Diagnostic Test

1) DTC IS ACTIVE

NOTE: Refer to the following table when diagnosing speed control switch voltage DTCs.

-	Switch 1 Voltage (pin A27)	Switch 2 Voltage (pin A26)
On/Off - Min.	0.5882	3.5294
On/Off - Max.	1.1373	3.9216
Set - Min.	3.1569	1.1765
Set - Max.	3.5686	1.5686
Cancel - Min.	1.5882	2.8431
Cancel - Max.	2.0000	3.2549
Accel - Min.	3.8824	2.0392
Accel - Max.	4.1765	2.4706

Start the engine and allow it to idle for at least 60 seconds.

WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.

NOTE: It may be necessary to test drive the vehicle and operate the speed control in order for this DTC to set.

With a scan tool, select View DTCs.

Is the DTC Active at this time?

Yes

Go to step 2).

Refer to *CHECKING FOR AN INTERMITTENT DTC diagnostic procedure.

2) SPEED CONTROL SWITCH

Fig 1: Connecting Jumper Wire Between S/C Signal 2 Circuit And S/C Switch Ground Circuit In Control Switch Harness Connector
Courtesy of CHRYSLER LLC

Turn the ignition off.

Remove the Speed Control Switch in accordance with the Service Information.

Connect a jumper wire between the (V72) S/C Signal 2 circuit and the (V937) S/C Switch Ground circuit in the Speed Control Switch harness connector.

Turn the ignition on.

With a scan tool, read the (V72) S/C Signal 2 voltage.

NOTE: The (V72) S/C Signal 2 voltage should be below.2 volts with the jumper wire in place.

Is the (V72) S/C Signal 2 voltage below.2 volts with the jumper wire in place?

Yes
1. Replace the Speed Control Switch in accordance with the Service Information.
2. Perform PCM VERIFICATION TEST .
No
1. Go to step 3).
3) CLOCKSPRING
Turn the ignition off.

Disconnect the C5 Steering Control Module (SCM) connector.

Connect a jumper wire between the (V72) S/C Signal 2 circuit and the (V937) S/C Switch Ground circuit in the C5 Steering Control Module (SCM) connector, not at the harness connector.

Turn the ignition on.

With a scan tool, read the (V72) S/C Signal 2 voltage.

NOTE: The (V72) S/C Signal 2 voltage should be below.2 volts with the jumper wire in place.

Is the (V72) S/C Signal 2 voltage below.2 volts with the jumper wire in place?

Yes
1. Replace the Clockspring in accordance with the Service Information.
2. Perform PCM VERIFICATION TEST .
No
1. Go to step 4).
4) STEERING CONTROL MODULE (SCM)

Fig 2: Connecting Jumper Wire Between S/C Signal 2 Circuit And S/C Switch Ground Circuit In SCM C2 Harness Connector
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the C2 Steering Control Module (SCM) connector.

Connect a jumper wire between the (V72) S/C Signal 2 circuit and the (V937) S/C Switch Ground circuit in the C2 Steering Control Module (SCM) harness connector.

Turn the ignition on.

With a scan tool, read the (V72) S/C Signal 2 voltage.

NOTE: The (V72) S/C Signal 2 voltage should be below.2 volts with the jumper wire in place.

Is the (V72) S/C Signal 2 voltage below.2 volts with the jumper wire in place?

Yes
1. Replace the Steering Control Module (SCM) in accordance with the Service Information.
2. Perform PCM VERIFICATION TEST .
No
1. Go to step 5).
5) (V72) S/C SIGNAL 2 CIRCUIT SHORTED TO VOLTAGE

Fig 3: Measuring Voltage Of (V72) S/C Signal 2 Circuit In The Steering Control Module (SCM) Harness Connector
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the C3 Powertrain Control Module (PCM) harness connector.

Turn the ignition on.

Measure the voltage of the (V72) S/C Signal 2 circuit in the C2 Steering Control Module (SCM) harness connector.

Is there any voltage present?

Yes
1. Repair the short to voltage in the (V72) S/C Signal 2 circuit.
2. Perform PCM VERIFICATION TEST .
No
1. Go to step 6).
6) (V72) S/C SIGNAL 2 CIRCUIT OPEN

Fig 4: Measuring Resistance Of S/C Signal Circuits
Courtesy of CHRYSLER LLC

Measure the resistance of the (V72) S/C Signal 2 circuit between the S/C Switch harness connector and the appropriate terminal of special tool #8815.

Is the resistance below 5.0 ohms?

Yes
1. Go to step 7).
No
1. Repair the open in the (V72) S/C Signal 2 circuit.
2. Perform PCM VERIFICATION TEST .
7) (V937) S/C SWITCH GROUND CIRCUIT OPEN

Fig 5: Checking S/C Switch Ground Circuit For Open
Courtesy of CHRYSLER LLC

Measure the resistance of the (V937) S/C Switch Ground circuit between the S/C Switch harness connector and the appropriate terminal of special tool #8815.

Is the resistance below 5.0 ohms?

Yes
1. Go to step 8).
No
1. Repair the open in the (V937) S/C Switch Ground circuit.
2. Perform PCM VERIFICATION TEST .
8) POWERTRAIN CONTROL MODULE (PCM)
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Speed Control Switch and the Powertrain Control Module (PCM).

Look for any chafed, pierced, pinched, or partially broken wires.

Verify that there is good pin to terminal contact in the Switch and Powertrain Control Module connectors.

Look for broken, bent, pushed out or corroded terminals.

Refer to any Technical Service Bulletins that may apply.

Were any problems found?

Yes
1. Repair as necessary.
2. Perform PCM VERIFICATION TEST .
No
1. Replace the Powertrain Control Module (PCM) in accordance with the Service Information.
2. Perform PCM VERIFICATION TEST .