Diagnostic Test

WARNING: This page is about a different car, the 2015 RAM 3500 HD and 2015 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, record and erase the DTCs in the RF Hub.
3. Road test the vehicle driving over 25 mph (40 km/h) and shifting gears several times.
4. With the scan tool, read RF Hub DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - The condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension and repair as necessary. If no problems are found, test complete.
CHECK THE (T141) CLUTCH INTERLOCK SIGNAL CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the Clutch Switch harness connector.
3. Turn the ignition on.
4. Measure the voltage between ground and the (T141) Clutch Interlock Signal circuit at the Clutch Switch harness connector.
  Is the voltage above 11.5 volts?
  
  Yes
  - Go To 3
  No
  - Go To 5
CHECK THE (Z906) GROUND CIRCUIT FOR AN OPEN
1. Connect a test light between the (T141) Clutch Interlock Signal circuit and the (Z906) Ground circuit in the clutch switch harness connector.
2. Be sure the ignition is still on.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 4
  No
  - Repair the (Z906) Ground circuit for an open.
CHECK THE (T141) CLUTCH INTERLOCK SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the Radio Frequency Hub C1 harness connector.
3. Turn the ignition on.
4. Measure the voltage between ground and the (T141) Clutch Interlock Signal circuit at the Clutch Switch harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (T141) Clutch Interlock Signal circuit for a short to voltage.
  No
  - Replace the Clutch Switch in accordance with the Service Information.
CHECK THE (T141) CLUTCH INTERLOCK SIGNAL CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the Radio Frequency Hub C1 harness connector.
3. Check for continuity between ground and the (T141) Clutch Interlock Signal circuit at the Clutch Switch harness connector.
  Is there continuity between ground and the (T141) Clutch Interlock Signal circuit?
  
  Yes
  - Repair in the (T141) Clutch Interlock Signal circuit for a short to ground.
  No
  - Go To 6
CHECK THE (T141) CLUTCH INTERLOCK SWITCH SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Measure the resistance of the (T141) Clutch Interlock Signal circuit between the RF Hub C1 harness connector and the Clutch Switch harness connector.
  Is the resistance below 2.0 Ohms?
  
  Yes
  - Replace the RF HUB Module in accordance with the Service Information. Refer to MODULE, RADIO FREQUENCY (RF HUB), REMOVAL .
  - Perform the RADIO FREQUENCY HUB VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Repair the (T141) Clutch Interlock Signal circuit for an open or high resistance.