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Home >> Jeep >> 2014 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 3.6L - DTCS P0461 To P0652 >> Diagnosis And Testing >> P0580-Speed Control Switch 1 Circuit Low >> Diagnostic Test

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 

  2. RIGHT STEERING WHEEL SWITCH 
    1. Turn the ignition off.
    2. Remove the Driver Air Bag in accordance with the Service Information. Refer to AIR BAG, DRIVER, 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 

      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 in accordance with the Service Information.
      • Perform the PCM VERIFICATION TEST. Refer to 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 

      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. Refer to 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. Refer to 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 

      No