Pinpoint Test 7: DTC B2294 - Restraint System - Curtain fault

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PINPOINT TEST 7: DTC B2294 - RESTRAINT SYSTEM - CURTAIN FAULT

Normal Operation

The restraints control module (RCM) monitors all safety canopy module circuits for faults. The RCM will set a DTC if a short to battery or short to ground fault is detected. The RCM will also set a DTC if the loop resistance is less than 0.9 ohm or greater than 5.0 ohms. The normal expected resistance range is 1.31 to 4.29 ohms. If a loop resistance is between 0.9 and 1.31 or between 4.29 and 5.0 ohms, a DTC may or may not set, yet there exists a strong potential for an intermittent fault. If the RCM detects a fault on any of the safety canopy module circuits, it will store DTC B2294 in memory and send a message to the instrument cluster module to illuminate the air bag warning indicator.

- Fault PIDs that end in OD indicate an on-demand status and are associated with on-demand DTC B2294. Fault PIDs that end in CM indicate continuous monitor status and are associated with continuous DTC B2294.

Possible Causes
- Wiring, terminals or connectors
- Safety canopy module
- RCM

Diagnostic Procedure

WARNING: Always wear eye protection when servicing a vehicle. Failure to follow this instruction may result in serious personal injury.

WARNING: Do not handle, move or change the original horizontal mounting position of the restraints control module (RCM) while the RCM is connected and the ignition switch is ON. Failure to follow this instruction may result in the accidental deployment of the safety canopy and cause serious personal injury or death.

WARNING: Never probe the electrical connectors on air bag, safety canopy or side air curtain modules. Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

CAUTION: Use the correct probe adapter(s) when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTE: The supplemental restraint system (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.

NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.