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Home >> Jeep >> 2014 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 189 ((Totally Integrated Power Module (TIPM) - Electrical Diagnostics)) >> DTC Troubleshooting >> B1638-Right High Beam Control Circuit High >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.
  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: B1638-RIGHT 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 (L34) RIGHT HIGH BEAM DRIVER CIRCUIT FOR A SHORT TO VOLTAGE IN THE HARNESS 
    Fig 1: Checking Right High Beam Driver Circuit For A Short To Voltage
    GC0149198Courtesy of CHRYSLER GROUP, LLC
    1. Turn the Headlamps off.
    2. Turn the ignition off.
    3. Disconnect the Right Headlamp Lamp harness connector.
    4. Disconnect the TIPM C3 harness connector.
    5. Turn the ignition on.
    6. Measure the voltage between ground and the (L34) Right High Beam Driver circuit.

      Is there any voltage present?

      Yes 

      • Repair the short to voltage in the (L34) Right 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
    GC0149199Courtesy 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 (L34) Right High Beam Driver circuit and (L910) Right Headlamp Return Signal circuit in the Right 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 Right 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 (L34) RIGHT HIGH BEAM DRIVER CIRCUIT FOR AN OPEN IN THE HARNESS 
    Fig 3: Checking Right High Beam Driver Circuit For An Open
    GC0149200Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the TIPM C3 harness connector.
    3. Measure the resistance of the (L34) Right High Beam Driver circuit between the Right 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 (L34) Right High Beam Driver circuit.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  5. CHECK THE (L910) RIGHT HEADLAMP RETURN SIGNAL CIRCUIT FOR AN OPEN IN THE HARNESS 
    Fig 4: Checking Right Headlamp Return Signal Circuit For An Open
    GC0149195Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (L910) Right Headlamp Return Signal circuit between the Right 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 (L910) Right Headlamp Return Signal circuit.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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