LEMON Manuals: Even more car manuals for everyone
Home >> Jeep >> 2025 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> (Instrument Cluster - Electrical Diagnostics) >> DTC Troubleshooting >> B0125-02 Night Vision Control Module - General Signal Failure >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR ANY SERVICE BULLETINS OR MODULE SOFTWARE UPDATES 
    1. Check for any applicable Service Bulletins or Flash updates related to the DTC.

      Are there any applicable Service Bulletins or Flash updates?

      Yes 

      No 

      • Go To  2
  2. READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN 
    1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
    2. For future reference, run and save a vehicle Scan Report and all related recorded data.
    3. With the scan tool, erase all DTCs.
    4. Turn the ignition off for a minimum of 10.0 seconds.
    5. Turn the ignition on.
    6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
    7. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  3

      No 

  3. CHECK THE (J243) LOW VOLTAGE DIFFERENTIAL SIGNALING (LVDS) CABLE CONNECTIONS BETWEEN THE NIGHT VISION PROCESSING MODULE (NVPM) AND THE NIGHT VISION CAMERA (NVC) 
    1. Turn the ignition off.
    2. Verify that the (J243) LVDS Cable connectors are completely plugged in and locked prior to disconnecting.
    3. Check the (J243) LVDS Cable connectors at the NVPM, NVC and any in-line connectors for the following:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Weather seal damage or signs of water intrusion.
      • Bent terminals.
      • Terminals that have been pushed back into the connector cavity.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).

      Were there any problems found?

      Yes 

      • Repair the found issues in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to: BODY VERIFICATION TEST .

      No 

      • Go To  4
  4. CHECK THE (J243) LVDS CABLE BETWEEN THE NVPM AND THE NVC 
    CAUTION:

    Do not attempt to insert anything other then the test leads listed below. Failure to do so can damage the terminals or LVDS cable insulation.

    1. Using the test leads from the Low Voltage Electrical Terminal Test Kit [special tool #2064100081] check the (J243) LVDS Cable using the test lead [special tool # 2064103080] at the Night Vision Camera (NVC) connector and the test lead [special tool # 2064103080] at the NVPM connector.
      • Open or high resistance (greater than 1.0 Ohm).
      • Short to ground.
      • Short to voltage or another circuit.

      Were any problems found with the (J243) LVDS Cable?

      Yes 

      • Replace the (J243) LVDS Cable in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to: BODY VERIFICATION TEST .

      No 

      • Go To  5
  5. CHECK THE (J244) LVDS CABLE CONNECTIONS BETWEEN THE NVPM AND THE INSTRUMENT PANEL CLUSTER (IPC) 
    1. Turn the ignition off.
    2. Verify that the (J244) LVDS Cable connectors are completely plugged in and locked prior to disconnecting.
    3. Check the (J244) LVDS Cable connectors at the NVPM, IPC and any in-line connectors for the following:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Weather seal damage or signs of water intrusion.
      • Bent terminals.
      • Terminals that have been pushed back into the connector cavity.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).

      Were there any problems found?

      Yes 

      • Repair the found issues in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to: BODY VERIFICATION TEST .

      No 

      • Go To  6
  6. CHECK THE (J244) LVDS CABLE BETWEEN THE NVPM AND THE IPC 
    1. Using the test leads from the Low Voltage Electrical Terminal Test Kit [special tool #2064100081] check the (J244) LVDS Cable using the test lead [special tool # 2064103080] at the Instrument Panel Cluster (IPC) connector and the test lead [special tool # 2064103080] at the NVPM connector.

      Check all three LVDS Cable circuits for the following:

      • Open or high resistance (greater than 1.0 Ohm).
      • Short to ground.
      • Short to voltage or another circuit.

      Were any problems found with the (J244) LVDS Cable?

      Yes 

      • Replace the (J244) LVDS Cable in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to: BODY VERIFICATION TEST .

      No 

      • Go To  7
  7. REPLACE THE NIGHT VISION PROCESSING MODULE (NVPM) - ERASE DTCS AND CHECK FOR DTC TO RETURN 
    1. Replace the Night Vision Processing Module (NVPM) in accordance with the Service Information. Refer to MODULES, REMOVAL AND INSTALLATION .
    2. Connect the component and Electronic Control Unit (ECU) harness connectors.
    3. Turn the ignition on.
    4. With the scan tool, erase all DTCs.
    5. Turn the ignition off for a minimum of 10.0 seconds.
    6. Turn the ignition on.
    7. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
    8. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  8

      No 

      • Replacing the Night Vision Processing Module (NVPM) corrected the condition.
      • Perform the BODY VERIFICATION TEST. Refer to: BODY VERIFICATION TEST .
  8. REPLACE THE INSTRUMENT PANEL CLUSTER (IPC) - ERASE DTCS AND CHECK FOR DTC TO RETURN 
    1. Turn the ignition off.
    2. Replace the Instrument Panel Cluster (IPC) in accordance with the Service Information. Refer to MODULE, INSTRUMENT PANEL CLUSTER (IPC), REMOVAL AND INSTALLATION .
    3. Connect the component and Electronic Control Unit (ECU) harness connectors.
    4. Turn the ignition on.
    5. With the scan tool, erase all DTCs.
    6. Turn the ignition off for a minimum of 10.0 seconds.
    7. Turn the ignition on.
    8. Using the Environmental Data or When Monitored Conditions, operate the vehicle under the conditions that set the DTC.
    9. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      No 

      • Replacing the Instrument Panel Cluster (IPC) corrected the condition.
      • Perform the BODY VERIFICATION TEST. Refer to: BODY VERIFICATION TEST .
scientia non olet · About LEMON Manuals