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. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs).
3. Cycle the ignition from on to off then back to on.
4. Press and release the Mirror Select switch to select the Driver Outside Rearview Mirror.
5. Open the driver door to turn the approach lights on. Leave the door open.
6. Turn the drivers turn signal on.
7. Fold and unfold the mirrors (if equipped).
8. Turn the rear defogger on (if equipped with heated mirrors).
9. Operate the Mirror Adjust switch in all directions several times while monitoring the scan tool for DTCs.
  NOTE:
  After adjusting the mirror in one direction wait at least two seconds before adjusting the mirror in the opposite direction, as this will allow time for an active fault to set if present.
10. With the scan tool, read the DTCs.
  Does the scan tool display: B2861-15-MIRROR APPROACH LIGHT CONTROL - CIRCUIT SHORT TO BATTERY OR OPEN?
  
  Yes
  - Go To 2
  No
  - The conditions that caused this code to set are not present at this time. Repeat this test again. If this DTC is now present, Go To 2. Otherwise, use the wiring diagram/schematic as a guide and inspect the wiring and connectors.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK (P551) DRIVER MIRROR APPROACH LAMP DRIVER CIRCUIT FOR A SHORT TO VOLTAGE

Fig 1: Checking Driver Mirror Approach Lamp Driver Circuit For Short To Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Driver Outside Rearview Mirror C1 and C2 (Component Side) harness connectors from the Door Module.
3. Turn the ignition on.
4. Measure the voltage between ground and the (P551) Driver Mirror Approach Lamp Driver circuit in the Driver Outside Rearview Mirror C1 (Component Side) harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (P551) Driver Mirror Approach Lamp Driver circuit for a short to voltage. If the wiring harness and connector are okay, replace the Driver Outside Rearview 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
CHECK (P551) DRIVER MIRROR APPROACH LAMP DRIVER CIRCUIT AND (P552) APPROACH LAMP RETURN CIRCUIT FOR AN OPEN

Fig 2: Checking Driver Mirror Approach Lamp Driver Circuit & Driver Blind Spot/Approach Return Circuit For Open
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Measure the resistance between the (P551) Driver Mirror Approach Lamp Driver circuit and the (P552) Approach Lamp Return circuit at the Driver Outside Rearview Mirror C1 (Component Side) connector.
  Is the resistance below 10.0 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the (P551) Driver Mirror Approach Lamp Driver circuit or the (P552) Approach Lamp Return circuit for an open. If the wiring harness and connector are okay, replace the Driver Outside Rearview 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 .
CHECK (P551) DRIVER MIRROR APPROACH LAMP DRIVER CIRCUIT FOR A SHORT TO ANOTHER MIRROR DRIVER OR SIGNAL CIRCUIT

Fig 3: Checking Driver Mirror Approach Lamp Driver Circuit For Short To Mirror Driver Or Signal Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between the (P551) Driver Mirror Approach Lamp Driver circuit (C1-1) and each of the designated Mirror Driver and Signal circuits in the Driver Outside Rearview Mirror C1 and C2 (Component Side) connectors.
  Is the resistance below 10K Ohms for any measurement?
  
  Yes
  - Repair all circuits with a resistance below 10K Ohms for a short to the (P551) Driver Mirror Approach Lamp Driver circuit. If the wiring harness and connector are okay, replace the Driver Outside Rearview 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
  - Inspect the wiring and connectors for damage and repair as necessary. If the wiring and connectors are okay, 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 .