Diagnostic Test

1) SPEED CONTROL SWITCH STATUS
NOTE: This DTC is a two trip fault. If the scan tool indicates a one trip failure, the possible cause may have been the customer pressing both switches simultaneously. Test drive the vehicle and activate the Speed Control system. If the DTC matures to an active fault a repair is necessary.

Start the engine.

With a scan tool, monitor each which function for the Speed Control Switches.

Press and release each Speed Control Button.

- Resume/Accel

- Cancel

- Decel (Coast)

- On/Off

- Set

Does each switch function change status when pressing and then depressing each switch?

Yes
1. Refer to INTERMITTENT CONDITION Diagnostic Procedure.
No
1. Go to 2).
2) SPEED CONTROL SWITCHES
Turn the ignition off.

Remove the Speed Control Switches from the steering wheel.

Measure the resistance across each Speed Control Switch.

Monitor the ohmmeter while pressing each function button on each switch.

The following resistance specs are taken between terminals (V38) S/C Switch No.2 Signal and (K914) S/C Switch Return circuits of the Switch when holding the switch button in the following position.

Not pressing any switch - 20.5 kohms

On/Off - 8.87 kohms

Set - 0.825 kohms

Coast - 0.47 kohms

Cancel - 3.92 kohms

Resume/Accel - 1.87 kohms

The following resistance specs are taken between terminals (V37) S/C Switch No.1 Signal and (K914) S/C Switch Return circuits of the Switch when holding the switch button in the following position

Not pressing any switch - 20.5 kohms

On/Off - 0.47 kohms

Set - 5.49 kohms

Coast - 2.94 kohms

Cancel - 1.24 kohms

Resume/Accel - 15.4 kohms

Does the function on the Speed Control Switches have the correct resistance value?

Yes
1. Go to 3).
No
1. Replace the Speed Control Switch that had the incorrect resistance value.
2. Perform POWERTRAIN VERIFICATION TEST .
3) (V38) S/C SWITCH NO.2 SIGNAL CIRCUIT SHORTED TO VOLTAGE

Fig 1: Checking For Short To Voltage In No. 2 Signal Circuit
Courtesy of CHRYSLER LLC

Disconnect the C3 PCM harness connector.

Disconnect the C3 Clockspring harness connector.

Ignition on, engine not running.

Measure the voltage of the (V38) S/C Switch No.2 Signal circuit in the S/C Switch harness connectors.

Is there any voltage present?

Yes
1. Repair the short to voltage in the (V38) S/C Switch No.2 Signal circuit between the Switch and Clockspring.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go to 4).
4) (V38) S/C SWITCH NO.2 SIGNAL CIRCUIT SHORTED TO VOLTAGE

Fig 2: Checking For Short To Voltage In Speed Control Switch No. 2 Signal Circuit
Courtesy of CHRYSLER LLC

Disconnect the C1 Clockspring harness connector per Service Information.

Ignition on, engine not running.

Measure the voltage on the (V38) S/C Switch No.2 Signal circuit in the C1 Clockspring harness connector.

Is there any voltage present?

Yes
1. Repair the short to voltage in the (V38) S/C Switch No.2 Signal circuit between the Clockspring and PCM.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go to 5).
5) CLOCKSPRING

Fig 3: Checking Resistance Of Switch Return Circuit Between C1 & C4 Clockspring Connections
Courtesy of CHRYSLER LLC

Fig 4: Measuring Resistance Of Switch Return Circuit Between C1 & C4 Clockspring Connections
Courtesy of CHRYSLER LLC

Turn the ignition off.

Measure the resistance of the (V38) S/C Switch No.2 Signal circuit between the C1 and C3 Clockspring connections.

Measure the resistance of the (K914) Switch Return circuit between the C1 and C4 Clockspring connections.

Is the resistance above 5.0 ohms?

Yes
1. Replace the Clockspring per Service Information.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go to 6).
6) (V38) S/C SWITCH NO.2 SIGNAL CIRCUIT OPEN

Fig 5: Checking For Open In Speed Control Switch No. 2 Signal Circuit
Courtesy of CHRYSLER LLC

NOTE: The measurement must be taken from both Speed Control Switch harness connectors.

Measure the resistance of the (V38) S/C Switch No.2 Signal circuit from both Speed Control harness connectors to the C3 Clockspring harness connector.

Is the resistance below 5.0 ohms for both measurements?

Yes
1. Go to 7).
No
1. Repair the open in the (V38) S/C Switch No.2 Signal circuit between the Switch and Clockspring.
2. Perform POWERTRAIN VERIFICATION TEST .
7) (V38) S/C SWITCH NO.2 SIGNAL CIRCUIT OPEN

Fig 6: Checking Speed Control Switch No. 2 Signal Circuit For Open
Courtesy of CHRYSLER LLC

CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.

Measure the resistance of the (V38) S/C Switch No.2 Signal circuit from the C1 Clockspring harness connector to the appropriate terminal of special tool #8815.

Is the resistance below 5.0 ohms for both measurements?

Yes
1. Go to 8).
No
1. Repair the open in the (V38) S/C Switch No.2 Signal circuit between the Clockspring and PCM.
2. Perform POWERTRAIN VERIFICATION TEST .
8) (K914) SWITCH RETURN CIRCUIT OPEN

Fig 7: Checking Switch Return Circuit For Open
Courtesy of CHRYSLER LLC

Measure the resistance of the (K914) S/C Switch Return circuit from the S/C Switch harness connectors to the C4 Clockspring harness connector.

Is the resistance below 5.0 ohms for both measurements?

Yes
1. Go to 9).
No
1. Repair the open in the (K914) S/C Switch Return circuit between the Switch and Clockspring.
2. Perform POWERTRAIN VERIFICATION TEST .
9) (K914) SWITCH RETURN OPEN

Fig 8: Testing Switch Return Circuit For Open
Courtesy of CHRYSLER LLC

Measure the resistance of the (K914) Switch Return circuit from the C1 Clockspring harness connector to the appropriate terminal of special tool #8815.

Is the resistance below 5.0 ohms for both measurement?

Yes
1. Go to 10).
No
1. Repair the open in the (K914) S/C Switch Return circuit between the Clockspring and PCM.
2. Perform POWERTRAIN VERIFICATION TEST .
10) (V38) S/C SWITCH NO.2 SIGNAL CIRCUIT SHORTED TO GROUND

Fig 9: Checking For Short To Ground In Speed Control Switch No. 2 Signal Circuit
Courtesy of CHRYSLER LLC

Measure the resistance between ground and the (V38) S/C Switch No.2 Signal circuit in the Speed Control harness connectors.

Is the resistance below 100 ohms?

Yes
1. Repair the short to ground in the (V38) S/C Switch No.2 Signal circuit between the Switch and Clockspring.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go to 11).
11) (V38) S/C NO.2 SWITCH SIGNAL CIRCUIT SHORTED TO GROUND

Fig 10: Testing Speed Control Switch No. 2 Signal Circuit Short To Ground
Courtesy of CHRYSLER LLC

Measure the resistance between ground and the (V38) S/C Switch No.2 Signal circuit in the C1 Clockspring harness connector.

Is the resistance below 100 ohms?

Yes
1. Repair the short to ground in the (V38) S/C Switch No.2 Signal circuit between the Clockspring and PCM.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go to 12).
12) (V38) S/C SWITCH NO.2 SIGNAL CIRCUIT SHORTED TO THE (K914) S/C SWITCH RETURN CIRCUIT

Fig 11: Checking Speed Control Switch No. 2 Signal Circuit For Short To Switch Return Circuit
Courtesy of CHRYSLER LLC

Measure the resistance between the (V38) S/C Switch No.2 Signal circuit and the (K914) S/C Switch Return circuit in the Speed Control harness connector.

Is the resistance below 5.0 ohms?

Yes
1. Repair the short between the (V38) S/C Switch No.2 Signal circuit and the (K914) S/C Switch Return circuit between the Switch and Clockspring.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go to 13).
13) (V38) S/C SWITCH NO.2 SIGNAL CIRCUIT SHORTED TO THE (K914) S/C SWITCH RETURN CIRCUIT

Fig 12: Checking Speed Control Switch No. 2 Signal Circuit For Short To Speed Control Switch Return Circuit
Courtesy of CHRYSLER LLC

Measure the resistance between the (V38) S/C Switch No.2 Signal circuit and the (K914) S/C Switch Return circuit in the C1 Clockspring harness connector.

Is the resistance below 5.0 ohms?

Yes
1. Repair the short between the (V38) S/C Switch No.2 Signal circuit and the (K914) S/C Switch Return circuit between the Clockspring and PCM.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go to 14).

14) SPEED CONTROL SWITCH VOLTAGE VALUES

Allow the engine to idle.

With a scan tool, monitor the S/C Switch voltage readings.

SWITCH POSITION	SWITCH No.1 VOLTAGE VALUE	SWITCH No.2 VOLTAGE VALUE
NO SWITCHES PRESSED	4.31 to 4.78 volts	4.31 to 4.78 volts
ON/OFF PRESSED	0.59 to 1.13 volts	3.53 to 3.92 volts
RES/ACCEL PRESSED	3.88 to 4.17 volts	2.04 to 2.47 volts
SET PRESSED	3.16 to 3.56 volts	1.17 to 1.56 volts
COAST PRESSED	2.57 to 2.94 volts	0.77 to 1.09 volts
CANCEL PRESSED	1.59 to 1.99 volts	2.84 to 3.25 volts

Take these same voltage measurements with a voltmeter by back probing the (V37) S/C Switch No.1 Signal circuit and the (V38) S/C Switch No.2 Signal circuit at the switches.

Compare the voltage readings on the voltmeter to what the scan tool displayed.

Are the voltage readings out of the listed specification and is there less than a 0.2 of a volt difference between the voltmeter switch values and the scan tool switch values?

Yes

Replace the Speed Control Switch.
Perform POWERTRAIN VERIFICATION TEST .

Go to 15).

15) PCM
NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage or terminal push out. Repair as necessary.

Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.

Were there any problems found?

Yes
1. Repair as necessary.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Replace and program the Powertrain Control Module per Service Information.
2. Perform POWERTRAIN VERIFICATION TEST .