Diagnostic Test

2010 Jeep Grand Cherokee Limited, 5.7 T, 4WDSECTION Diagnostic Test
  1. A5 CIRCUIT OPEN 
    NOTE: Check all fuses and circuit breakers before proceeding with the diagnosis of this DTC.
    1. Turn the ignition on.
    2. Remove the Wiper ON/OFF relay.
    3. Measure the voltage at cavity 86 of the Wiper ON/OFF relay.

      Is the voltage above 10.0 Volts?

      Yes 

      • Go to step  2

      No 

  2. WIPER ON/OFF RELAY 
    1. Turn the ignition off.
    2. Replace the Wiper ON/OFF relay with a known good relay.
    3. Turn the ignition on.
    4. Using the scan tool, clear all FCM DTCs.
    5. Turn the Wipers ON then OFF.
    6. Using the scan tool, read the Wiper DTCs.

      Does the scan tool read: B2313-WIPER ON/OFF CONTROL CIRCUIT LOW?

      Yes 

      • Go to step  3

      No 

  3. INTEGRATED POWER MODULE 
    1. Turn the ignition off.
    2. Disconnect the FCM from the IPM.
    3. Measure the voltage on cavity 27 of the IPM.

      Is the voltage above 10.0 Volts?

      Yes 

      No 

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.