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.
3. Block the Light Sensor in the Interior Rearview Mirror.
4. Shift the transmission to Drive (engine not running).
5. Wait two minutes.
6. With the scan tool, read DDM 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.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (P135) DRIVER AUTO DAY/NIGHT MIRROR SIGNAL CIRCUIT AND THE (P136) DRIVER AUTO DAY/NIGHT MIRROR RETURN CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the Driver Outside Rearview Mirror (C1) harness connector.
3. Measure the resistance between the (P135) Driver Auto Day/Night Mirror Signal circuit and (P136) Driver Auto Day/Night Mirror Return circuit at the Driver Outside Rearview Mirror (C1) harness connector.
  NOTE:
  The resistance should clock up from approximately 25.0 Ohms to approximately 60.0 Ohms in about 10 seconds.
  
  Did the resistance clock up and stay under 100.0 Ohms?
  
  Yes
  - Go To 3
  No
  - Repair the (P135) Driver Auto Day/Night Mirror Signal / (P136) Driver Auto Day/Night Mirror Return circuit(s) for an open.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
MIRROR OR MODULE
1. Replace the Mirror in accordance with the Service Information. Refer to MIRROR, OUTSIDE REARVIEW, REMOVAL and MIRROR, OUTSIDE REARVIEW, GLASS, REMOVAL .
2. Turn the ignition on.
3. With the scan tool, record and erase the DTCs.
4. Block the Light Sensor in the Interior Rearview Mirror.
5. Shift the transmission to Drive (engine not running).
6. Wait two minutes.
7. With the scan tool, read DDM DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Driver Door Module in accordance with the Service Information. Refer to MODULE, DOOR, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test complete.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .