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 MANUALSJEEP2009GRAND CHEROKEE LAREDO, 4.7 P, RWDREPAIR AND DIAGNOSISENGINE PERFORMANCEIGNITION SYSTEM(FRONT CONTROL MODULE (FCM) - ELECTRICAL DIAGNOSTICS)DTC TROUBLESHOOTINGB2134-IGNITION RUN/START (REMOTE START) CONTROL CIRCUIT HIGHDIAGNOSTIC TEST

2009 Jeep Grand Cherokee Laredo, 4.7 P, RWD

Diagnostic Test

2009 Jeep Grand Cherokee Laredo, 4.7 P, RWDSECTION Diagnostic Test

CHECK FOR ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. Turn the ignition on.
2. Using the scan tool, read the active DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go to step 2
  No
  - If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out or corroded terminals.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
REMOTE START RELAY
1. Turn the ignition off.
2. Install a substitute relay in place of the original Remote Start Relay.
3. Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds.
4. Using the scan tool, read the active FCM DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go to step 3
  No
  - Replace the original Remote Start Relay.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
(K617) REMOTE START RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE

Fig 1: Checking Remote Start Relay Control Circuit Shorted To Voltage
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the IPM C1 harness connector.
3. Remove the Remote Start Relay.
4. Turn the ignition on.
5. Measure the voltage of the (K617) Remote Start Relay Control circuit at the relay connector (cavity 85).
  Is the voltage above 10.0 Volts?
  
  Yes
  - Repair the (K617) Remote Start Relay Control circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 4
INTEGRATED POWER MODULE (IPM) / FRONT CONTROL MODULE (FCM)

Fig 2: Checking Remote Start Relay Control Circuit Shorted To Voltage
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Reconnect the IPM C1 harness connector.
3. Remove the FCM from the IPM.
4. Turn the ignition on.
5. Measure the voltage of the (K617) Remote Start Relay Control circuit at the relay connector (cavity 85).
  Is the voltage above 10.0 Volts?
  
  Yes
  - Replace the IPM in accordance with the Service Information.
  - 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.