2014 Jeep Wrangler JK Factory Service Manual 28 - DTC-Based Diagnostics

P0593-SPEED CONTROL SWITCH 2 CIRCUIT HIGH

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.


Possible Causes

S/C SIGNAL 2 CIRCUIT
SPEED CONTROL SWITCH (RIGHT STEERING WHEEL SWITCH)
CLOCKSPRING

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).


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


No


2. CHECK THE (V72/V38) S/C SIGNAL 2 CIRCUIT FOR A SHORT TO VOLTAGE

1. Turn the ignition off.
2. Remove the Driver Air Bag in accordance with the Service Information (Refer to 10 - Restraints/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 (V72/V38) S/C Signal 2 circuit at the Right Steering Wheel Switch harness connector.


Is the voltage above 5.2 volts?

Yes


No


3. RIGHT STEERING WHEEL SWITCH

1. Connect a jumper between the (V72V38) S/C Signal 2 circuit and the (V937) S/C Switch Ground circuit at the Right Steering Wheel Switch harness connector.
2. With the scan tool, select View DTCs.


Does the P0592-SPEED CONTROL SWITCH 2 CIRCUIT LOW set as active or pending with the jumper in place?

Yes


No


4. STEERING WHEEL JUMPER HARNESS

1. Turn the ignition off.
2. Disconnect the SCM C6 harness connector.
3. Connect a jumper between the (V72V38) S/C Signal 2 circuit and the (V937) S/C Switch Ground circuit at the SCM C6 component side.
4. Turn the ignition on, engine not running.
5. With the scan tool, select View DTCs.


Does the P0592-SPEED CONTROL SWITCH 2 CIRCUIT LOW set as active or pending with the jumper in place?

Yes


No


5. CLOCKSPRING

1. Turn the ignition off.
2. Disconnect the SCM C2 harness connector.
3. Connect a jumper between the (V72V38) S/C Signal 2 circuit and the (V937) S/C Switch Ground circuit at the SCM C2 harness connector.
4. Turn the ignition on, engine not running.
5. With the scan tool, select View DTCs.


Does the P05892-SPEED CONTROL SWITCH 2 CIRCUIT LOW set as active or pending with the jumper in place?

Yes


No


6. CHECK THE (V72V38) S/C SIGNAL 2 CIRCUIT FOR AN OPEN/HIGH RESISTANCE

1. Turn the ignition off.
2. Disconnect the PCM C1 harness connector.
3. Measure the resistance of the (V72/V38) S/C Signal 2 circuit between the SCM C2 harness connector and the PCM C1 harness connector.


Is the resistance below 5.0 Ohms?

Yes


No


7. CHECK THE (V937) S/C SWITCH GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE

1. Measure the resistance of the (V937) S/C Switch Ground circuit between the SCM C2 harness connector and the PCM C1 harness connector.


Is the resistance below 5.0 Ohms?

Yes


No


8. 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