Mitsubishi L200. Manual - part 587

 

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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.

 

 

 

 

 

 

 

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