Mitsubishi L200. Manual — part 587

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-19

B1599

*2

Front impact sensor (LH) system

Short circuit in the sensor

P.52B-64

<vehicles

without side-airbag
and curtain air bag>,

P.52B-223

<vehicles

with side-airbag and
curtain air bag>

B1600

*2

Open circuit in the sensor

P.52B-64

<vehicles

without side-airbag
and curtain air bag>,

P.52B-223

<vehicles

with side-airbag and
curtain air bag>

B1601

*2

Short circuit in the earth

P.52B-64

<vehicles

without side-airbag
and curtain air bag>,

P.52B-223

<vehicles

with side-airbag and
curtain air bag>

B1602

*2

Short circuit in the power
supply

P.52B-64

<vehicles

without side-airbag
and curtain air bag>,

P.52B-223

<vehicles

with side-airbag and
curtain air bag>

B1603

*2

Seat belt pre-tensioner (driver's side) (squib) system (short-circuited
between terminals of the squib circuit)

P.52B-67

<vehicles

without side-airbag
and curtain air bag>,

P.52B-226

<vehicles

with side-airbag and
curtain air bag>

B1604

*2

Seat belt pre-tensioner (driver's side) (squib) system (open-circuited
in the squib circuit)

P.52B-71

<vehicles

without side-airbag
and curtain air bag>,

P.52B-230

<vehicles

with side-airbag and
curtain air bag>

B1605

*2

Seat belt pre-tensioner (driver's side) (squib) system (short-circuited
to the earth)

P.52B-74

<vehicles

without side-airbag
and curtain air bag>,

P.52B-233

<vehicles

with side-airbag and
curtain air bag>

B1606

*2

Seat belt pre-tensioner (driver's side) (squib) system (short-circuited
to the power supply)

P.52B-77

<vehicles

without side-airbag
and curtain air bag>,

P.52B-236

<vehicles

with side-airbag and
curtain air bag>

Code No.

Diagnosis item

Reference Page

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-20

B1607

*3

Seat belt pre-tensioner (driver's side) (squib ignition drive circuit)
system detected short circuit

P.52B-34

<vehicles

without side-airbag
and curtain air bag>,

P.52B-106

<vehicles

with side-airbag and
curtain air bag>

B1608

*3

Seat belt pre-tensioner (driver's side) (squib ignition drive circuit)
system detected open circuit

P.52B-34

<vehicles

without side-airbag
and curtain air bag>,

P.52B-106

<vehicles

with side-airbag and
curtain air bag>

B1609

*2

Seat belt pre-tensioner (passenger's side) (squib) system (short-
circuit between terminals of the squib circuit)

P.52B-80

<vehicles

without side-airbag
and curtain air bag>,

P.52B-239

<vehicles

with side-airbag and
curtain air bag>

B1610

*2

Seat belt pre-tensioner (passenger's side) (squib) system (open-
circuited in the squib circuit)

P.52B-84

<vehicles

without side-airbag
and curtain air bag>,

P.52B-243

<vehicles

with side-airbag and
curtain air bag>

B1611

*2

Seat belt pre-tensioner (passenger's side) (squib) system (short-
circuited to the earth)

P.52B-87

<vehicles

without side-airbag
and curtain air bag>,

P.52B-246

<vehicles

with side-airbag and
curtain air bag>

B1612

*2

Seat belt pre-tensioner (passenger's side) (squib) system (short-
circuited to the power supply)

P.52B-90

<vehicles

without side-airbag
and curtain air bag>,

P.52B-249

<vehicles

with side-airbag and
curtain air bag>

B1613

*3

Seat belt pre-tensioner (passenger's side) (squib ignition drive
circuit) system detected short circuit

P.52B-34

<vehicles

without side-airbag
and curtain air bag>,

P.52B-106

<vehicles

with side-airbag and
curtain air bag>

B1614

*3

Seat belt pre-tensioner (passenger's side) (squib ignition drive
circuit) system detected open circuit

P.52B-34

<vehicles

without side-airbag
and curtain air bag>,

P.52B-106

<vehicles

with side-airbag and
curtain air bag>

Code No.

Diagnosis item

Reference Page

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-21

NOTE:

.

•

*1

: This diagnosis code will remain in memory and the SRS warning lamp will be switched off when the

system returns to normal condition.

•

*2

: This diagnosis code will remain in memory and the SRS warning lamp will be switched on even if the

system returns to normal condition.

•

*3

: This diagnosis code cannot be erased by "Erase diagnosis codes" function.

DIAGNOSIS CODE PROCEDURES
<VEHICLES WITHOUT SIDE-AIRBAG
AND CURTAIN AIR BAG>

Code No.B1400: Driver's air bag module (squib) system (short-circuited between terminals of the
squib circuit)

AC806117

Driver's Air Bag Module (Squib) Circuit

AIR BAG MODULE
(SQUIB)
(DRIVER'S SIDE)

CONNECTOR
LOCK SWITCH

CONNECTOR
LOCK SWITCH

CLOCK SPRING

SRS-ECU

CONNECTOR
LOCK SWITCH

NOTE

: CONNECTOR COUPLED: ON
CONNECTOR UNCOUPLED: OFF

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

AB

OPERATION

• The SRS-ECU judges how severe a collision is

by detecting signals from the front impact sensors
and the front air bag analogue G-sensor. If the
impact is over a predetermined level, the SRS-

ECU sends an ignition signal. At this time, if the
front air bag safing G-sensor is on, the SRS air
bag will inflate.

• The ignition signal is input to the air bag module

via the clock spring to inflate the air bag.

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-22

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if one driver's air bag
squib wire shorted to the other.

PROBABLE CAUSES

• Improper engaged connector or defective short

spring*

• Short circuit in the clock spring

• Short circuit between the driver's air bag module

(squib) circuit terminals

• Damaged connector(s)

• Malfunction of the SRS-ECU

NOTE: *: The squib circuit connectors integrate a
"short" spring (which prevents the air bag from
deploying unintentionally due to static electricity by
shorting the positive wire to the earth wire in the
squib circuit when the connectors are disconnected).
Therefore, if connector C-131, C-303 or C-305 is
damaged or improperly engaged, the short spring
may not be released when the connector is con-
nected.

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code.

Q: Is diagnosis code B1519 set?

YES :

Go to Step 2.

NO :

Go to Step 3.

STEP 2. Connector lock check: SRS-ECU
connector C-131. (M.U.T.-III diagnosis code)
(1) Disconnect the negative battery terminal.

AC501670

AB

C-131 (Y)

Connector: C-131

Harness side
connector
(rear view)

(2) Disconnect connectors C-131 and then

reconnect it.

(3) Connect the negative battery terminal.
(4) Erase the diagnosis code memory, and check the

diagnosis code.

Q: Is diagnosis code B1400 set?

YES :

Go to Step 3.

NO :

The procedure is complete. It is assumed
that diagnosis code B1400 set as connector
C-131 was engaged improperly.

STEP 3. Connector lock check: SRS-ECU
connector C-131, clock spring connector C-305
and driver’s air bag module connector C-303.
(M.U.T.-III diagnosis code)
(1) Disconnect the negative battery terminal.

AC501670

AB

C-131 (Y)

Connector: C-131

Harness side
connector
(rear view)

AC903858AE

Connectors: C-303, C-305 <LHD>

C-305 (Y)

Harness side
connector
(front view)

C-303

C-303

C-305

AC903869AE

Connectors: C-303, C-305 <RHD>

C-305 (Y)

Harness side
connector
(front view)

C-303

C-303

C-305

(2) Disconnect connectors C-131, C-305 and C-303,

and then reconnect them.

(3) Connect the negative battery terminal.
(4) Erase the diagnosis code memory, and check the

diagnosis code.

Q: Is diagnosis code B1400 set?

YES :

Go to Step 4.

NO :

The procedure is complete. It is assumed
that diagnosis code B1400 set as connector
C-131, C-305 or C-303 was engaged
improperly.