Diagnostic Test

2009 Jeep Compass Sport, 2.4 B, ED3, AWD, Automatic CVTSECTION Diagnostic Test
  1. CHECK FOR ACTIVE DTC B106C-REAR DEFROST CONTROL CIRCUIT HIGH IN THE TIPM 
    1. Turn the ignition on.
    2. With the scan tool, record and erase the DTCs.
    3. Operate the rear defogger switch several times.
    4. With the scan tool, read the DTCs.

      Does the scan tool display active DTC: B106C-REAR DEFROST CONTROL CIRCUIT HIGH?

      Yes 

      • Go to step  2

      No 

  2. CHECKING THE WINDOW GRID AND (Z905) GROUND CIRCUIT 
    1. Turn the ignition off.
    2. Disconnect the electric heated backlite (power) 1-way connector.
    3. Using a 12-volt test light connected to 12-volts, check the power terminal at the window defogger grid.

      Does the test light illuminate? If necessary, compare with a known good vehicle.

      Yes 

      • Go to step  4

      No 

      • Go to step  3
  3. (Z905) GROUND CIRCUIT OPEN 
    Fig 1: Checking Ground Circuit Using 12-Volt Test Light
    GC0100093Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the electric heated backlite (ground) 1-way connector.
    3. Using a 12-volt test light connected to 12-volts, check the (Z905) Ground circuit at the 1-way connector.

      Does the test light illuminate brightly?

      Yes 

      No 

  4. VEHICLE EQUIPPED WITH HEATED MIRRORS 

    Is vehicle equipped with heated mirrors?

    Yes 

    • Go to step  5

    No 

    • Go to step  7
  5. DISCONNECT ONE MIRROR AND RECHECK DTC 
    NOTE: For this step, disconnect each outside rearview mirror one at a time and then recheck for DTCs.
    1. Ignition on, engine not running.
    2. With the scan tool, erase the TIPM DTCs.
    3. Operate the rear defogger switch several times.
    4. With the scan tool, read the TIPM DTCs.

      Does the scan tool display active DTC: B106C-REAR DEFROST CONTROL CIRCUIT HIGH?

      Yes 

      • Go to step  7

      No 

      • Go to step  6
  6. MIRROR GROUND CIRCUIT 
    Fig 2: Checking Mirror Ground Circuit Using 12-Volt Test Light
    GC0100094Courtesy of CHRYSLER LLC
    1. Using a 12-volt test light connected to 12-volts, check the (Z960) Ground circuit at the mirror connector.

      Does the test light illuminate brightly?

      Yes 

      No 

  7. (C515) REAR WINDOW DEFOGGER CONTROL OUTPUT CIRCUIT SHORTED TO BATTERY VOLTAGE 
    Fig 3: Checking Rear Window Defogger Control Output Circuit For Short To Voltage
    GC0100095Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the TIPM C8 harness connector.
    3. Ignition on, engine not running.
    4. Measure the voltage between the (C515) Rear Window Defogger Control Output circuit and ground at the TIPM C8 harness connector.

      Is there any voltage present?

      Yes 

      No 

      • Go to step  8
  8. (C16) FUSED REAR WINDOW DEFOGGER CONTROL OUTPUT CIRCUIT SHORTED TO BATTERY VOLTAGE 
    Fig 4: Checking Fused Rear Window Defogger Control Output Circuit For Short To Voltage
    GC0100096Courtesy of CHRYSLER LLC
    1. Measure the voltage between the (C16) Fused Rear Window Defogger Control Output circuit and ground at the TIPM C8 harness connector.

      Is there any voltage present?

      Yes 

      No 

      • Go to step  9
  9. TOTALLY INTEGRATED POWER MODULE (TIPM) 
    NOTE: Before continuing, check the TIPM harness connector terminals for corrosion, damage or terminal push out. Repair as necessary.
    1. Using the schematics as a guide, inspect the wire harness and connectors.
    2. Pay particular attention to all Power and Ground circuits.

      Were any problems found?

      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.