P1593 Speed Control Switch 1/2 Stuck

P1593 code - The speed control switch is hardware to 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-switch, a steering column power tilt and telescope switch (if equipped), and a trim cover. The speed control messages are bussed to the Powertrain Control Module (PCM) via the Can Bus. Set condition this DTC is fault signifies when the switch voltage does not register a valid cruise position.

Possible causes
- Speed Control Switch

Diagnostic test P1593 code

Check for an active DTC
Turn the ignition off disconnect the 12volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury. Do not place an intact non-deployed airbag face doen on a hard surface, the airbag propels into the air if accidentially deployed. Filure to follow these instructions may result in possible serious or fatal injury.
Turn the ignition on, with the scan tool read and record on the repair order.

Does the scan tool display this DTC as active?

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 ok, proceed with this test.
Replace the speed control switch.

No, perform the PCM intermittent condition.

Test complete.

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