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Home >> Mercury >> 2008 >> Grand Marquis V8-4.6L Flex Fuel >> Repair and Diagnosis >> Relays and Modules >> Relays and Modules - Restraints and Safety Systems >> Air Bag Control Module >> Service and Repair

Air Bag Control Module: Service and Repair

RESTRAINTS CONTROL MODULE (RCM)







Removal

WARNING:
- If a vehicle has been in a crash, inspect the restraints control module (RCM) and the impact sensor (if equipped) mounting areas for deformation. If damaged, restore the mounting areas to the original production configuration. A new RCM and sensors must be installed whether or not the air bags have deployed. Failure to follow these instructions may result in serious personal injury or death in a crash.
- To reduce the risk of accidental deployment, do not use any memory saver devices. Failure to follow this instruction may result in serious personal injury or death.
- Always tighten the fasteners of the restraints control module (RCM) and impact sensor (if equipped) to the specified torque. Failure to do so may result in incorrect restraint system operation, which increases the risk of personal injury or death in a crash.

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

NOTE:
- The air bag warning indicator illuminates when the restraints control module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraints system (SRS) fault.
- When installing a new RCM, always make sure the correct RCM is being installed. If an incorrect RCM is installed, erroneous DTCs will result.
- The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
- Repair is made by installing a new part only. If the new part does not correct the condition, install the original part and carry out the diagnostic procedure again.

Vehicles with floor shifter
1. Apply the parking brake and place the transmission in position 1.

All vehicles
2. Depower the SRS.
3. Remove the pin-type retainer and the carpet patch.







Vehicles with column shifter
4. Remove the ashtray.
1 Release the tabs.
2 Remove the ashtray.







5. Position the ashtray bracket aside.
1 Remove the 2 screws (not shown).
- The screws can be accessed from under the instrument panel center stack.

2 Slide the ashtray bracket forward, releasing the retainers and position the ashtray bracket out of the way to access the RCM.







Vehicles with floor shifter
6. Release the retaining clips and detach the storage compartment.







7. Disconnect the power point electrical connector and remove the storage compartment.







8. Detach the retaining clips and remove the floor console finish panel.







All vehicles
9. Remove the 2 RCM bolts on the RH side.
10. Disconnect the large RCM electrical connector.
1 Pinch the thumb tab and pivot the connector position assurance lever all the way back until it stops.
2 Pull out and disconnect the RCM electrical connector.







11. Disconnect the small RCM electrical connector.
12. Remove the RCM bolt on the LH side and the RCM.

Installation

All vehicles

1. WARNING: Always tighten the fasteners of the restraints control module (RCM) and impact sensor (if equipped) to the specified torque. Failure to do so may result in incorrect restraint system operation, which increases the risk of personal injury or death in a crash.

Position the RCM and install the 2 RCM bolts on the RH side.
- Tighten to 12 Nm (9 lb-ft).

2. Connect the small RCM electrical connector.
3. Install the RCM bolt on the LH side.
- Tighten to 12 Nm (9 lb-ft).

4. Make sure the connector position assurance lever is all the way back and in the full release position before attempting to connect the connector.







5. CAUTION: Placing the large restraints control module (RCM) electrical wiring connector into the RCM on an angle may cause bad electrical connections and damaged components.

NOTE: The RCM has been removed for clarity. Position the large RCM electrical connector into the RCM.

- CAUTION: Do not push the connector to the point where the lever pivots and seats itself. Light pressure is needed to get the connector into position on the restraints control module (RCM), before using the lever to fully seat the connector. Damage to the connector or component may occur.

With the large RCM electrical connector uniformly aligned to the RCM, lightly push in until a subtle audible click is heard and slight resistance is felt.







6. NOTE: The RCM has been removed for clarity.

Connect the large RCM electrical connector.
- Using the connector position assurance lever, pivot it toward the RCM, drawing the connector into the RCM.
- Make sure the thumb tab is engaged to the retainer on the RCM and is locked in place.







Vehicles with column shifter
7. Position the ashtray bracket, slide the retaining clips into place and install the 2 screws.
8. Install the ashtray.

Vehicles with floor shifter
9. Connect the storage compartment power point electrical connector.
10. Align the retaining clips and install the storage compartment.
11. Align the retaining clips and install the floor console finish panel.
12. Place the transmission in PARK and release the parking brake.

All vehicles
13. Position the carpet patch and install the pin-type retainer.
14. Repower the SRS.
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