Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

TEST FOR INTERMITTENT CONDITION
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 the active DTCs.
  Does the scan tool display; B1F05-12-ELECTROCHROMATIC CONTROL CIRCUIT - CIRCUIT SHORT TO BATTERY as active?
  
  Yes
  - Go To 2
  No
  - Test complete, 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.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
(P135) DRIVER AUTO DAY/NIGHT MIRROR SIGNAL CIRCUIT SHORTED TO BATTERY

Fig 1: Measuring Voltage Between Ground & Driver Auto Day/Night Mirror Signal Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Driver Outside Rearview Mirror (C1) harness connector from the DDM.
3. Turn the ignition on.
4. Measure the voltage between ground and the (P135) Driver Auto Day/Night Mirror Signal circuit.
  Is the voltage above 0.8 volts?
  
  Yes
  - Repair the short to voltage in the (P135) Driver Auto Day/Night Mirror Signal circuit. If the harness appears good, replace the Mirror in accordance with the Service Information. Refer to MIRROR, OUTSIDE REARVIEW, REMOVAL and MIRROR, OUTSIDE REARVIEW, GLASS, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
(P136) DRIVER AUTO DAY/NIGHT MIRROR RETURN CIRCUIT OPEN

Fig 2: Measuring Resistance Between Driver Auto Day/Night Mirror Signal Circuit & Driver Auto Day/Night Mirror Return Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Measure the resistance between the (P135) Driver Auto Day/Night Mirror Signal circuit and the (P136) Driver Auto Day/Night Mirror Return circuit.
  Is the resistance above 100.0 Ohms?
  
  Yes
  - Repair the open in the (P135) Driver Auto Day/Night Mirror Return circuit. If the harness appears good, replace the Mirror in accordance with the Service Information. Refer to MIRROR, OUTSIDE REARVIEW, REMOVAL and MIRROR, OUTSIDE REARVIEW, GLASS, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
(P135) DRIVER AUTO DAY/NIGHT MIRROR SIGNAL CIRCUIT SHORTED TO ANOTHER SIGNAL OR DRIVER CIRCUIT

Fig 3: Checking Driver Auto Day/Night Mirror Signal Circuit For Short To Signal Or Driver Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Disconnect the Driver Outside Rearview Mirror (C2) harness connector.
2. Measure the resistance between the (P135) Driver Auto Day/Night Mirror Signal circuit (C1-4) and all designated Signal or Driver circuits in the C1 and C2 connectors.
  Is the resistance below 20K Ohms in any measurement?
  
  Yes
  - Repair the short between the (P135) Driver Auto Day/Night Mirror Signal circuit and the Signal or Driver circuit. If the harness appears good, replace the Mirror in accordance with the Service Information. Refer to MIRROR, OUTSIDE REARVIEW, REMOVAL and MIRROR, OUTSIDE REARVIEW, GLASS, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - 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 .