What it means
A control module has stopped receiving expected messages from the left side restraints control module. Restraint functions associated with that module may be limited or unavailable.
At a glance
- Usually lights the warning light of the system that lost communication
How it works
The left side restraints control module handles restraint-system information for the vehicle's designated left-side section and communicates it to other controllers over the network. U0152 sets when expected messages from that left-side module are missing, potentially leaving its associated restraint functions unavailable.
Common causes
Most likely first.
- Left side restraints control module power or ground fault
- Damaged network wiring or connector
- Left side restraints control module failure
- Low system voltage
Symptoms
- Airbag or SRS warning
- Restraint system functions may be unavailable
- Other communication codes
How to diagnose it
- Scan all modules and record SRS and communication codes to confirm that the missing response is from the left side restraints control module.
- Check the 12-volt battery and charging system, since low voltage can cause restraint modules to drop off the network.
- Visually inspect accessible connectors and harnesses associated with the left-side module for damage or corrosion, without probing or unplugging restraint circuits.
- Use the vehicle-specific wiring diagram and safety procedure to check the left module's specified power, ground, and fuses.
- Test the network connection to the left-side module using the manufacturer's procedure if its supplies are correct.
- If power, ground, and network pass, verify module response and any required configuration with suitable SRS-capable equipment.
Common fixes
- Restore a weak 12-volt battery or repair its charging-system fault.
- Replace a blown fuse or repair a verified power or ground fault to the left side module.
- Repair damaged network wiring or connectors following the vehicle's restraint-system safety procedure.
- Correct a confirmed network routing or configuration issue affecting the left module.
- Replace or configure the left side restraints control module only after its circuits have been verified.
Can I keep driving?
The airbag or SRS warning means restraint protection associated with the left side may be unavailable in a crash. Limit driving and arrange prompt diagnosis; avoid working on restraint wiring unless trained and following the vehicle's safety procedure.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.