, multi-display, glove box light, front seat memory switch, cigarette lighter, etc. | C |
| 2.CHECK HARNESS AND CONNECTOR (BATTERY - SPIRAL CABLE) |
Disconnect the E12 cable connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Condition | Specified Condition |
| E12-12 (IL+2) - Body ground | Always | 11 to 14 V |
Text in Illustration| *1 | Front view of wire harness connector
(to Spiral Cable) |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| 3.INSPECT STEERING PAD SWITCH ASSEMBLY (STEERING PAD SIDE) |
Disconnect the z36 switch connector.
Apply battery voltage to the terminals of the connector, and check the LED illumination condition.
OK| Measurement Condition | Specified Condition |
Battery positive (+) → Terminal 5 (IL+2)
Battery negative (-) → Terminal 8 (EAU) | Light illuminates |
| | REPLACE STEERING PAD SWITCH ASSEMBLY ()
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| 4.INSPECT SPIRAL CABLE SUB-ASSEMBLE |
Text in Illustration| *1 | Vehicle Side | *2 | Steering Pad Switch Side |
Remove the spiral cable ().
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| E12-12 (IL+2) - z36-5 (IL+2) | Spiral cable is turned 2.5 rotations counterclockwise | Below 1 Ω |
| Spiral cable is centered |
| Spiral cable is turned 2.5 rotations clockwise |
| E12-4 (EAU) - z36-8 (EAU) | Spiral cable is turned 2.5 rotations counterclockwise | Below 1 Ω |
| Spiral cable is centered |
| Spiral cable is turned 2.5 rotations clockwise |
- The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to read the Precaution for the SRS ().
| | REPLACE SPIRAL CABLE SUB-ASSEMBLY ()
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| 5.CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - RADIO RECEIVER) |
Disconnect the F19 radio receiver connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| F19-6 (SWG) - E12-4 (EAU) | Always | Below 1 Ω |
| F19-6 (SWG) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| OK | |
| |
| PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE ()
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| 6.CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MAIN BODY ECU) |
Disconnect the F19 receiver connector.
Disconnect the E2 main body ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| F19-20 (ADIM) - E2-16 (ACAN) | Always | Below 1 Ω |
| F19-20 (ADIM) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| OK | |
| |
| REPLACE RADIO RECEIVER ASSEMBLY ()
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