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, Intrusion Transceiver (ITM)
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| B1A20-00 | PRE-ARM TIMEOUT |
| B1A20-00 | - PRE-ARM TIMEOUT (STOP/START) |
| B1A20-00 | - PRE-ARM TIMEOUT (STOP/START DIESEL) |
| B1A3C-00 | INTERNAL SIREN BATTERY |
| B1A3D-00 | SIREN BATTERY TAMPER / LOSS OF POWER SUPPLY |
| B1A3D-00 | - SIREN BATTERY TAMPER / LOSS OF POWER SUPPLY (STOP/START) |
| B1A3D-00 | - SIREN BATTERY TAMPER / LOSS OF POWER SUPPLY (STOP/START DIESEL) |
| B1A3E-00 | SIREN / ITM MISMATCH |
| B1A3E-00 | - SIREN/ITM MISMATCH (STOP/START) |
| B1A3E-00 | - SIREN / ITM MISMATCH (STOP/START DIESEL) |
| B1A3F-00 | ITM ARMING SEQUENCE PERFORMANCE |
| B1A3F-00 | - ITM ARMING SEQUENCE PERFORMANCE (STOP/START) |
| B1A3F-00 | - ITM ARMING SEQUENCE PERFORMANCE (STOP/START DIESEL) |
| B1A88-92 | ULTRASONIC SENSOR CIRCUIT - PERFORMANCE OR INCORRECT OPERATION |
| B210A-84 | SYSTEM VOLTAGE LOW - SIGNAL BELOW ALLOWABLE RANGE |
| B210A-84 | - SYSTEM VOLTAGE LOW - SIGNAL BELOW ALLOWABLE RANGE (STOP/START) |
| B210A-84 | - SYSTEM VOLTAGE LOW - SIGNAL BELOW ALLOWABLE RANGE (STOP/START DIESEL) |
| B210B-85 | SYSTEM VOLTAGE LOW - SIGNAL ABOVE ALLOWABLE RANGE |
| B2206-00 | CURRENT VIN MISSING/MISMATCH |
| B222A-00 | VEHICLE LINE MISMATCH |
| B223C-00 | INTRUSION TRANSCEIVER MODULE INTERNAL |
| 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 |
| U110D-00 | LOST COMMUNICATION WITH SECURITY SIREN |
| U110D-00 | - LOST COMMUNICATION WITH SECURITY SIREN (STOP/START) |
| U110D-00 | - LOST COMMUNICATION WITH SECURITY SIREN (STOP/START DIESEL) |
| U140E-00 | IMPLAUSIBLE VEHICLE CONFIGURATION DATA RECEIVED |
| U1415-00 | IMPLAUSIBLE/MISSING VEHICLE CONFIGURATION DATA |
| U1416-00 | IMPLAUSIBLE SECURITY SIREN SIGNAL RECEIVED |
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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