Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  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 BODY VERIFICATION TEST .
(F921) FUSED RUN RELAY OUTPUT CIRCUIT OPEN OR SHORTED TO GROUND

Fig 1: Checking Fused Run Relay Output Circuit For An Open Or Shorted To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Left Front Lamp Assembly C5 harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (F921) Fused Run Relay Output circuit.
  Is the voltage greater than 10.0 volts?
  
  Yes
  - Go To 3.
  No
  - Repair the (F921) Fused Run Relay Output circuit for an open or short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(Z901) GROUND CIRCUITS OPEN

Fig 2: Checking Ground Circuits For Open
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Measure the resistance between ground and the (Z901) Ground circuits.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 4.
  No
  - Repair the open in the (Z901) Ground circuits.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
MEASURE THE VOLTAGE OF THE (D503) LIN LIGHTING CIRCUIT

Fig 3: Measuring The Voltage Of The LIN Lighting Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition on.
2. Measure the voltage of the (D503) LIN Lighting circuit.
  Is voltage present?
  
  Yes
  - Replace the Left Headlamp Assembly in accordance with the Service Information. Refer to UNIT, FRONT LAMP, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 5.
(D503) LIN LIGHTING CIRCUIT SHORTED TO GROUND

Fig 4: Checking LIN Lighting Circuit For A Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Right Front Headlamp Assembly C2 harness connector.
3. Measure the resistance between ground and the (D503) LIN Lighting circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the short to ground in the (D503) LIN Lighting circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 6.
(D503) LIN LIGHTING CIRCUIT OPEN

Fig 5: Checking LIN Lighting Circuit For An Open Or High Resistance
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (D503) LIN Lighting circuit.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the AHLM in accordance with the Service Information. Refer to MODULE, HEADLAMP LEVELING, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the open in the (D503) LIN Lighting circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .