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Home >> Dodge and Ram >> 2017 >> Challenger SXT Plus >> Repair and Diagnosis >> External Pages >> Different car >> Section 658 (Adaptive Front Lighting System Module - Electrical Diagnostics) >> DTC Troubleshooting >> B1681-00-Rear Headlamp Leveling Sensor Circuit Performance >> Diagnostic Test
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Diagnostic Test

WARNING: This page is about a different car, the 2015 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR AN ACTIVE DTC 
    NOTE:

    A loose or damaged sensor linkage may cause this DTC to set. Visually inspect the linkage for proper installation or damage. Repair as necessary.

    1. Start the Engine.
    2. With the scan tool, read Adaptive Front Lighting System (AFLS) Module DTCs and record on the repair order.

      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. If no problems are found, test complete.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  2. CHECK THE (L964) HEADLAMP LEVELING SENSOR 5 VOLT SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE, GROUND, OR AN OPEN/HIGH RESISTANCE 
    1. Turn the ignition off.
    2. Disconnect the Rear Headlamp Level Sensor harness connector.
    3. Start the Engine.
    4. Measure the voltage of the (L964) Rear Headlamp Leveling Sensor 5 Volt Supply circuit at the Rear Headlamp Level Sensor harness connector.

      Is the voltage between 4.5 and 5.5 volts?

      Yes 

      • Go To  3

      No 

      • If the voltage is below 4.5 volts, repair the (L964) Headlamp Leveling Sensor 5 Volt Supply circuit for a short to ground or an open/high resistance.
      • If the voltage is above 5.5 volts, repair the (L964) Headlamp Leveling Sensor 5 Volt Supply circuit for a short to voltage.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  3. CHECK THE (L963) REAR HEADLAMP LEVELING SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE, GROUND, OR AN OPEN/HIGH RESISTANCE 
    1. Measure the voltage of the (L963) Rear Headlamp Leveling Sensor Signal circuit at the Rear Headlamp Level Sensor harness connector.

      Is the voltage between 4.5 and 5.5 volts?

      Yes 

      • Go To  4

      No 

      • If the voltage is below 4.5 volts, repair the (L963) Rear Headlamp Leveling Sensor Signal circuit for a short to ground or an open/high resistance.
      • If the voltage is above 5.5 volts, repair the (L963) Rear Headlamp Leveling Sensor Signal circuit for a short to voltage.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  4. CHECK THE (L961) HEADLAMP LEVELING SENSOR 5 VOLT RETURN CIRCUIT FOR A SHORT TO VOLTAGE, GROUND, OR AN OPEN/HIGH RESISTANCE 
    1. Measure the voltage of the (L961) Rear Headlamp Leveling Sensor 5 Volt Return circuit at the Rear Headlamp Level Sensor harness connector.

      Is the voltage between 4.5 and 5.5 volts?

      Yes 

      No 

      • If the voltage is below 4.5 volts, repair the (L961) Headlamp Leveling Sensor 5 Volt Return circuit for a short to ground or an open/high resistance.
      • If the voltage is above 5.5 volts, repair the (L961) Headlamp Leveling Sensor 5 Volt Return circuit for a short to voltage.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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