Jump to content
  • P0580 Low Voltage Detected At The Speed Control Switch

       (0 reviews)

    Mopar1973Man

    P0580 LOW VOLTAGE DETECTED AT THE SPEED CONTROL SWITCH

    When Monitored and Set Condition:

    When Monitored: While the ignition is on
    Set Condition: Speed control MUX switch below 1.0 volts for 5 seconds.

    POSSIBLE CAUSES

    • S/C WIRING HARNESS OBSERVABLE PROBLEM
    • S/C SWITCH (ON/OFF)
    • CLOCKSPRING SHORTED TO GROUND
    • S/C SWITCH (RESUME/ACCEL)
    • S/C SWITCH SIGNAL CIRCUIT SHORTED TO GROUND
    • S/C SIGNAL CIRCUIT SHORTED TO SENSOR GROUND
    • ECM

    DIAGNOSTIC PROCEDURE

    1. Turn the ignition on. With the DRBIII®, read the S/C Switch volts status in the ECM. Is the S/C Switch voltage below 1.0 volt?
      Yes --> Go To 3
      No --> Go To 2
    2. Turn the ignition off. Using the Schematics as a guide, inspect the Wiring and Connectors. Were any problems found?
      Yes --> Repair as necessary. Perform POWERTRAIN VERIFICATION TEST VER - 4 (DIESEL).
      No --> Go To 3
    3. Turn the ignition off. Disconnect the S/C ON/OFF Switch harness connector.
      NOTE: Check connectors - Clean/repair as necessary.
      Turn the ignition on. With the DRBIII® in Sensors, read the S/C Switch volts in the ECM. Did the S/C Switch volts change to 5.0 volts?
      Yes --> Replace the S/C ON/OFF Switch. Perform POWERTRAIN VERIFICATION TEST VER - 4 (DIESEL).
      No --> Go To 4
    4. Turn the ignition off. Disconnect the S/C RESUME/ACCEL Switch harness connector.
      NOTE: Check connectors - Clean/repair as necessary.
      Ignition on, engine not running. With the DRBIII® in Sensors, read the S/C Switch volts in the ECM. Did the S/C Switch volts go above 4.0 volts?
      Yes --> Replace the Resume/Accel Switch. Perform POWERTRAIN VERIFICATION TEST VER - 4 (DIESEL).
      No --> Go To 5
    5. Turn the ignition off. Disconnect the clockspring 6-way harness connector (instrument panel wiring side). Turn the ignition on. With the DRBIII® in Sensors, read the S/C Switch volts in the ECM. Did the S/C Switch volts change to 5.0 volts?
      Yes --> Replace the Clockspring. Perform POWERTRAIN VERIFICATION TEST VER - 4 (DIESEL).
      No --> Go To 6
    6. Turn the ignition off. Disconnect the S/C ON/OFF Switch harness connector. Disconnect the ECM harness connectors.
      NOTE: Check connectors - Clean/repair as necessary.
      Measure the resistance between the S/C Switch Signal circuit and ground (B-) at S/C ON/OFF Switch harness connector. Is the resistance below 5.0 ohms?
      Yes --> Repair S/C Switch Signal Circuit for a short to ground. Perform POWERTRAIN VERIFICATION TEST VER - 4 (DIESEL).
      No --> Go To 7
    7. Measure the resistance between the S/C Signal Circuit and the Sensor Ground Circuit at the ON/OFF switch harness connector. Is the resistance below 5.0 ohms?
      Yes --> Repair S/C Signal Circuit shorted to Sensor Ground. Perform POWERTRAIN VERIFICATION TEST VER - 4 (DIESEL).
      No --> Replace and program the ECM in accordance with the Service Information. Perform POWERTRAIN VERIFICATION TEST VER - 4 (DIESEL).

    User Feedback

    There are no reviews to display.


×
×
  • Create New...

Advertisements and Ad Blockers

Mopar1973Man.Com uses the income from advertisers to pay the bills on the website. Please whitelist your ad blockers for Mopar1973Man.Com this will allow advertisements to display on our pages but allows you to still block ads on the other websites you visit. 

 

image.png

I will whitelist Mopar1973Man.Com