Removal and Installation
REMOVAL AND INSTALLATION
WARNING:
- Never attempt to disassemble or repair the air bag modules or clock spring. If faulty, replace it.
- Do not drop the air bag modules or clock spring or allow contact with water, grease or oil. Replace it if a dent, crack, deformation or rust is detected.
- The air bag modules should be stored on a flat surface with the pad cover facing upward. Do not place anything on top of it.
- Do not expose the air bag modules to temperatures over 93°C (200°F).
- After deployment of an air bag, replace the clock spring with a new one.
- Wear gloves and safety glasses when handling air bags that have already deployed.
- An undeployed air bag module should only be disposed of in accordance with the procedures (Refer to Procedures ).
- When removing and installing the front passenger seat, be sure to carry out accuracy check occupant classification sensor after the seat has been installed in the vehicle. (On-vehicle Service Accuracy Check of Occupant Classification Sensor .)
[SIDE-AIRBAG MODULE]
For removal and installation of the front seatback assembly with side-airbag module, refer to Front Seat Front Seat Assembly Disassembly and Assembly.
[DRIVER'S AIR BAG MODULE AND CLOCK SPRING]
Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A
- MB992006: Extra Fine Probe
- MB990803: Steering Wheel Puller
[PASSENGER'S (FRONT) AIR BAG MODULE]
Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A
REMOVAL SERVICE POINTS
[[A]] NEGATIVE (-) BATTERY CABLE DISCONNECTION
DANGER:
Wait at least 60 seconds after disconnecting the battery cable before doing any further work. (Refer to Service Precautions).
WARNING:
Battery posts, terminals and related accessories contain lead and lead compounds. WASH HANDS AFTER HANDLING.
Disconnect the negative (-) battery cable from the battery and tape the terminal to prevent accidental connection and air bag(s) deployment.
[[B]] CONNECTOR (FOR AIR BAG MODULE) REMOVAL
Slide the outer housing of the air bag module connector in the arrow direction shown, and disconnect the connector.
[[C]] DRIVER'S AIR BAG MODULE REMOVAL
WARNING:
- The driver's air bag module must not be measured with an ohmmeter.
- The driver's air bag module must not be disassembled.
- The removed driver's air bag module should be stored in a clean, dry place with the deployment surface facing up.
Loosen the torx screw and remove the air bag module assembly.
[[D]]STEERING WHEEL ASSEMBLY REMOVAL
CAUTION:
Use the special tool to remove the steering wheel since the steering column collision absorbing mechanism may be damaged.
Use special tool MB990803 to remove the steering wheel.
[[E]] CLOCK SPRING REMOVAL
WARNING:
The removed clock spring should be stored in a clean, dry place.
[[F]] PASSENGER'S (FRONT) AIR BAG MODULE REMOVAL
WARNING:
- When the passenger's (front) air bag module is removed, do not damage the engagement of the pawls.
- The removed passenger's (front) air bag module should be stored in a clean, dry place with the deployment surface facing up.
INSTALLATION SERVICE POINTS
]]A[[ PRE-INSTALLATION INSPECTION
1. WARNING:
Dispose of air bag modules only according to the specified procedure. (Refer to Procedures).
When installing the new air bag modules and clock spring, refer to "INSPECTION" ( Removal and Replacement).
2. Connect the negative (-) battery cable.
3.
CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
Connect scan tool MB991958 to the data link connector.
4. Turn the ignition switch to the "ON" position.
5. Check DTCs using scan tool MB991958 to ensure entire SRS operates properly.
At this time, check that no DTC except B1400, B1410, B1480 and B1490 are set.
6. DANGER:
Wait at least 60 seconds after disconnecting the battery cable before doing any further work. (Refer to Service Precautions).
WARNING:
Battery posts, terminals and related accessories contain lead and lead compounds. WASH HANDS AFTER HANDLING.
Turn the ignition switch to the "LOCK" (OFF) position. Disconnect the negative (-) battery cable and tape the terminal to prevent accidental connection and air bags deployment.
]]B[[ CLOCK SPRING INSTALLATION
1. WARNING:
Ensure that the clock spring's mating marks are properly aligned. If not, the steering wheel may not rotate completely during a turn, or the flat cable in the clock spring could be damaged, This would prevent normal SRS operation and possibly cause serious injury to the driver.
Turn the clock spring clockwise fully.
2. Turn the clock spring anti-clockwise approximately three and 1/2 turns to align the mating marks.
3. Check that the white or yellow roller can be seen from the window for checking the neutral point when the mating marks are aligned.
NOTE:
If the white or yellow roller cannot be seen or black roller can be seen, the neutral point is not aligned correctly.
4. Install the clock spring to the column switch.
]]C[[ STEERING WHEEL ASSEMBLY/AIR BAG MODULE ASSEMBLY INSTALLATION
1.
CAUTION:
When installing the steering wheel and air bag module, ensure that the harness of the clock spring does not become caught or tangled.
Before installing the steering wheel and air bag module, turn the vehicle's front wheels to the straight-ahead position and align the mating marks of the clock spring.
2. After securing the steering wheel, turn the steering wheel all the way in both directions to confirm that the steering wheel rotation is normal.
]]D[[ POST-INSTALLATION INSPECTION
1. Connect the negative (-) battery cable.
2. Turn the ignition switch to the "ON" position.
3. Does the SRS warning light illuminate for approximately seven seconds, and go out?
4. If yes, the SRS system is functioning properly. If not, refer to SRS Warning Light Check.