1999 MITSUBISHI LANCER EVOLUTION VI wheel

SRS – Post-collision Diagnosis52B-21
SRS-ECU
1. Check SRS-ECU case and brackets for dents, cracks
or deformation.
2. Check connector for damage, and terminals for
deformation.
Air bag modules
1. Check pad cover for dents, cracks or deformation.
2. Check connector for damage, terminals deformities, and
harness for binds.
3. Check air bag inflator case for dents, cracks or deformities.
4. Install air bag module to steering wheel to check fit or
alignment with the wheel.
Clock spring
1. Check clock spring connectors and protective tube for
damage, and terminals for deformation.
2. Visually check the case for damage.
SRS-ECU

Connector

Inflator case
ConnectorInflator case
Case Protective tube
Protective tube

SRS – Post-collision Diagnosis / Individual Component Service52B-22
Steering wheel, steering column and intermediate joint
1. Check wiring harness (built into steering wheel) and
connectors for damage, and terminals for deformation.
2. Install air bag module to check fit or alignment with steering
wheel.
3. Check steering wheel for noise, binds or difficult operation
and excessive free play.
Harness connector (body wiring harness)
Check harnesses for binding, connectors for damage, poor
connection, and terminals for deformation. (Refer to P.52B-18.)
INDIVIDUAL COMPONENT SERVICE
If the SRS components are to be removed or replaced as a result of maintenance, troubleshooting,
etc., follow each procedure (P.52B-24 – P.52B-31)
Caution
1. SRS components should not be subjected to hear over 93C, so remove the SRS-ECU, air
bag module and clock spring before drying or baking the vehicle after painting.
Recheck SRS system operability after re-installing them.
2. If the SRS components are removed for the purpose of check, sheet metal repair, painting,
etc., they should be stored in a clean, dry place until they are reinstalled.

SRS – Warning/Caution Labels52B-23
WARNING/CAUTION LABELS
A number of caution labels related to the SRS are
found in the vehicle, as shown in the followingillustration. Follow label instructions when servicing
SRS. If labels are dirty or damaged, replace them.
Steering wheel Air bag module (driver’s side) Clock spring
Glove box Sun visor SRS-ECU
Steering gear and linkage Air bag module
(front passenger’s side)

SRS – Air Bag Modules and Clock Spring52B-26
REMOVAL AND INSTALLATION

Pre-removal Operation

After setting the steering wheel and the front wheels
to the straight ahead position, remove the ignition
key.

Battery negative (–) terminal disconnection
41 Nm2
3
4 1
AB8.9 Nm
NOTE
: Indicates claw position.
Upper
column
cover
Claw
Section B – B
4
AB
8.9 Nm
Section A – A
4
Upper
column
cover
Claw
Driver’s side air bag module
removal steps
A1. Driver’s side air bag module
Clock spring removal steps
A1. Driver’s side air bag module
B2. Steering wheel
3. Lower column cover
C4. Clock springDriver’s side air bag module
installation steps
A
Pre-installation inspection
1. Driver’s side air bag module

Negative (–) battery cable connection
D
Post-installation inspection
Clock spring installation steps
A
Pre-installation inspection
B4. Clock spring
3. Lower column cover
C2. Steering wheel
1. Driver’s side air bag module

Negative (–) battery cable connection
D
Post-installation inspection

SRS – Air Bag Modules and Clock Spring52B-28
BSTEERING WHEEL REMOVAL
CCLOCK SPRING REMOVAL
Caution
The removed clock spring should be stored in a clean,
dry place.
DAIR BAG MODULE REMOVAL
(FRONT PASSENGER’S SIDE)
Caution
The removed air bag module should be stored in a clean,
dry place with the pad cover face up.
INSTALLATION SERVICE POINTS
APRE-INSTALLATION INSPECTION
1. When installing the new air bag modules and clock spring,
refer to “INSPECTION”.
Caution
Dispose of air bag modules only according to the
specified procedure. (Refer to P.52B-32.)
2. Connect the battery (–) terminal.
3. Connect the MUT-II to the diagnosis connector.
Caution
Make certain that the ignition switch is LOCK (OFF)
when the MUT-II is connected or disconnected.
4. Turn the ignition key to the “ON” position.
5. Conduct self-diagnosis using the MUT-II to ensure entire
SRS operates properly, except open circuit of air bag
modules.
6. Turn the ignition key to the LOCK (OFF) position,
disconnect the negative battery cable and tape the
terminal.
Caution
Wait at least 60 seconds after disconnecting the
battery cable before doing any further work.
(Refer to P.52B-3.)
MB990803

SRS – Air Bag Modules and Clock Spring52B-29
BCLOCK SPRING INSTALLATION
Align the mating marks of the clock spring and, after turning
the front wheels to the straight-ahead position, install the
clock spring to the column switch.
Mating Mark Alignment
Turn the clock spring clockwise fully, and then turn back it
approx. 3 4/5 turns counterclockwise to align the mating marks.
Caution
If the clock spring’s mating marks are not properly aligned,
the steering wheel may not be completely rotational during
a turn, or the flat cable within the clock spring may be
severed, obstructing normal operation of the SRS and
possibly leading to serious injury to the vehicle’s driver.
CSTEERING WHEEL INSTALLATION
1. Before installation the steering wheel, be sure to first
turn the vehicle’s front wheels to the straight-ahead
position and align the mating marks of the clock spring.
Caution
Be sure when installing the steering wheel, that the
harness of the clock spring does not become caught
or tangled.
2. After clamping, turn the steering wheel all the way in
both directions to confirm that steering is normal.
DPOST-INSTALLATION INSPECTION
1. Turn the steering wheel lightly to the left and right to
check if it can be operated properly without any
abnormality.
2. Reconnect the negative battery terminal.
3. Turn the ignition key to the “ON” position.
4. Does the “SRS” warning lamp illuminate for about 7
seconds, and then remain extinguished for at least 5
seconds after turning OFF?
5. If yes, SRS system is functioning properly.
If no, consult page 52B-6.
Mating marks
SRS warning lamp

SRS – Air Bag Modules and Clock Spring52B-30
INSPECTION
AIR BAG MODULE CHECK
If any improper part is found during the following inspection,
replace the air bag modules with a new one.
Dispose the old one according to the specified procedure.
(Refer to P.52B-32.)
Caution
Never attempt to measure the circuit resistance of the
air bag modules (squib) even if you are using the specified
tester. If the circuit resistance is measured with a tester,
accidental air bags deployment will result in serious
personal injury.
1. Check pad cover for dents, cracks or deformation.
2. Check connectors for damage, terminals for deformation,
and harness for binds.
3. Check air bag inflator case for dents, cracks or
deformation.
4. Install the air bag module to steering wheel to check
fit or alignment with the wheel.
Caution
If dents, cracks, deformation, or rust are discovered in
the air bag module, replace it with a new one.
Dispose of the old one according to the specified
procedure. (Refer to P.52B-32.)
CLOCK SPRING CHECK
If, as result of following checks, even one abnormal point
is discovered, replace the clock spring with a new one.
1. Check connectors and protective tube for damage, and
terminals for deformation.
2. Visually check the case for damage.

Inflator case
Connector

Inflator case
Connector
Protective tube
Case
Protective tube

SRS – Air Bag Module Disposal Procedures52B-37
(2) Connect two wires, each six meters or longer, to the
two leads of SRS air bag adapter harness B side>, and cover the connections with insulation tape.
The other ends of the two wires should be connected
to each other (short-circuited), to prevent sudden
unexpected deployment of the air bag module.
(3) Take the SRS air bag adapter harness B that is
connected to the wires, pass it beneath the old tyre
wheel assembly, and connect it to the air bag module.
(4) Pass the thick wire through the air bag module
mounting hole, and then secure the air bag module
to an old tyre with a wheel in it so that the pad on
the module is facing upwards.
Caution
Leave some space below the wheel for the adaptor
harness. If there is no space, the reaction when
the air bag deploys could damage the adaptor
harness.
(5) Place three old tyres with no wheels on top of the
tyre secured to the air bag module.
Two wires
SRS air bag
adapter
harness B
MR203491 or
MB628919Connection
6 m
long or
more
Insulation tape
Air bag module
Deployment wire
harness
Tyres without wheels
Deployment wire harness