SRS Lost Communication with Right Side Restraint Module
The U0153 code indicates that the Supplemental Restraint System (SRS) control module has lost serial data communication with the right side restraint control module over the CAN bus. This satellite module, typically located in the right seat, door, or side panel, manages the impact sensors and actuators for the side airbag and/or seatbelt pretensioner on the right side. The network interruption prevents the main SRS module from receiving collision status information and commanding deployment of right-side restraint devices during an impact, leaving occupants without effective side protection.
1. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.
2. Most Common Causes
- Internal failure of the right side restraint control module (satellite module)
- Open or shorted CAN bus (+) or (-) circuit in the branch to the right side module (short to power, ground, or each other)
- Right side restraint module connector disconnected, corroded, or with bent/damaged pins due to moisture
- Loss of reference voltage or poor ground to the right side module (blown fuse, broken wire, corroded ground terminal)
- Internal failure of the main SRS control module preventing processing of CAN bus messages
3. Symptoms You Will Notice
- Airbag warning light illuminated on the dashboard
- Side airbag and/or seatbelt pretensioner on the right side may not deploy in a collision
4. Step-by-Step Diagnosis
Scan the SRS system for all stored codes and freeze frame data
Visually inspect the right side restraint module connector for damage, corrosion, or loose pins
Check for battery voltage and ground at the right side module connector
Test the CAN bus circuits (CAN High and CAN Low) for continuity, shorts, and proper resistance (typically 60 ohms between the two lines at the module)
If all wiring and power checks pass, suspect a failed right side restraint module or main SRS module; perform module communication test with a scan tool
5. Frequently Asked Questions
Is it safe to drive?▼
No, it is not safe to drive. The right side airbag and seatbelt pretensioner may not deploy in a crash, significantly increasing injury risk. Have the vehicle towed to a repair shop.
How much does it cost to fix?▼
Diagnosis typically costs $100-$200. Repair costs vary: a wiring repair may be $150-$400, while replacing a side restraint module can range from $300-$800 including labor and parts.