P0580

P0580-SPEED CONTROL SWITCH 1 CIRCUIT LOW

For a complete wiring diagram, refer to the Wiring Information.





Theory of Operation

The Speed Control Switches are located in the Right Steering Wheel Switch. The Right Steering Wheel Switch is hardwired to the Powertrain Control Module (PCM) via the clockspring pass-through within the Steering Column Control Module (SCCM). The SCCM is located near the top of the steering column below the steering wheel. The SCCM includes the steering column shroud, the Steering Angle Sensor (SAS), the Clockspring, the Multi-function Switch, a Steering Column Power Tilt and Telescope Switch (if equipped), and a trim cover.

- When Monitored:
Continuously with the ignition on.

- Set Condition:
Fault signifies when the switch voltage is shorted low.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding PCM Pre-Diagnostic Troubleshooting Procedure.

Diagnostic Test

1. CHECK FOR AN ACTIVE DTC

WARNING:
Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

WARNING:
Do not place an intact non-deployed airbag face down on a hard surface, the airbag propels into the air if accidentally deployed. Failure to follow these instructions may result in possible serious or fatal injury.

1. Turn the ignition on, engine not running.
2. With the scan tool, read DTCs

Does the scan tool display this DTC as active?

Yes

- Go To 2.

No

- Perform the INTERMITTENT DTC diagnostic procedure PCM Intermittent Condition Test.

2. RIGHT STEERING WHEEL SWITCH
1. Turn the ignition off.
2. Remove the Driver Air Bag Driver Air Bag - Removal.
3. Disconnect the Right Steering Wheel Switch harness connector.
4. Turn the ignition on, engine not running.
5. Measure the voltage of the (V71/V37) S/C Signal 1 circuit at the Right Steering Wheel Switch harness connector.

Is the voltage between 4.8 to 5.2 volts?

Yes

- Replace the Right Steering Wheel Switch Speed Control Switch - Removal.
- Perform the PCM VERIFICATION TEST Powertrain Verification Test.

No

- Go To 3.

3. STEERING WHEEL JUMPER HARNESS
1. Disconnect the SCM C6 harness connector.
2. Measure the voltage of the (V71/V37) S/C Signal 1 circuit at the SCM C6 component side.

Is the voltage between 4.8 to 5.2 volts?

Yes

- Replace the Steering Wheel Jumper harness.
- Perform the PCM VERIFICATION TEST Powertrain Verification Test.

No

- Go To 4.

4. CLOCKSPRING
1. Disconnect the SCM C2 harness connector.
2. Measure the voltage of the (V71/V37) S/C Signal 1 circuit at the SCM C2 harness connector.

Is the voltage between 4.8 to 5.2 volts?

Yes

- Replace the Clockspring Clockspring - Removal.
- Perform the PCM VERIFICATION TEST Powertrain Verification Test.

No

- Go To 5.

5. CHECK FOR THE (V71/V37) S/C SIGNAL 1 CIRCUIT SHORTED TO THE (V937) S/C SWITCH GROUND CIRCUIT
1. Turn the ignition off.
2. Measure the resistance between the (V71/V37) S/C Signal 1 circuit and the (V937) S/C Switch Ground circuit at the SCM C2 harness connector.

Is the resistance above 10k Ohms?

Yes

- Go To 6.

No

- Repair the short between the (V71/V37) S/C Signal 1 circuit and the (V937) S/C Switch Ground circuit in the wiring harness.
- Perform the PCM VERIFICATION TEST Powertrain Verification Test.

6. CHECK THE (V71/V37) S/C SIGNAL 1 CIRCUIT FOR A SHORT TO GROUND
1. Measure the resistance between ground and the (V71/V37) S/C Signal 1 circuit at the SCM C2 harness connector.

Is the resistance above 10k Ohms?

Yes

- Go To 7.

No

- Repair the (V71/V37) S/C Signal 1 circuit for a short to ground.
- Perform the PCM VERIFICATION TEST Powertrain Verification Test.

7. POWERTRAIN CONTROL MODULE
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Right Steering Wheel 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 Powertrain Verification Test.

No

- Replace the Powertrain Control Module Powertrain Control Module - Removal.
- Perform the PCM VERIFICATION TEST Powertrain Verification Test.