Mitsubishi L200. Manual — part 621

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-155

STEP 5. Resistance measurement at SRS-ECU
connector C-153.
(1) Disconnect the negative battery terminal.

AC801404

AL

Connector: C-153

C-153 (Y)

Harness side
connector
(rear view)

(2) Disconnect SRS-ECU connector C-153.

DANGER

To prevents the air bag from deploying unin-
tentionally, disconnect the side-airbag mod-
ule (LH) connector D-35 to short the squib
circuit.

AC903877

Connector: D-35 <LHD>

<CLUB CAB>

D-35 (Y)

Harness side
connector
(rear view)

AH

AC903879AF

Connector: D-35 <RHD>

<CLUB CAB>

D-35 (Y)

Harness side
connector
(rear view)

AC903885AO

Connector: D-35 <LHD>

<DOUBLE CAB>

D-35 (Y)

Harness side
connector
(rear view)

AC903886 AJ

Connector: D-35 <RHD>

<DOUBLE CAB>

D-35 (Y)

Harness side
connector
(rear view)

AC706606

AF

Locking button

(3) Disconnect side-airbag module (LH) connector

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-156

D-35. When disconnecting connector D-35,
unlock the connector by sliding the locking button
to the direction of the arrow as shown in the
figure, and then disconnect the connector.

AC801566

Section
A - A

C-153 Harness side connectors
(front view)

Cable tie

Terminal

7 mm or more

AE

Short spring

A

A

CAUTION

Insert an insulator such as a cable tie to a depth
of 7 mm or more, otherwise the short spring will
not be released.
(4) Insert a cable tie [3 mm wide, 0.5 mm thick]

between terminals 3, 4 and the short spring to

release the short spring.

AC800962 BO

C-153 Harness side
connector (rear view)

CAUTION

Do not insert a test probe into the terminal from
its front side directly as the connector contact
pressure may be weakened.
(5) Resistance measurement between C-153

harness side connector terminals 3 and 4.

OK: Open circuit

Q: Is the check result normal?

YES :

Go to Step 6

NO :

Repair the harness wires between SRS-
ECU connector C-153 (terminal No.3 and 4)
and side-airbag module (LH) connector D-
35 (terminal No.1 and 2).

STEP 6. Check whether the diagnosis code is
reset.

Q: Is diagnosis code B1430 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-157

Code No.B1431: Side-airbag module (LH) (squib) system (open-circuited in the squib circuit)

AC801027

NOTE

: CONNECTOR LOCK SWITCH

CONNECTOR COUPLED: ON
CONNECTOR UNCOUPLED: OFF

Side-Airbag Module (LH) (Squib) Circuit

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 SI : Silver

AC

SRS-ECU

SIDE-AIRBAG
MODULE (SQUIB) (LH)

OPERATION

• The SRS-ECU judges how severe a collision is

by detecting signals from the left and right side
impact sensors. If the impact is over a predeter-
mined level, the SRS-ECU sends an ignition sig-
nal. At this time, if the side air bag safing G-
sensor is on, the SRS side-airbag will inflate.

• The ignition signal is input to the side-airbag

module to inflate the side-airbag.

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if side-airbag module (LH)
squib wire(s) are open-circuited.

PROBABLE CAUSES

• Open circuit in the side-airbag module (LH)

(squib) circuit

• Improper connector contact

• Malfunction of the SRS-ECU

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-158

DIAGNOSIS PROCEDURE

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

AC903877

Connector: D-35 <LHD>

<CLUB CAB>

D-35 (Y)

Harness side
connector
(rear view)

AH

AC903879AF

Connector: D-35 <RHD>

<CLUB CAB>

D-35 (Y)

Harness side
connector
(rear view)

AC903885AO

Connector: D-35 <LHD>

<DOUBLE CAB>

D-35 (Y)

Harness side
connector
(rear view)

AC903886 AJ

Connector: D-35 <RHD>

<DOUBLE CAB>

D-35 (Y)

Harness side
connector
(rear view)

AC706606

AF

Locking button

(2) Disconnect side-airbag module (LH) connector