This circuit sends an operation signal from the steering pad switch assembly to the navigation 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 navigation receiver assembly cannot be operated using the steering pad switch assembly, also the navigation receiver assembly itself will not function.
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.
Disconnect the I169 navigation receiver assembly connector.
Measure the resistance according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I169-21 (SW1) - I169-23 (SWG) | No switch pushed | 95 to 105 kΩ |
| Seek+ switch pushed | Below 2.5 Ω | |
| Seek- switch pushed | 313 to 345 Ω | |
| Volume+ switch pushed | 950 to 1050 Ω | |
| Volume- switch pushed | 2955 to 3265 Ω | |
| I169-22 (SW2) - I169-23 (SWG) | No switch pushed | 95 to 105 kΩ |
| MODE/HOLD switch pushed | Below 2.5 Ω | |
| Telephone switch pushed | 950 to 1050 Ω | |
| Voice switch pushed | 2955 to 3265 Ω |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Inspect the steering pad switch assembly.
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Inspect the spiral cable sub-assembly.
| Proceed to |
|---|
| OK |
| NG |
OK
NG