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.
2021 Jeep Compass TrailhawkFACTORY OEM SERVICE PROCEDURE
Radio (RRM)
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| B1400-11 | FRONT LEFT AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO GROUND-BASE |
| B1400-11 | FRONT LEFT AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO GROUND-PREMIUM |
| B1400-12 | FRONT LEFT AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO BATTERY-BASE |
| B1400-12 | FRONT LEFT AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO BATTERY-PREMIUM |
| B1400-13 | FRONT LEFT AUDIO SPEAKER OUTPUT-CIRCUIT OPEN-BASE |
| B1400-13 | FRONT LEFT AUDIO SPEAKER OUTPUT-CIRCUIT OPEN-PREMIUM |
| B1400-1A | FRONT LEFT AUDIO SPEAKER OUTPUT-CIRCUIT RESISTANCE BELOW THRESHOLD-BASE |
| B1400-1A | FRONT LEFT AUDIO SPEAKER OUTPUT-CIRCUIT RESISTANCE BELOW THRESHOLD-PREMIUM |
| B1404-11 | FRONT RIGHT AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO GROUND-BASE |
| B1404-11 | FRONT RIGHT AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO GROUND-PREMIUM |
| B1404-12 | FRONT RIGHT AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO BATTERY-BASE |
| B1404-12 | FRONT RIGHT AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO BATTERY-PREMIUM |
| B1404-13 | FRONT RIGHT AUDIO SPEAKER OUTPUT-CIRCUIT OPEN-BASE |
| B1404-13 | FRONT RIGHT AUDIO SPEAKER OUTPUT-CIRCUIT OPEN-PREMIUM |
| B1404-1A | FRONT RIGHT AUDIO SPEAKER OUTPUT-CIRCUIT RESISTANCE BELOW THRESHOLD-BASE |
| B1404-1A | FRONT RIGHT AUDIO SPEAKER OUTPUT-CIRCUIT RESISTANCE BELOW THRESHOLD-PREMIUM |
| B1408-11 | REAR LEFT AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO GROUND-BASE |
| B1408-11 | REAR LEFT AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO GROUND-PREMIUM |
| B1408-12 | REAR LEFT AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO BATTERY-BASE |
| B1408-12 | REAR LEFT AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO BATTERY-PREMIUM |
| B1408-13 | REAR LEFT AUDIO SPEAKER OUTPUT-CIRCUIT OPEN-BASE |
| B1408-13 | REAR LEFT AUDIO SPEAKER OUTPUT-CIRCUIT OPEN-PREMIUM |
| B1408-1A | REAR LEFT AUDIO SPEAKER OUTPUT-CIRCUIT RESISTANCE BELOW THRESHOLD-BASE |
| B1408-1A | REAR LEFT AUDIO SPEAKER OUTPUT-CIRCUIT RESISTANCE BELOW THRESHOLD-PREMIUM |
| B140C-11 | REAR RIGHT AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO GROUND-BASE |
| B140C-11 | REAR RIGHT AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO GROUND-PREMIUM |
| B140C-12 | REAR RIGHT AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO BATTERY-BASE |
| B140C-12 | REAR RIGHT AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO BATTERY-PREMIUM |
| B140C-13 | REAR RIGHT AUDIO SPEAKER OUTPUT-CIRCUIT OPEN-BASE |
| B140C-13 | REAR RIGHT AUDIO SPEAKER OUTPUT-CIRCUIT OPEN-PREMIUM |
| B140C-1A | REAR RIGHT AUDIO SPEAKER OUTPUT-CIRCUIT RESISTANCE BELOW THRESHOLD-BASE |
| B140C-1A | REAR RIGHT AUDIO SPEAKER OUTPUT-CIRCUIT RESISTANCE BELOW THRESHOLD-PREMIUM |
| B142A-4B | RADIO UNIT HIGH TEMPERATURE-OVER TEMPERATURE |
| B143A-11 | MICROPHONE 1-CIRCUIT SHORT TO GROUND |
| B143A-12 | MICROPHONE 1-CIRCUIT SHORT TO BATTERY |
| B143A-13 | MICROPHONE 1-CIRCUIT OPEN |
| B143D-11 | MICROPHONE 2-CIRCUIT SHORT TO GROUND |
| B143D-12 | MICROPHONE 2 - CIRCUIT SHORT TO BATTERY |
| B143D-13 | MICROPHONE 2 - CIRCUIT OPEN |
| B14DA-2A | HEAD UNIT BUTTON - STUCK |
| B156B-01 | SATELLITE RADIO ANTENNA-GENERAL ELECTRICAL FAILURE |
| B156B-1A | SATELLITE RADIO ANTENNA - CIRCUIT RESISTANCE BELOW THRESHOLD |
| B1570-09 | USB COMMUNICATION-COMPONENT FAILURES |
| B1570-19 | USB CONNECTION - CIRCUIT CURRENT ABOVE THRESHOLD |
| B1578-11 | AUDIO ANTENNA - CIRCUIT SHORT TO GROUND |
| B1578-12 | AUDIO ANTENNA - CIRCUIT SHORT TO VOLTAGE |
| B1578-13 | AM/FM ANTENNA - CIRCUIT OPEN |
| B1578-1A | AM/FM ANTENNA - CIRCUIT RESISTANCE BELOW THRESHOLD |
| B1579-11 | DIVERSITY ANTENNA-CIRCUIT SHORT TO GROUND |
| B1579-12 | DIVERSITY ANTENNA-CIRCUIT SHORT TO BATTERY |
| B1579-13 | DIVERSITY ANTENNA - CIRCUIT OPEN |
| B1579-1A | DIVERSITY ANTENNA - CIRCUIT RESISTANCE BELOW THRESHOLD |
| B157A-13 | DAB ANTENNA - CIRCUIT OPEN |
| B157A-1A | DAB ANTENNA - CIRCUIT RESISTANCE BELOW THRESHOLD |
| B2199-16 | BATTERY VOLTAGE - CIRCUIT VOLTAGE BELOW THRESHOLD |
| B2199-17 | BATTERY VOLTAGE - CIRCUIT VOLTAGE ABOVE THRESHOLD |
| B2206-00 | CURRENT VIN MISSING / MISMATCH |
| B22AB-00 | LIN STEERING WHEEL SWITCH INTERNAL |
| B22AB-23 | LIN STEERING WHEEL SWITCHES - SIGNAL STUCK LOW |
| B221E-00 | RADIO INTERNAL - NO SUBTYPE INFORMATION |
| U0010-00 | CAN INTERIOR BUS |
| U0011-00 | CAN INTERIOR BUS OFF PERFORMANCE |
| U0140-00 | LOST COMMUNICATION WITH BODY CONTROL MODULE |
| U0155-00 | LOST COMMUNICATION WITH CLUSTER-CCN |
| U0186-00 | LOST COMMUNICATION WITH AUDIO AMPLIFIER |
| U0232-00 | LOST COMMUNICATION WITH BLIND SPOT DETECTION MODULE |
| U0422-00 | IMPLAUSIBLE DATA RECEIVED FROM BODY CONTROL MODULE |
| U0423-00 | IMPLAUSIBLE DATA RECEIVED FROM CLUSTER-CCN |
| U0487-00 | IMPLAUSIBLE DATA RECEIVED FROM AUDIO AMPLIFIER |
| U1176-00 | LOST COMMUNICATION WITH EMERGENCY ALERT MODULE |
| U11FA-00 | LOST COMMUNICATION WITH RIGHT BLIND SPOT SENSOR |
| U11FB-00 | LOST COMMUNICATION WITH LEFT BLIND SPOT SENSOR |
| U1478-00 | IMPLAUSIBLE DATA RECEIVED FROM EMERGENCY ALERT MODULE |
| U147D-00 | IMPLAUSIBLE DATA RECEIVED FROM RIGHT BLIND SPOT SENSOR |
| U147E-00 | IMPLAUSIBLE DATA RECEIVED FROM LEFT BLIND SPOT SENSOR |
Factory Service Tools
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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.
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