P0578-S/C SWITCH 1 SIGNAL CIRCUIT STUCK SWITCH
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For a complete wiring diagram, refer to the Wiring Information.
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When Monitored:
With the ignition on and no other Speed Control Switch DTCs present.
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Set Condition:
The S/C Signal 1 indicates that a switch is pressed continuously for 60 seconds.
Possible Causes |
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| SPEED CONTROL SWITCH |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
SPEED CONTROL SWITCH STATUS
| 1. | Turn the ignition on. |
| 2. | Using the scan tool, monitor the Speed Control Switch status. |
| 3. | Press each button while noting the Speed Control Switch 1 status on the scan tool. |
Did the Speed Control Switch status change when each button is pressed?
Yes
- Perform the INTERMITTENT DTC diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
- Replace the Speed Control Switch in accordance with the service information.
- Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).