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 Grand Cherokee TrackhawkFACTORY OEM SERVICE PROCEDURE
Module, Emergency Assistance (EAM)
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| B1401-11 | EMERGENCY CALL SPEAKER-CIRCUIT SHORT TO GROUND |
| B1401-12 | EMERGENCY CALL SPEAKER-CIRCUIT SHORT TO BATTERY |
| B1401-13 | EMERGENCY CALL SPEAKER-CIRCUIT OPEN |
| B1401-2B | EMERGENCY CALL SPEAKER-WIRES SHORTED TOGETHER |
| B143A-11 | MICROPHONE 1-CIRCUIT SHORT TO GROUND |
| B143A-12 | MICROPHONE 1-CIRCUIT SHORT TO BATTERY |
| B143A-13 | MICROPHONE 1-CIRCUIT OPEN |
| B143A-2B | MICROPHONE 1-WIRES SHORTED TOGETHER |
| B1552-11 | EMERGENCY CALL BUTTON-CIRCUIT SHORT TO GROUND |
| B1552-12 | EMERGENCY CALL BUTTON-CIRCUIT SHORT TO BATTERY |
| B1552-13 | EMERGENCY CALL BUTTON-CIRCUIT OPEN |
| B1552-2A | EMERGENCY CALL BUTTON-STUCK |
| B1555-11 | EMERGENCY CALL BUTTON BACKLIGHT LED CONTROL-CIRCUIT SHORT TO GROUND |
| B1555-12 | - EMERGENCY CALL BUTTON BACKLIGHT LED CONTROL-CIRCUIT SHORT TO BATTERY |
| B1555-13 | - EMERGENCY CALL BUTTON BACKLIGHT LED CONTROL-CIRCUIT OPEN |
| B1556-11 | RED EMERGENCY CALL LED CONTROL-CIRCUIT SHORT TO GROUND |
| B1556-12 | - RED EMERGENCY CALL LED CONTROL-CIRCUIT SHORT TO BATTERY |
| B1556-13 | - RED EMERGENCY CALL LED CONTROL-CIRCUIT OPEN |
| B1557-11 | GREEN EMERGENCY CALL LED CONTROL-CIRCUIT SHORT TO GROUND |
| B1557-12 | - GREEN EMERGENCY CALL LED CONTROL-CIRCUIT SHORT TO BATTERY |
| B1557-13 | - GREEN EMERGENCY CALL LED CONTROL-CIRCUIT OPEN |
| B1560-11 | CELLULAR ANTENNA 1-CIRCUIT SHORT TO GROUND |
| B1560-13 | CELLULAR ANTENNA 1-CIRCUIT OPEN |
| B1562-11 | - GPS ANTENNA-CIRCUIT SHORT TO GROUND |
| B1562-13 | - GPS ANTENNA-CIRCUIT OPEN |
| B1E21-16 | BACKUP BATTERY-CIRCUIT VOLTAGE BELOW THRESHOLD |
| B210D-16 | BATTERY VOLTAGE LOW-CIRCUIT VOLTAGE BELOW THRESHOLD |
| B210E-17 | BATTERY VOLTAGE HIGH-CIRCUIT VOLTAGE ABOVE THRESHOLD |
| B21DD-84 | SYSTEM VOLTAGE-SIGNAL BELOW ALLOWABLE RANGE |
| B21DD-85 | SYSTEM VOLTAGE-SIGNAL ABOVE ALLOWABLE RANGE |
| B22A9-00 | - ECU INTERNAL PERFORMANCE |
| B273C-23 | - DIGITAL CRASH INPUT-SIGNAL STUCK LOW |
| B273C-24 | - DIGITAL CRASH INPUT-SIGNAL STUCK HIGH |
| B273C-87 | DIGITAL CRASH INPUT-MISSING MESSAGE |
| U0001-00 | CAN C BUS |
| U0002-00 | CAN C BUS OFF PERFORMANCE |
| U0010-00 | CAN INTERIOR BUS |
| U0011-00 | CAN INTERIOR BUS OFF PERFORMANCE |
| U0121-00 | LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE |
| U0129-00 | LOST COMMUNICATION WITH BRAKE SYSTEM CONTROL MODULE 1 |
| U0140-00 | LOST COMMUNICATION WITH BODY CONTROL MODULE |
| U0151-00 | LOST COMMUNICATION WITH OCCUPANT RESTRAINT CONTROLLER (ORC) |
| U0155-00 | LOST COMMUNICATION WITH CLUSTER-CCN |
| U0422-00 | IMPLAUSIBLE DATA RECEIVED FROM BODY CONTROL MODULE |
| U0423-00 | IMPLAUSIBLE DATA RECEIVED FROM CLUSTER-CCN |
| U0452-00 | IMPLAUSIBLE DATA RECEIVED FROM RESTRAINTS CONTROL MODULE |
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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