POST-COLLISION DIAGNOSIS

Perform the inspection and service on post-collision vehicles according to the procedures below regardless of the deployment or activation statuses of air bags and pre-tensioner.

SRS-ECU MEMORY CHECK

1.Connect M.U.T.-III to the diagnosis connector (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points

).
2.Use M.U.T.-III to read all the diagnosis codes.

note

If the battery power is not supplied because of the collision impact, M.U.T.-III and SRS-ECU cannot communicate with each other. When this occurs, check or repair the floor harness.

3.Use the M.U.T.-III to read the data list (how long trouble(s) have continued and how often memory have been erased).

DATA LIST

No	Service Data Item	Applicability
01	Failure continuation time 1	Maximum time to be stored: 9,999 minutes (approximately 7 days)
02	Failure continuation time 2
03	Elimination times	Maximum time to be stored: 250 times

4.Erase the stored memory of diagnosis code, and then wait for 45 seconds or more to read the diagnosis code again. However, when the air bag has been deployed or if SRS-ECU is judged to be failure, do not erase the stored memory of diagnosis code.

REPAIR PROCEDURE

<DRIVER’S AND FRONT PASSENGER’S AIR BAGS ARE DEPLOYED>

1.Replace the following parts with new ones.

SRS-ECU (Refer to ).
Driver’s air bag module (Refer to ).
Passenger’s (front) air bag module (Refer to ).
Seat belt with pre-tensioner (Refer to ).
Front impact sensor (Refer to ).
Instrument panel assembly (Refer to GROUP 52A - Instrument Panel Assembly ).

2.Check the following parts. If there is an abnormality, replace with new parts.

Clock spring (Refer to ).
Steering wheel, steering column assembly

(1) Check that the driver’s air bag module is installed to the steering wheel correctly.
(2) Check the steering wheel for noise, binding, operational failure, and play.
(3) Check the shock absorbing mechanism of steering column shaft assembly (Refer to GROUP 37 - On-vehicle Service

3.Check the wiring harness for binding, the connector for damage, and the terminal for deformation (Refer to

<SIDE AND CURTAIN AIR BAGS ARE DEPLOYED>

1.Replace the following parts with new ones.

SRS-ECU (Refer to ).
Front seatback frame and front seatback cover (Refer to GROUP 52A, Front seat assembly ).
Curtain air bag module (Refer to ).
Side impact sensor (Refer to ).
Headlining (Refer to GROUP 52A, Headlining ).
Front pillar trim, centre pillar trim upper, quarter trim upper (Refer to GROUP 52A - Interior Trim ).

2.Check the wiring harness for binding, the connector for damage, and the terminal for deformation (Refer to

<AIR BAG NOT DEPLOYED BECAUSE OF LOW-SPEED COLLISION>

1.Check the SRS air bag components and seat belt pre-tensioner according to the following procedures.

2.If a crack, deformation, or others are visually detected to the SRS air bag components or pre-tensioner, replace them with new parts.

3.Check the operation of seat belt. If the seat belt cannot be drawn out, replace the seat belt with a new one.

4.For removal and installation of parts, refer to "Servicing the SRS air bag/seat belt with pre-tensioner"

SRS-ECU

1.Check the SRS-ECU case for dent, crack or deformation.
2.Check the connector and wiring harness for damage and the terminal for deformation.
3.Check that SRS-ECU is installed correctly.

DRIVER’S AND PASSENGER’S (FRONT) AIR BAG MODULE

1.Check the pad cover for dent, crack or deformation.
2.Check the connector for damage, the terminal for deformation and the harness for binding.
3.Check the inflator case for dent, crack or deformation.
4.Check that the air bag module is installed correctly.

CLOCK SPRING

1.Check the connector and protector tube for damage and the terminal for deformation.
2.Check the case for damage.

STEERING WHEEL, STEERING COLUMN ASSEMBLY

1.Check that the driver’s air bag module is installed to the steering wheel correctly.

2.Check the steering wheel for noise, binding, operational failure and play.

SEAT BELT PRE-TENSIONER

1.Check the seat belt pre-tensioner for dent, crack or deformation.
2.Check the connector for damage and the terminal for deformation.

note

The illustration shows the pre-tensioner (RH). The position of the seat belt pre-tensioner (LH) is symmetrical to this.

FRONT IMPACT SENSOR

1.Check the front impact sensor for dent, crack or deformation.
2.Check the connector for damage, the terminal for deformation and the harness for binding.

note

The illustration shows the front impact sensor (LH). The position of the front impact sensor (RH) is symmetrical to this.

SIDE IMPACT SENSOR

1.Check the centre pillar and quarter trim lower for deformation.
2.Check the side impact sensor for dent, crack, deformation or rust.
3.Check the connector for damage, the terminal for deformation and the harness for binding.

note

The illustration shows the side impact sensor (LH). The position of the side impact sensor (RH) is symmetrical to this.

FRONT SEAT ASSEMBLY (WITH BUILT-IN SIDE AIR BAG MODULE)

1.Check that the side-airbag module deployment part of the seat is normal.
2.Check the connector for damage, the terminal for deformation, and the harness for binding.

CURTAIN AIR BAG MODULE

1.Check that the curtain air bag deployment part of the headlining is normal.
2.Check the inflator surface for cracks, dents or deformations.
3.Check the connector for damage, the terminal for deformation and the harness for binding.

note

The illustration shows the curtain air bag module (RH). The position of the curtain air bag module (LH) is symmetrical to this.

PASSENGER’S AIR BAG CUT OFF SWITCH

1.Check the passenger’s air bag cut off switch for dents or deformation.

2.Check the installation of the passenger’s air bag cut off switch.

<THE HIGH VOLTAGE SHUTDOWN SYSTEM OPERATES.>

1.Replace the following parts with new ones.

SRS-ECU (Refer to )
Side impact sensor (Refer to )
Rear detect sensor (Refer to )

2.Check the mounting bolts for the above component. If there is an abnormality, replace them with new ones.

3.Check the connector for damage, the terminal for deformation and the harness for binding.

HARNESS CONNECTOR (FRONT HARNESS, FLOOR HARNESS)

Check the wiring harness for binding, the connector for damage and the terminal for deformation (Refer to

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