SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSJEEP2023CHEROKEE ALTITUDE LUXREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTENTERTAINMENT SYSTEMS(ACTIVE NOISE CANCELLATION MODULE (ANC) - ELECTRICAL DIAGNOSTICS)DTC TROUBLESHOOTINGB143F-13-ANC MICROPHONE 4-CIRCUIT OPENDIAGNOSTIC TEST
2023 Jeep Cherokee Altitude LUX

Diagnostic Test

2023 Jeep Cherokee Altitude LUXSECTION Diagnostic Test
  1. CHECK FOR AN ACTIVE DTC 
    NOTE:

    Verify the connection of the ANC Microphone 4 harness connector.

    1. Turn the ignition on.
    2. With the scan tool, read DTCs.

      Is the DTC active?

      Yes 

      • Go To  2

      No 

      • The condition or conditions that originally set this DTC are not present at this time. Using the appropriate 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. If no problems are found, test complete.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  2. CHECK THE ANC MICROPHONE 4 
    1. Turn the ignition off.
    2. Disconnect the ANC Microphone 4 harness connector
    3. Connect a jumper wire between the (X477) ANC Microphone 4 (-) and the (X476) ANC Microphone 4 (+) circuit at the ANC Microphone 4 harness connector.
    4. Turn the ignition on.
    5. With the scan tool, read DTCs.
      NOTE:

      B143F-2B-ANC MICROPHONE 4-WIRES SHORTED TOGETHER should display as active as a result of this test.

      Does the scan tool display: B143F-13-ANC MICROPHONE 4-CIRCUIT OPEN as active?

      Yes 

      • Go To  3

      No 

      • Replace the ANC Microphone 4 in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  3. CHECK THE (X476) ANC MICROPHONE 4 (+) CIRCUIT FOR AN OPEN 
    1. Turn the ignition off.
    2. Disconnect the ANC Module C2 harness connector.
    3. Measure the resistance of the (X476) ANC Microphone 4 (+) circuit between the ANC Microphone 4 harness connector and ANC C2 harness connectors.

      Is the resistance below 3.0 Ohms??

      Yes 

      • Go To  4

      No 

      • Repair the (X476) ANC Microphone 4 (+) circuit for an open.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  4. CHECK THE (X477) ANC MICROPHONE 4 (-) CIRCUIT FOR AN OPEN 
    1. Measure the resistance of the (X477) ANC Microphone 4 (-) circuit between the ANC Microphone 4 harness connector and ANC Module C2 harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      No 

      • Repair the (X477) ANC Microphone 4 (-) circuit for an open or high resistance.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.