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 MANUALSJEEP2023COMPASS HIGH ALTITUDEREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTDRIVERS ASSISTANCE SYSTEMS - ADASAUDIO/VIDEO - NON-DTC BASED DIAGNOSTICSDIAGNOSIS AND TESTINGDIAGNOSIS AND TESTING - POOR OR NO AM/FM AUDIO RECEPTIONDIAGNOSTIC TEST
2023 Jeep Compass High Altitude
Diagnostic Test
2023 Jeep Compass High AltitudeSECTION Diagnostic Test
- CHECK THE ANTENNA CONNECTION
- Turn the ignition off.
- Disconnect the Radio C3 harness connector.
- Inspect the Audio Antenna harness connection.
Is the Antenna connection clean and secure?
Yes
- Go To 2
No
- Repair the Antenna connection as needed.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
- RADIO
- Connect the (special tool #9977-6-FM, Antenna) to the Radio C3 component connector.
- Place the test antenna base on the roof of the vehicle.
- Turn the ignition on.
- Drive the vehicle outside to an un-obstructed area.
- Turn the Radio on and select several different known good stations from the AM and FM bands.
- Note any of the following type of reception concerns being heard:
- Silence
- Static
- Noise
- Popping
- Screeching
- Hissing
- Crackling
- Humming
- Weak Signal
- Interference
- Motor Sound
Is the audio reception still poor or not available?
Yes
- Replace the Radio in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
No
- Go To 3
- ANTENNA
- Turn the ignition off.
- Reconnect the Radio C3 harness connector.
- Disconnect the Radio Antenna harness connector.
- Connect the (special tool #9977-6-FM, Antenna) to the Radio Antenna harness connector.
- Turn the Radio on and select several different known good stations from the AM and FM bands.
- Note any of the following type of reception concerns being heard:
- Silence
- Static
- Noise
- Popping
- Screeching
- Hissing
- Crackling
- Humming
- Weak Signal
- Interference
- Motor Sound
Is the audio reception still poor or not available?
Yes
- Go To 4
No
- Replace the Radio Antenna in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
- ANTENNA CABLE
- Turn the ignition off.
- Disconnect the (special tool #9977-6-FM, Antenna) from the Radio Antenna harness connector.
- Connect the appropriate (special tool #9977-6-4, Jumper) (1) or (special tool #9977-6-2, Jumper) (1) to the Radio Antenna harness connector (2) at the Antenna.
- Disconnect the Radio C3 harness connector.
- Connect the appropriate (special tool #9977-6-1, Adapter) (1) or (special tool #9977-6-3, Adapter) (1) to the Radio C3 harness connector (2).
- Measure the resistance across the tool terminals.
Is the resistance between 47.5 and 52.5 Ohms?
Yes
- The source of the poor reception is not caused by the Radio, Antenna Cable or Radio Antenna.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
No
- Replace the Antenna Cable in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
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.