Impact Sensor: Service and Repair

REMOVAL

WARNING:
- ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIRBAG, SEAT BELT TENSIONER, FRONT IMPACT SENSORS, SIDE CURTAIN AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
- THE FRONT IMPACT SENSOR ENABLES THE SYSTEM TO DEPLOY THE FRONT SUPPLEMENTAL RESTRAINTS. NEVER STRIKE OR DROP THE FRONT IMPACT SENSOR, AS IT CAN DAMAGE THE IMPACT SENSOR OR AFFECT ITS CALIBRATION. IF AN IMPACT SENSOR IS ACCIDENTALLY DROPPED DURING SERVICE, THE SENSOR MUST BE SCRAPPED AND REPLACED WITH A NEW UNIT. FAILURE TO OBSERVE THIS WARNING COULD RESULT IN ACCIDENTAL, INCOMPLETE, OR IMPROPER FRONT SUPPLEMENTAL RESTRAINT DEPLOYMENT AND POSSIBLE OCCUPANT INJURIES.

1. Disconnect and isolate the battery negative cable. Wait two minutes for the system capacitor to discharge before hirther service.

Fig.18 Front Impact Sensor Remove/Install:

2. Remove the two screws that secure the right or left front impact sensor, left impact sensor and shim (2.4L engine only), or left impact sensor and bracket unit (diesel engine only) to the back of the right or left radiator support vertical member.
3. Disconnect the headlamp and dash wire harness connector for the front impact sensor from the sensor connector receptacle.
4. Remove the right or left front impact sensor, left impact sensor and shim (2.4L engine only), or left impact sensor and bracket unit (diesel engine only) from the engine compartment.

INSTALLATION

WARNING:
- ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIRBAG, SEAT BELT TENSIONER, FRONT IMPACT SENSORS, SIDE CURTAIN AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
- THE FRONT IMPACT SENSOR ENABLES THE SYSTEM TO DEPLOY THE FRONT SUPPLEMENTAL RESTRAINTS. NEVER STRIKE OR DROP THE FRONT IMPACT SENSOR, AS IT CAN DAMAGE THE IMPACT SENSOR OR AFFECT ITS CALIBRATION. IF AN IMPACT SENSOR IS ACCIDENTALLY DROPPED DURING SERVICE, THE SENSOR MUST BE SCRAPPED AND REPLACED WITH A NEW UNIT. FAILURE TO OBSERVE THIS WARNING COULD RESULT IN ACCIDENTAL, INCOMPLETE, OR IMPROPER FRONT SUPPLEMENTAL RESTRAINT DEPLOYMENT AND POSSIBLE OCCUPANT INJURIES.

1. Position the right or left front impact sensor, left impact sensor and shim (2.4L engine only), or left impact sensor and bracket unit (diesel engine only) into the engine compartment.
2. Reconnect the headlamp and dash wire harness connector for the front impact sensor to the sensor connector receptacle.
3. Position the right or left front impact sensor, left impact sensor and shim (2.4L engine only), or left impact sensor and bracket unit (diesel engine only) onto the back of the right or left radiator support vertical member.
4. Loosely install the upper screw that secures the right or left front impact sensor, left impact sensor and shim (2.4L engine only), or left impact sensor and bracket unit (diesel engine only) to the back of the right or left radiator support vertical member.
5. Install and tighten the lower screw that secures the right or left front impact sensor, left impact sensor and shim (2.4L engine only), or left impact sensor and bracket unit (diesel engine only) to the back of the right or left radiator support vertical member. Tighten the screw to 7 Nm (65 in. lbs.).
6. Tighten the upper screw that secures the right or left front impact sensor, left impact sensor and shim (2.4L engine only), or left impact sensor and bracket unit (diesel engine only) to the back of the right or left radiator support vertical member. Tighten the screw to 7 Nm (65 in. lbs.).
7. Do not reconnect the battery negative cable at this time. The airbag system verification test procedure should be performed following service of any airbag system component (Refer to RESTRAINTS STANDARD PROCEDURE - VERIFICATION TEST).