Mitsubishi Lancer Evolution IX. Manual — part 636

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-57

STEP 3. Check the connectors between SRS-ECU
connector C-12 and ignition switch connector
C-208.

Q: Is the check result normal?

YES :

Check the harness wires for open or short

circuit between SRS-ECU connector C-12
(terminal No.13) and ignition switch
connector C-208, and repair if necessary.

NO :

Repair the defective connector.

AC101950AJ

SRS-ECU

Harness side
connector
(rear view)

C-12 (Y)

Connector: C-12

AC303806

Connector: C-208
<LHD>

Harness side
connector
(front view)

AI

Clock spring

AC303820 AE

Connector: C-208
<RHD>

Harness side
connector
(front view)

Clock spring

AC303823

Junction block (front view)

Connectors: C-211, C-214

C-214

C-211

AV

<RHD>

C-211

Harness side
(front view)

C-214

AC303809

Junction block (front view)

Connectors: C-211, C-214

C-211

Harness side
(front view)

C-214

C-211

AY

<LHD>

C-214

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-58

STEP 4. Check a burned-out fuse.
(1) Replace the fuse.
(2) Turn the ignition switch to the "ON" position, wait

for at least one minute and then turn the ignition
switch to the "LOCK" (OFF) position.

(3) Check the fuse.

Q: Is the fuse in good condition?

YES :

Go to Step 7.

NO :

Go to Step 5.

STEP 5. Resistance measurement at the junction
block connector C-214

(1) Disconnect junction block connector C-214, and

measure at the wiring harness side.

CAUTION

Do not insert a test probe into the terminal from
its front side directly as the connector contact
pressure may be weakened.
(2) Resistance measurement between terminal 7

and body earth.

OK: Open circuit

Q: Is the check result normal?

YES :

Check the other circuit, which flows through

fuse number 3.

NO :

Go to Step 6.

STEP 6. Resistance measurement at the
SRS-ECU connector C-12

(1) Disconnect SRS-ECU connector C-12, and

measure at the wiring harness side.

CAUTION

Do not insert a test probe into the terminal from
its front side directly as the connector contact
pressure may be weakened.
(2) Resistance measurement between terminal 13

and body earth.

OK: Open circuit

Q: Is the check result normal?

YES :

Go to Step 7.

NO :

Check the harness wire for short circuit
between SRS-ECU connector C-12
(terminal No.13) and junction block
connector C-214 (terminal No.7), and repair
if necessary.

AC303808

Junction block (front view)

Connector: C-214

AN

<LHD>

Harness side (front view)

AC303822

Junction block (front view)

Connector: C-214

AO

<RHD>

Harness side (front view)

AC100339

1 2 3 4 5 6 7 8 9 1011121314

1516171819202122232425262728

C-214 Harness side connector (rear view)

AI

AC101950AJ

SRS-ECU

Harness side
connector
(rear view)

C-12 (Y)

Connector: C-12

AC202026

13 14 15 16 17 18 19 20

5 6 7 8 9 10 11 12

1 2

3 4

C-12 Harness connector (rear view)

AL

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-59

STEP 7. Check whether the diagnosis code is
reset.

Q: Is diagnosis code 42 set?

YES :

Replace the SRS-ECU (Refer to

P.52B-109

).

NO :

An intermittent malfunction is suspected
(Refer to GROUP 00

− How to Use

Troubleshooting/Inspection Service Points

P.00-5

).

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-60

Code No.43: SRS warning lamp circuit open-circuited (Lamp does not Illuminate).

IGNITION
SWITCH (IG1)

MICROCOMPUTER

COMBINATION
METER

WARNING LAMP
DRIVE CIRCUIT

SRS-ECU

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet

SRS Warning Lamp Drive Circuit

CONNECTOR
LOCK SWITCH

NOTE

: CONNECTOR
COUPLED: ON
CONNECTOR
UNCOUPLED: OFF

: LH drive vehicles
: RH drive vehicles