Mitsubishi L200. Manual — part 602

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-79

disconnect the connector.

AC300977

Section
A - A

C-130 Harness side connector
(front view)

Cable tie

Short spring

4 mm or more

Terminal

A

A

AE

CAUTION

Insert an insulator such as a cable tie to a depth
of 4mm or more, otherwise the short spring will
not be released.
(4) Insert a cable tie [3 mm wide, 0.5 mm thick]

between terminals 29, 30 and the short spring to
release the short spring.

(5) Connect the negative battery terminal.

(6) Turn the ignition switch to the "ON" position.

AC501405

C-130 Harness side
connector (rear view)

AC501405 AB

CAUTION

Do not insert a test probe into the terminal from
its front side directly as the connector contact
pressure may be weakened.
(7) Voltage measurement between C-130 harness

side connector terminals 29, 30 and body earth.

OK: 1 V or less

Q: Is the measured voltage within the specified

range?
YES :

Go to Step 3 .

NO :

Repair the harness wire between SRS-ECU
connector C-130 (terminal No.29 and 30)
and the seat belt pre-tensioner (driver's
side) connector D-15 <LHD> or D-23
<RHD> (terminal No.1 and 2)

STEP 3. Check whether the diagnosis code is
reset.

Q: Is diagnosis code B1606 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-80

Code No.B1609: Seat belt pre-tensioner (passenger's side) (squib) system (short-circuit between
terminals of the squib circuit)

AC805785

SRS-ECU

CONNECTOR
LOCK SWITCH

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

AE

SEAT BELT
PRE-TENSIONER

CONNECTOR
LOCK SWITCH

<RHD>
<LHD>

Seat Belt Pre-tensioner (Passenger's Side) (Squib)

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 seat belt pre-tensioner will
deploy.

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if one seat belt pre-ten-
sioner (passenger's side) squib wire shorted to the
other.

PROBABLE CAUSES

• Improper engaged connector or defective short

spring*

• Short circuit between the seat belt pre-tensioner

(passenger's side) (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-123, C-130 or D-23 <LHD>
or D-15 <RHD> is damaged or improperly engaged,
the short spring may not be released when the con-
nector is connected.

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.

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-81

STEP 2. Connector lock check: SRS-ECU
connector C-130. (M.U.T.-III diagnosis code)
(1) Disconnect the negative battery terminal.

AC501670

AC

C-130 (Y)

Connector: C-130

Harness side
connector
(rear view)

(2) Disconnect the connectors C-130 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 B1609 set?

YES :

Go to Step 3.

NO :

The procedure is complete. It is assumed
that diagnosis code B1609 set as connector
C-130 was engaged improperly.

STEP 3. Connector lock check: Intermediate
connector C-123, SRS-ECU connector C-130 and
seat belt pre-tensioner (passenger's side)
connector D-23 <LHD> or D-15 <RHD>. (M.U.T.-III
diagnosis code)
(1) Disconnect the negative battery terminal.

AC501670

AC

C-130 (Y)

Connector: C-130

Harness side
connector
(rear view)

(2) Disconnect the connectors C-130 and then

reconnect them.

AC501889

AC511604

AD

Harness side
connector
(front view)

Connectors: D-23 <LHD>, D-15 <RHD>

D-15 (B)

Centre

pillar

D-23 (B)

AC300147AV

Seat belt
pre-tensioner
connector

Flat-tipped
screwdriver

Locking button

Harness side connector

(3) Disconnect connector D-23 <LHD> or D-15

<RHD> and then reconnect them. Use a flat-
tipped screwdriver to pull out the locking button at

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-82

the harness side connector.

AC903853

Connector: C-123 <LHD>

BJ

C-123 (Y)

Intermediate
connector

AC903868

CD

Connector: C-123 <RHD>

C-123 (Y)

Intermediate
connector

AC600868

Outer housing of the intermediate connector
(Instrument panel wiring harness side)

AH

(4) Disconnect connectors C-123, and then

reconnect it. Slide the outer hosing of
intermediate connector (instrument panel wiring
harness side) C-123 in the arrow direction
shown.

(5) Connect the negative battery terminal.
(6) Erase the diagnosis code memory, and check the

diagnosis code.

Q: Is diagnosis code B1609 set?

YES :

Go to Step 4.

NO :

The procedure is complete. It is assumed
that diagnosis code B1609 set as connector
C-123, C-130 or D-23 <LHD> or D-15
<RHD> was engaged improperly.

STEP 4. Check the diagnosis code by connecting
a dummy resistor. (M.U.T.-III diagnosis code)
(1) Disconnect the negative battery terminal.

AC501889

AC511604

AD

Harness side
connector
(front view)

Connectors: D-23 <LHD>, D-15 <RHD>

D-15 (B)

Centre

pillar

D-23 (B)

AC300147AV

Seat belt
pre-tensioner
connector

Flat-tipped
screwdriver

Locking button

Harness side connector

(2) Disconnect seat belt pre-tensioner (passenger's

side) connector D-23 <LHD> or D-15 <RHD>.
Use a flat-tipped screwdriver to pull out the
locking button at the harness side connector, and
then disconnect the connector.

AC501975

MB991865

(Dummy

resistor : 3 )

MB991884
(Resistor
harness)

AF

Harness
side connector

(3) Connect special tool dummy resistor (MB991865)

to special tool resistor harness (MB991884).

(4) Connect special tool (MB991884) to the D-23

<LHD> or D-15 <RHD> harness side connector.

(5) Connect the negative battery terminal.
(6) Erase diagnosis code memory, and then check

the diagnosis code.

Q: Is diagnosis code B1609 set?

YES :

Go to Step 5.

NO :

Replace the seat belt with pre-tensioner
(passenger's side) (Refer to

P.52B-284

).