Test Notes

Normal Operation
The air bag Electronic Crash Sensor (ECS) module monitors the backup power supply, accelerometer operation and memory. If the ECS detects a failure in any of these components, it will store a Diagnostic Trouble Code (DTC) B1342 in memory and flash a Lamp Fault Code (LFC) 24 on the air bag indicator.

Possible Causes
An ECS module internal fault could be caused by:
^ the internal accelerometer not operating properly.
^ the backup power supply not operating properly.
^ an internal module circuit fault detected.
^ a microcontroller RAM/ROM/EEPROM failure.