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Home >> Jeep >> 2021 >> Grand Cherokee L Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 19 (5.7L - DTCS P1496 To P2166) >> DTC Troubleshooting >> P1593-Speed Control Switch 1/2 Stuck >> Diagnostic Test

Diagnostic Test

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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.
  2. With the scan tool, read DTCs and record on the repair order.

    Is the DTC active or pending?

    Yes 

    • Visually and physically inspect the wiring harness between the Speed Control Switch harness connector and the SCCM harness connector. Repair any damaged wires, connectors, and open/spread terminals. If harness is OK replace the Speed Control Switch in accordance with the Service Information. Refer to SWITCH, SPEED CONTROL, REMOVAL AND INSTALLATION .
    • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

    No