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 MANUALSJEEP2011COMPASS BASE, 2.4 B, AWD, AUTOMATIC CVT, CVT3REPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESCOMMUNICATION - NON-DTC BASED DIAGNOSTICSDIAGNOSIS AND TESTINGNO RESPONSE FROM HVAC (A/C HEATER CONTROL)DIAGNOSTIC TEST

2011 Jeep Compass Base, 2.4 B, AWD, Automatic CVT, CVT3

Diagnostic Test

2011 Jeep Compass Base, 2.4 B, AWD, Automatic CVT, CVT3SECTION Diagnostic Test

TEST FOR INTERMITTENT CONDITION
NOTE:
Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.
1. Turn the ignition on.
  NOTE:
  Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.
2. With the scan tool, select ECU View.
  NOTE:
  A red "X" will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.
  
  Does the scan tool display a red "X" next to the module?
  
  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.
(Z903) GROUND CIRCUIT OPEN

Fig 1: Checking Ground Circuit Using 12-Volt Test Light Connected To 12-Volts
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the A/C Heater Control C1 harness connector.
3. Using a 12-volt test light connected to 12-volts check the (Z903) Ground circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 3.
  No
  - Repair the open in the (Z903) Ground circuit.
  - Perform the BODY VERIFICATION TEST. Refer to Standard Procedure .
(A417) FUSED B+ (I.O.D.) CIRCUIT OPEN OR SHORTED

Fig 2: Checking Fused B (+) (I.O.D.) Circuit Using 12-Volt Test Light Connected To Ground
Courtesy of CHRYSLER LLC
1. Using a 12-volt test light connected to ground, check the (A417) Fused B+ (I.O.D.) circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 4.
  No
  - Repair the open or short in the (A417) Fused B+ (I.O.D.) circuit.
  - Perform the BODY VERIFICATION TEST. Refer to Standard Procedure .
(F929) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR SHORTED

Fig 3: Checking Fused Ignition Switch Output (RUN) Circuit Using 12-Volt Test Light Connected To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (F929) Fused Ignition Switch Output (RUN) circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 5.
  No
  - Repair the open or short in the (F929) Fused Ignition Switch Output (RUN) circuit.
  - Perform the BODY VERIFICATION TEST. Refer to Standard Procedure .
(D55) AND (D54) CAN B BUS CIRCUITS OPEN

Fig 4: Measuring Voltage Between Ground & (D54/D55) CAN B Bus (-/+) Circuit
Courtesy of CHRYSLER LLC

RENDER: 1.0x

NO RELATED

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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.