P0581-S/C SWITCH 1 SIGNAL CIRCUIT VOLTAGE TOO HIGH
P0581-S/C SWITCH 1 SIGNAL CIRCUIT VOLTAGE TOO HIGH
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For a complete wiring diagram, refer to the Wiring Information.
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When Monitored:
With the ignition on.
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Set Condition:
The S/C Signal 1 is above a calibrated threshold for 0.06 second.
Possible Causes |
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| (V71) S/C SIGNAL 1 CIRCUIT SHORTED TO VOLTAGE |
| (V71) S/C SIGNAL 1 CIRCUIT OPEN/HIGH RESISTANCE |
| (V937) S/C SWITCH RETURN CIRCUIT OPEN/HIGH RESISTANCE |
| CLOCKSPRING |
| STEERING WHEEL JUMPER HARNESS |
| SPEED CONTROL SWITCH |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
| 1. | Ignition on, engine not running. |
| 2. | With the scan tool, Clear DTCs in the PCM. |
| 3. | Start the engine and test drive the vehicle. |
| 4. | During the test drive select each of the speed control switch positions. |
| 5. | With the scan tool, select View DTCs. |
Is the status Active for this DTC?
Yes
- Go To 2
No
- Perform the INTERMITTENT DTC diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
2. CHECK THE (V71) S/C SIGNAL 1 CIRCUIT FOR A SHORT TO VOLTAGE
| 1. | Turn the ignition off. |
| 2. | Disconnect the Speed Control Switch harness connector. |
| 3. | Turn the ignition on. |
| 4. | Measure the voltage of the (V71) S/C Signal 1 circuit in the Speed Control Switch harness connector. |
Is the voltage above 5.2 Volts?
Yes
- Repair the short to voltage in the (V71) S/C Signal 1 circuit.
- Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
- Go To 3
| 1. | Connect a jumper between the (V71) S/C Signal 1 circuit and the (V937) Switch Return circuit at the Speed Control Switch harness connector. |
| 2. | With the scan tool, select View DTCs. |
Does the P0580-S/C SWITCH 1 SIGNAL CIRCUIT VOLTAGE TOO LOW set as active or pending with the jumper in place?
Yes
- 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).
No
- Go To 4
4. STEERING WHEEL JUMPER HARNESS
| 1. | Turn the ignition off. |
| 2. | Disconnect the Clockspring C8 harness connector. |
| 3. | Connect a jumper between the (V71) S/C Signal 1 circuit and the (V937) Switch Return circuit at the Clockspring terminals, not the harness connector. |
| 4. | Turn the ignition on. |
| 5. | With the scan tool, select View DTCs. |
Does the P0580-S/C SWITCH 1 SIGNAL CIRCUIT VOLTAGE TOO LOW set as active or pending with the jumper in place?
Yes
- Replace the Steering Wheel Jumper Harness in accordance with the service information.
- Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
- Go To 5
| 1. | Turn the ignition off. |
| 2. | Disconnect the Clockspring C2 harness connector. |
| 3. | Connect a jumper between the (V71) S/C Signal 1 circuit (V937) Switch Return circuit at the Clockspring C2 harness connector. |
| 4. | Turn the ignition on. |
| 5. | With the scan tool, select View DTCs. |
Does the P0580-S/C SWITCH 1 SIGNAL CIRCUIT VOLTAGE TOO LOW set as active or pending with the jumper in place?
Yes
- Replace the Clockspring harness in accordance with the service information.
- Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
- Go To 6
6. CHECK THE (V71) S/C SIGNAL 1 CIRCUIT FOR AN OPEN/HIGH RESISTANCE
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| 1. | Turn the ignition off. |
| 2. | Disconnect the PCM C2 harness connector. |
| 3. | Measure the resistance of the (V71) S/C Signal 1 circuit between the Clockspring C2 harness connector to the PCM C2 harness connector. |
Is the resistance below 5.0 Ohms?
Yes
- Go To 7
No
- Repair the (V71) S/C Signal 1 circuit for an open or high resistance.
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Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM)
- Standard Procedure).
7. CHECK THE (V937) S/C SWITCH RETURN CIRCUIT FOR AN OPEN/HIGH RESISTANCE
 |
| 1. | Measure the resistance of the (V937) Switch Return circuit between the Clockspring C2 harness connector to the PCM C2 harness connector. |
Is the resistance below 5.0 Ohms?
Yes
- Go To 8
No
- Repair the (V937) S/C Switch Return circuit for an open or high resistance.
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Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM)
- Standard Procedure).
| 1. | Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Speed Control Switch and the Powertrain Control Module. |
| 2. | Look for any chafed, pierced, pinched, or partially broken wires. |
| 3. | Look for broken, bent, pushed out or corroded terminals. |
| 4. | Perform any Technical Service Bulletins that may apply. |
Were any problems found?
Yes
- Repair as necessary.
- Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
- Replace the Powertrain Control Module in accordance with the service information.
- Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).