Q: LFC 27/DTC B1890- Pass AB Deact. Sw Warn Lamp Short to Batt

Normal Operation
The air bag Electronic Crash Sensor (ECS) module has the ability to deactivate the passenger air bag under certain conditions. When the passenger air bag is deactivated, the Passenger Air Bag Deactivation (PAD) switch warning lamp will be illuminated.

The ECS monitors the PAD switch warning lamp for short to battery conditions. If the ECS detects a short to battery condition on the PAD switch warning lamp circuit, it will store a Diagnostic Trouble Code (DTC) B1890 in memory and flash a Lamp Fault Code (LFC) 27 (or higher priority code if one exists) on the air bag indicator.

Possible Causes
- A short to battery on Circuit 1113 (Y/LG).
- A damaged or inoperative PAD switch.
- A damaged or inoperative ECS module.

Pinpoint Test Steps:

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Q5: