What it means
The control module monitors the voltage on the restraint deployment signal circuit. It sets this code when the signal is above the expected range; the code alone does not identify which restraint or system component is affected.
At a glance
- Usually lights the check-engine light
How it works
The restraint control module monitors voltage on a deployment signal circuit. This code sets when the signal rises above its expected range, which can indicate a short to a supply source; it does not specify which restraint component is affected.
Common causes
Most likely first.
- Signal shorted to supply
- Connector pins corroded - high contact resistance
- Supply wire pinched against B+ source
Symptoms
- Airbag or restraint warning light
- A restraint system fault message may appear
- Restraint system operation may be affected
How to diagnose it
- Read restraint-module codes and available event data with a scan tool that supports the vehicle's restraint system.
- Use the manufacturer's wiring information to identify the deployment signal circuit named by the fault.
- Inspect accessible wiring and connectors for pinching, chafing, corrosion, or a terminal contacting an unintended power source.
- Have the identified circuit checked for a short to supply using the manufacturer's restraint-system safety procedure.
- If the wiring is intact, test the connected restraint component and control module for an internal fault raising the signal.
Common fixes
- Repair pinched or damaged signal wiring that is shorted to supply.
- Restore correct connector terminal position and contact on the affected circuit.
- Replace a restraint component confirmed to be driving the signal above range.
- Repair or replace the restraint control module only after its internal fault is confirmed.
Can I keep driving?
The restraint warning indicates airbag or other restraint protection may be reduced or unavailable in a crash. Arrange prompt diagnosis and avoid disturbing restraint wiring; follow the manufacturer's safety procedure for any inspection.
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.