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Home >> Jeep >> 2014 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> (Totally Integrated Power Module (TIPM) - Electrical Diagnostics) >> DTC Troubleshooting >> B1634-Left High Beam Control Circuit High >> Diagnostic Test

Diagnostic Test

  1. INTERMITTENT CONDITION 
    1. Turn the ignition on.
    2. With the scan tool, clear all DTCs.
    3. Turn the High Beam Headlamps on.
    4. With the scan tool, read DTCs.

      Does the scan tool display DTC: B1634-LEFT HI BEAM CONTROL CIRCUIT HIGH?

      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 .
  2. CHECK THE (L33) LEFT HIGH BEAM DRIVER CIRCUIT FOR A SHORT TO VOLTAGE IN THE HARNESS 
    Fig 1: Checking Left High Beam Driver Circuit For A Short To Voltage
    GC0149185Courtesy of CHRYSLER GROUP, LLC
    1. Turn the Headlamps off.
    2. Turn the ignition off.
    3. Disconnect the Left Headlamp Lamp harness connector.
    4. Disconnect the TIPM C3 harness connector.
    5. Turn the ignition on.
    6. Measure the voltage between ground and the (L33) Left High Beam Driver circuit.

      Is there any voltage present?

      Yes 

      • Repair the short to voltage in the (L33) Left High Beam Driver circuit.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  3
  3. CHECK THE TIPM FOR CORRECT OPERATION 
    Fig 2: Checking TIPM For Correct Operation
    GC0149186Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Reconnect the TIPM C3 harness connector.
    3. Connect a 12-volt test light between the (L33) Left High Beam Driver circuit and (L911) Left Headlamp Return Signal circuit in the Left Headlamp Lamp harness connector.
    4. Turn the ignition on.
    5. Turn the High Beam Headlamps on.

      Does the test light illuminate brightly?

      Yes 

      • Replace the Left High Beam Bulb in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  4
  4. CHECK THE (L33) LEFT HIGH BEAM DRIVER CIRCUIT FOR AN OPEN IN THE HARNESS 
    Fig 3: Checking Left High Beam Driver Circuit For An Open
    GC0149187Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the TIPM C3 harness connector.
    3. Measure the resistance of the (L33) Left High Beam Driver circuit between the Left Headlamp Lamp harness connector and the TIPM C3 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  5

      No 

      • Repair the open in the (L33) Left High Beam Driver circuit.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  5. CHECK THE (L911) LEFT HEADLAMP RETURN SIGNAL CIRCUIT FOR AN OPEN IN THE HARNESS 
    Fig 4: Checking Left Headlamp Return Signal Circuit For An Open
    GC0149182Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (L911) Left Headlamp Return Signal circuit between the Left Headlamp Lamp harness connector and the TIPM C3 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Replace the Totally Integrated Power Module (TIPM) in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Repair the open in the (L911) Left Headlamp Return Signal circuit.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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