DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT STEERING PAD SWITCH ASSEMBLY
INSPECT SPIRAL CABLE SUB-ASSEMBLY
CHECK HARNESS AND CONNECTOR (MULTI-MEDIA NODULE RECEIVER ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY)
NAVIGATION SYSTEM - Steering Pad Switch Circuit
DESCRIPTION
This circuit sends an operation signal from the steering pad switch assembly to the multi-media module receiver assembly.
If there is an open in the circuit, the audio system cannot be operated using the steering pad switch assembly.
If there is a short in the circuit, the same condition as when a switch is continuously depressed occurs.
Therefore, the multi-media module receiver assembly cannot be operated using the steering pad switch assembly, and also the multi-media module receiver assembly itself cannot function.
WIRING DIAGRAM
INSPECTION PROCEDURE
- 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 ().
| 1.INSPECT STEERING PAD SWITCH ASSEMBLY |
Remove the steering pad switch assembly ().
Inspect the steering pad switch assembly ().
| | REPLACE STEERING PAD SWITCH ASSEMBLY ()
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| 2.INSPECT SPIRAL CABLE SUB-ASSEMBLY |
Remove the spiral cable sub-assembly ().
Inspect the spiral cable sub-assembly ().
| | REPLACE SPIRAL CABLE SUB-ASSEMBLY ()
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| 3.CHECK HARNESS AND CONNECTOR (MULTI-MEDIA NODULE RECEIVER ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY) |
Disconnect the F77 multi-media module receiver assembly connector.
Disconnect the E12 spiral cable sub-assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| F77-30 (SW1) - E12-6 (AU1) | Always | Below 1 Ω |
| F77-31 (SW2) - E12-5 (AU2) | Always | Below 1 Ω |
| F77-32 (SWG) - E12-4 (EAU) | Always | Below 1 Ω |
| F77-30 (SW1) - Body ground | Always | 10 kΩ or higher |
| F77-31 (SW2) - Body ground | Always | 10 kΩ or higher |
| F77-32 (SWG) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| OK | |
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| PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE ()
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