B: LFC 14/DTC B1914 - Primary Crash Sensor Short to Ground

Normal Operation
The primary crash sensor is used by the air bag Electronic Crash Sensor (ECS) module to monitor the severity of a crash event. If the event is severe, the sensor will close and provide the ECS with a signal to activate the air bag modules and safety belt pretensioners. The ECS continually monitors this sensor. If the sensor is shorted to ground, the ECS will disregard the false signal, store a DTC, and illuminate the air bag indicator. The ECS will still activate the air bag modules and safety belt pretensioners in a deployable crash event.

The ECS measures the voltage at Pin C200-6, Circuit 619 (PK/W). If there is a short to ground on this circuit, the ECS will store DTC B1914 in memory and flash LFC 15 (or higher priority code if one exists) on the air bag indicator.

Possible Causes
A primary crash sensor shorted to ground can be caused by:
- a short to ground on Circuit 619 (PK/W).
- a short to ground inside the ECS module.

Pinpoint Test Steps:

B1 - B2:

B3 - B4:

B5: