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.
2009 Jeep Patriot Limited, EDG, Automatic CVTFACTORY OEM SERVICE PROCEDURE
Intrusion Transceiver Module (ITM) - Electrical Diagnostics
| DTC | Description |
|---|---|
| B1A20 | PRE-ARM TIMEOUT |
| B1A3C | INTERNAL SIREN BATTERY |
| B1A3D | SIREN BATTERY TAMPER/LOSS OF POWER SUPPLY |
| B1A3E | SIREN/ITM MISMATCH |
| B1A3F | ITM ARMING SEQUENCE PERFORMANCE |
| B2206 | CURRENT VIN MISSING/MISMATCH |
| B222A | VEHICLE LINE MISMATCH |
| B223C | INTRUSION TRANSCEIVER MODULE INTERNAL |
| U0019 | CAN B BUS |
| U0151 | LOST COMMUNICATION WITH OCCUPANT RESTRAINT CONTROLLER |
| U0155 | LOST COMMUNICATION WITH CLUSTER/CCN |
| U110D | LOST COMMUNICATION WITH SECURITY SIREN |
| U1416 | 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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