Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSJEEP2009COMMANDER OVERLAND, RWDREPAIR AND DIAGNOSISENGINE PERFORMANCEIGNITION SYSTEMFRONT CONTROL MODULE (FCM) - ELECTRICAL DIAGNOSTICSDTC TROUBLESHOOTINGB2807-HID HEADLAMP CONTROL CIRCUIT OPENDIAGNOSTIC TEST

2009 Jeep Commander Overland, RWD

Diagnostic Test

2009 Jeep Commander Overland, RWDSECTION Diagnostic Test

INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, erase all FCM DTCs.
3. Turn the HID Headlamps on.
4. With the scan tool, read the DTCs.
  Does the scan tool display DTC B2807-HID HEADLAMP CONTROL CIRCUIT OPEN?
  
  Yes
  - Go to step 2
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using SYSTEM 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. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
CHECK THE HID HEADLAMPS RELAY
1. Turn the ignition off.
2. Substitute the HID Headlamps Relay with a known good relay.
3. Turn the ignition on.
4. Turn the HID Headlamps on.
  Do the HID Headlamps operate correctly?
  
  Yes
  - Replace the HID Headlamps Relay.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 3
CHECK THE (L44) RIGHT LOW BEAM CONTROL CIRCUIT FOR AN OPEN

Fig 1: Checking Right Low Beam Control Circuit For An Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the FCM C2 harness connector.
3. Remove the HID Headlamps Relay.
4. Measure the resistance of the (L44) Right Low Beam Control circuit between the FCM C2 harness connector and the HID Headlamps Relay.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go to step 4
  No
  - Repair the open in the (L44) Right Low Beam Control circuit.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
CHECK THE (L44) RIGHT LOW BEAM CONTROL CIRCUIT FOR A SHORT TO VOLTAGE

Fig 2: Checking Right Low Beam Control Circuit For A Short To Voltage
Courtesy of CHRYSLER LLC
1. Turn the ignition on.
2. Measure the voltage between ground and the (L44) Right Low Beam Control circuit at the HID Headlamps Relay.
  Is any voltage present?
  
  Yes
  - Repair the short to voltage on the (L44) Right Low Beam Control circuit.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Replace the FCM in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.