Test M: LFC 42, 43, and 44/DTC B2296 - Restraint System - Impact Sensor Status

PINPOINT TEST M: LFC 42, 43, AND 44/DTC B2296 - RESTRAINT SYSTEM - IMPACT SENSOR STATUS

M1-M3:

M3-M6:

M6-M8:

M8-M9:

M10-M13:

M13-M16:

M16-M18:

M18-M19:

M20-M23:

M23-M26:

M26-M28:

M28-M29:

M30-M32:

M33-M34:

Normal Operation
The impact sensor(s) provide data to the RCM for use in calculating impact severity. This is accomplished using various electrical and electro-mechanical sensor(s) throughout the vehicle.

The restraints control module (RCM) checks all of the impact sensor circuits for faults. If the RCM detects one of the following faults on any of the impact sensor circuits, it will store diagnostic trouble code (DTC) B2296 in memory and flash either lamp fault code (LFC) 42, 43, or 44 depending on the fault (or higher priority code if one exists) on the air bag indicator.

Fault Conditions
The RCM monitors for the following fault conditions:
- mounting resistance high
- low resistance (short) between FEED and return circuits
- circuit open
- circuit short to battery
- circuit short to ground

Possible Causes
A front impact severity sensor status fault can be caused by:
- wiring, terminals, or connectors.
- a faulty front impact severity sensor.
- incorrect front impact severity sensor mounting.
- a faulted RCM.

A side impact sensor status fault can be caused by:
- wiring, terminals, or connectors.
- a faulty side impact sensor.
- incorrect side impact sensor mounting.
- a faulty RCM.