Air Bag Electronic Crash Sensor (ECS) Module
The air bag electronic crash sensor (ECS) module:

discriminates between an event that warrants frontal air bag deployment and an event that does not.
signals the inflators to deploy the air bags in the event of a deployable crash.
monitors the air bag supplemental restraint system (SRS) for faults.
illuminates the air bag indicator if a fault is detected.
flashes the air bag indicator to indicate the lamp fault code (LFC) detected.
communicates through the data link connector (DLC) the current and historical diagnostic trouble codes (DTCs).
activates a chime in the Generic Electronic Module (GEM) if the air bag indicator is not available and another SRS system fault exists.

Component Location



Item Part Number Description
1 043B13 Driver Air Bag Module
2 — Air Bag Warning Indicator (Part of 04320)
3 14B321 Air Bag Electronic Crash Sensor (ECS) Module
4 044A74 Passenger Air Bag Module
================================================== ========
Module, Air Bag Electronic Crash Sensor (ECS)
Removal

WARNING: TO AVOID ACCIDENTAL DEPLOYMENT AND POSSIBLE PERSONAL INJURY, THE BACKUP POWER SUPPLY MUST BE DEPLETED BEFORE REPAIRING OR REPLACING ANY FRONT OR SIDE AIR BAG SUPPLEMENTAL RESTRAINT SYSTEM (SRS) COMPONENTS AND BEFORE SERVICING, REPLACING, ADJUSTING OR STRIKING COMPONENTS NEAR THE FRONT OR SIDE AIR BAG SENSORS, SUCH AS DOORS, INSTRUMENT PANEL, CONSOLE, DOOR LATCHES, STRIKERS, SEATS AND HOOD LATCHES.

PLEASE REFER TO THE APPROPRIATE VEHICLE SHOP MANUAL TO DETERMINE LOCATION OF THE FRONT AIR BAG SENSORS.

THE SIDE AIR BAG SENSORS ARE LOCATED AT OR NEAR THE BASE OF THE B-PILLAR.

TO DEPLETE THE BACKUP POWER SUPPLY ENERGY, DISCONNECT THE BATTERY GROUND CABLE AND WAIT AT LEAST ONE MINUTE. BE SURE TO DISCONNECT AUXILIARY BATTERIES AND POWER SUPPLIES (IF EQUIPPED).

WARNING: THE AIR BAG ELECTRONIC CRASH SENSOR (ECS) ORIENTATION IS CRITICAL FOR CORRECT SYSTEM OPERATION. IF A VEHICLE EQUIPPED WITH AN AIR BAG SUPPLEMENTAL RESTRAINT SYSTEM (SRS) HAS BEEN INVOLVED IN A COLLISION IN WHICH THE CENTER TUNNEL AREA HAS BEEN DAMAGED, INSPECT THE MOUNTING AND BRACKET FOR DEFORMATION. IF DAMAGED, THE ECS MUST BE REPLACED WHETHER OR NOT THE AIR BAGS HAVE DEPLOYED. IN ADDITION, MAKE SURE THE AREA OF THE ECS MOUNTING IS RESTORED TO ITS ORIGINAL CONDITION.

CAUTION: Electronic modules are sensitive to static electrical charges. If exposed to these charges, damage can result.

NOTE: Repair is made by installing a new part only. If the new part does not correct the condition, install the original part and perform the diagnostic procedure again.



Disconnect the battery ground cable (14301) and wait at least one minute.
Pull back the floor carpet from underneath the instrument panel at the center tunnel and position out of the way.
Disconnect the air bag electronic crash sensor (ECS) module electrical connector locking clip and electrical connector.
Remove the ECS module retaining nuts.
Remove the ECS module.


Installation

WARNING: THE TIGHTENING TORQUE OF THE AIR BAG ELECTRONIC CRASH SENSOR (ECS) MODULE RETAINING NUTS IS CRITICAL FOR PROPER SYSTEM OPERATION.NOTE: Repair is made by installing a new part only. If the new part does not correct the condition, install the original part and perform the diagnostic procedure again.



NOTE: Make sure to tighten the retaining nuts to specification.



NOTE: When the battery (10655) has been disconnected and reconnected, some abnormal drive symptoms may occur while the powertrain control module (PCM) (12A650) relearns its adaptive strategy. The vehicle may need to be driven 16 km (10 miles) or more to relearn the strategy.



Follow the removal procedure in reverse order.
Prove out the air bag system.

--------------------------------------------------------------------------------