Diagnostic Test

SPEED CONTROL SWITCH SENSE VOLTAGES OUT OF RANGE

SWITCH POSITION	SWITCH 1 VOLTAGE VALUE	SWITCH 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/DECEL PRESSED	3.16 to 3.56 Volts	1.17 to 1.56 Volts
CANCEL PRESSED	1.59 to 1.99 Volts	2.84 to 3.25 Volts

Turn the ignition on.
Using the scan tool, monitor the S/C Switch Sense signal voltages.
Press each button while noting the voltage readings for each circuit.
Are the Speed Control Switch voltages within the ranges specified in the table when each button is pressed?

Yes
- Perform the INTERMITTENT DTC diagnostic procedure. See DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure .
No
- Go to step 2

SPEED CONTROL SWITCH
1. Turn the ignition off.
2. Disconnect the Speed Control Switch harness connector in accordance with the Service Information.
3. Measure the resistance between the (V71) S/C Switch Sense 1 terminal and the (V937) S/C Switch Return terminal at the Speed Control Switch, not the harness connector.
4. Monitor the Ohmmeter while pressing each function button on each switch.
5. The following resistance specs are taken between terminals (V71) S/C Switch Sense 1 terminal and the (V937) Switch Return terminal 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/Decel - 4.34 kOhms
  - Cancel - 1.24 kOhms
  - Resume/Accel - 8.80 kOhms
  Does the function on the Speed Control Switch have the correct resistance value +/- 0.2 Ohm?
  
  Yes
  - Go to step 3
  No
  - Replace the Speed Control Switch in accordance with the Service Information.
  - Perform the ECM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure .
CLOCKSPRING
1. Disconnect the C2 ECM harness connector.
2. Disconnect the C2 Clockspring harness connector in accordance with the Service Information.
3. Disconnect the C8 Clockspring harness connector.
4. Measure the resistance of the (V71) S/C Switch Sense 1 circuit between the C2 and C8 Clockspring connections.
5. Measure the resistance of the (V937) Switch Return circuit between the C2 and C8 Clockspring connections.
  Is the resistance above 5.0 Ohms for either reading?
  
  Yes
  - Replace the Clockspring in accordance with the Service Information.
  - Perform the ECM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure .
  No
  - Go to step 4
STEERING WHEEL JUMPER HARNESS

Fig 1: Measuring Resistance Of S/C Switch Sensor Circuit Switch Return Circuit Between Clockspring Harness Connector And S/C Switch Harness Connector
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (V71) S/C Switch Sense 1 circuit between the Clockspring C8 harness connector and Speed Control Switch harness connector.
2. Measure the resistance of the (V937) Switch Return circuit between the Clockspring C8 harness connector and Speed Control Switch harness connector.
  Is the resistance above 5.0 Ohms for either reading?
  
  Yes
  - Replace the Steering Wheel Jumper harness in accordance with the Service Information.
  - Perform the ECM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure .
  No
  - Go to step 5
(V71) S/C SWITCH SENSE 1 CIRCUIT SHORTED TO VOLTAGE

Fig 2: Measuring Voltage On S/C Switch Sense Circuits In Clockspring Harness Connector
Courtesy of CHRYSLER LLC
1. Turn the ignition on.
2. Measure the voltage of the (V71) S/C Switch Sense 1 circuit in the Clockspring C2 harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (V71) S/C Switch Sense 1 circuit.
  - Perform the ECM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure .
  No
  - Go to step 6
(V71) S/C SWITCH SENSE 1 CIRCUIT OPEN

Fig 3: Measuring Resistance Of S/C Switch Sensor Circuit From Clockspring Harness Connector To ECM Harness Connector
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Measure the resistance of the (V71) S/C Switch Sense 1 circuit from the Clockspring C2 harness connector to the ECM C2 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go to step 7
  No
  - Repair the open in the (V71) S/C Switch Sense 1 circuit.
  - Perform the ECM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure .
(V937) S/C SWITCH RETURN CIRCUIT OPEN

Fig 4: Measuring Resistance Of Switch Return Circuit From Clockspring Harness Connector To ECM C2 Harness Connector
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (V937) Switch Return circuit from the Clockspring C2 harness connector to the ECM C2 harness connector.
  Is the resistance below 5.0 Ohms for both measurements?
  
  Yes
  - Go to step 8
  No
  - Repair the open in the (V937) S/C Switch Return circuit.
  - Perform the ECM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure .
(V71) S/C SWITCH SENSE 1 CIRCUIT SHORTED TO THE (V937) S/C SWITCH RETURN CIRCUIT

Fig 5: Measuring Resistance Between S/C Switch Sensor Circuit And S/C Switch Return Circuit In Clockspring C2 Harness Connector
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (V71) S/C Switch Sense 1 circuit and the (V937) S/C Switch Return circuit in the Clockspring C2 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the short between the (V71) S/C Switch Sense 1 circuit and the (V937) S/C Switch Return circuit.
  - Perform the ECM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure .
  No
  - Go to step 9
(V71) S/C SWITCH SENSE 1 CIRCUIT SHORTED TO GROUND

Fig 6: Measuring Resistance Between Ground And S/C Switch Sensor Circuit In SCM Harness Connector
Courtesy of CHRYSLER LLC
1. Measure the resistance between ground and the (V71) S/C Switch Sense 1 circuit in the Clockspring C2 harness connector.
  Is the resistance below 100 Ohms?
  
  Yes
  - Repair the short to ground in the (V71) S/C Switch Sense 1 circuit.
  - Perform the ECM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure .
  No
  - Go to step 10
ENGINE CONTROL MODULE (ECM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Speed Control Switch and the Engine Control Module (ECM).
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
  - Repair as necessary.
  - Perform the ECM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure .
  No
  - Replace the Engine Control Module (ECM) in accordance with the Service Information.
  - Perform the ECM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure .