Mitsubishi L200. Manual — part 636

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-215

(4) Erase diagnosis code memory, and then check

the diagnosis code.

Q: Is diagnosis code B1519 set?

YES :

Go to Step 2.

NO :

The procedure is complete. It is assumed
that diagnosis code B1519 set as
connectors C-153, C-154 and C-155 were
engaged improperly.

STEP 2. Connector lock check: SRS-ECU
connectors C-153, C-154 and C-155.

AC801404

AI

Connectors: C-153, C-154, C-155

C-153 (Y)

C-154 (Y)

C-155 (Y)

AC801600AB

SRS-ECU Harness side connector (front view)

Connector
lockswitch
terminal

Connector
lockswitch
terminal

Connector
lockswitch
terminal

(1) Disconnect SRS-ECU connectors C-153, C-154

and C-155.

(2) Check the connector lock switch terminal inside

the harness side connector for improper contact
or deformation.

Q: Are the SRS-ECU connectors C-153, C-154 and C-

155 in good condition?
YES :

Go to Step 3.

NO :

Replace the SRS-ECU connector C-153, C-
154 and C-155.

STEP 3. Check whether the diagnosis code is
reset.

Q: Is diagnosis code B1519 set?

YES :

Replace the SRS-ECU (Refer to

P.52B-

266

).

NO :

An intermittent malfunction is suspected
(Refer to GROUP 00, How to Cope with
Intermittent Malfunction ).

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-216

Code No. B1551: SRS warning lamp circuit malfunction (Lamp does not Illuminate).

AC801181

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

SRS Warning Lamp Drive Circuit

IGNITION
SWITCH (IG1)

COMBINATION
METER

SRS-ECU

AD

OPERATION

• Power for the SRS warning lamp is supplied from

the ignition switch (IG1) circuit.

• The SRS warning lamp illuminates when the igni-

tion switch is turned to the "ON" position and
goes out after approximately 7 seconds if there is
not a malfunction in the SRS system.

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code will be set if the SRS warning
lamp driving circuit is short to earth.

PROBABLE CAUSES

• Damaged wiring harnesses of connectors

• Malfunction of the SRS-ECU

• Malfunction of the combination meter

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-217

DIAGNOSIS PROCEDURE

STEP 1. Check the combination meter connector
C-112.

AC903856AR

Connector: C-112 <LHD>

Harness side
connector
(rear view)

AC903868

BD

Connector: C-112 <RHD>

Harness side
connector
(rear view)

Q: Is the connector correctly engaged?

YES :

Go to Step 2.

NO :

Engage the connector correctly. Then go to
Step 7.

STEP 2. Voltage measurement at combination
meter connector C-112.

AC903856AR

Connector: C-112 <LHD>

Harness side
connector
(rear view)

AC903868

BD

Connector: C-112 <RHD>

Harness side
connector
(rear view)

(1) Disconnect the combination meter connector C-

112.

(2) Connect the negative battery terminal.
(3) Turn the ignition switch to the "ON" position.
(4) Measure the voltage between C-112 harness

side connector terminal 36 and body earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Go to Step 3.

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-218

STEP 3. Check the harness for open circuit
between ignition switch and combination meter
connector C-112 (terminal No.36).

AC903856AR

Connector: C-112 <LHD>

Harness side
connector
(rear view)

AC903868

BD

Connector: C-112 <RHD>

Harness side
connector
(rear view)

NOTE:

AC903853

Connector: C-132 <LHD>

AC

C-132 (GR)

AC903865

Connector: C-132 <RHD>

AB

C-132 (GR)

AC509934 AS

Connectors: C-207, C-209 <LHD>

Harness side

C-209

C-207

Harness side

C-209

C-207

Junction block (Front view)

AC509936 AN

Connectors: C-207, C-209 <RHD>

Harness side

C-209

C-207

Harness side

C-209

C-207

Junction block (Front view)

Prior to the wiring harness inspection, check junction
block connector C-132, C-207 and C-209, and repair
if necessary.

Q: Is the check result normal?

YES :

An intermittent malfunction is suspected

(Refer to GROUP 00, How to Cope with
Intermittent Malfunction ).

NO :

Repair the harness wires between ignition
switch and the combination meter connector
C-112 (terminal No.36). Then go to Step 7.