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Home >> Jeep >> 2017 >> Wrangler Sahara, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 100 ((Driver Door Module (DDM) (DMFL/R) - Electrical Diagnostics)) >> DTC Troubleshooting >> B2861-15-Mirror Approach Light Control - Circuit Short To Battery Or Open >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR AN ACTIVE DTC 
    1. Turn the ignition on.
    2. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
    3. Turn 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 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 BODY VERIFICATION TEST .
  2. CHECK THE (P551) DRIVER MIRROR APPROACH LAMP DRIVER CIRCUIT FOR A SHORT TO VOLTAGE 
    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 at the Driver Outside Rearview Mirror (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 Outside Rearview Mirror in accordance with Service Information. Refer to MIRROR, OUTSIDE REARVIEW, GLASS, REMOVAL .
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Go To  3
  3. CHECK THE (P551) DRIVER MIRROR APPROACH LAMP DRIVER CIRCUIT AND (P552) APPROACH LAMP RETURN CIRCUIT FOR AN OPEN 
    1. Turn the ignition off.
    2. Check for continuity between the (P551) Driver Mirror Approach Lamp Driver circuit and the (P552) Approach Lamp Return circuit at the Driver Outside Rearview Mirror (Component Side) connector.

      Is there continuity between the (P551) Driver Mirror Approach Lamp Driver circuit and the (P552) Approach Lamp Return circuit?

      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 Outside Rearview Mirror in accordance with Service Information. Refer to MIRROR, OUTSIDE REARVIEW, GLASS, REMOVAL .
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  4. CHECK THE (P551) DRIVER MIRROR APPROACH LAMP DRIVER CIRCUIT FOR A SHORT TO ANOTHER MIRROR DRIVER OR SIGNAL CIRCUIT 
    1. Check for continuity between the (P551) Driver Mirror Approach Lamp Driver circuit and each of the designated Mirror Driver and Signal circuits in the Driver Outside Rearview Mirror (Component Side) connectors.

      Is there continuity between the (P551) Driver Mirror Approach Lamp Driver circuit and any of the designated Mirror Driver and Signal circuits?

      Yes 

      • Repair any circuit for a short to the (P551) Driver Mirror Approach Lamp Driver circuit. If the wiring harness and connector are okay, replace the Outside Rearview Mirror in accordance with Service Information. Refer to MIRROR, OUTSIDE REARVIEW, GLASS, REMOVAL .
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Go To  5
  5. MIRROR OR MODULE 
    1. Replace the Outside Rearview Mirror in accordance with Service Information. Refer to MIRROR, OUTSIDE REARVIEW, GLASS, REMOVAL .
    2. Turn the ignition on.
    3. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs).
    4. Turn the ignition off then back to on.
    5. Open the passenger door to turn the approach lights on.
    6. Turn the passenger side 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 DDM DTCs.

      Is the DTC active?

      Yes 

      No 

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