Mitsubishi L200. Manual — part 616

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-135

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.

AC903877AF

Connector: D-36 <LHD>

D-36 (Y)

Harness side
connector
(rear view)

<CLUB CAB>

AC903879AD

Connector: D-36 <RHD>

D-36 (Y)

Harness side
connector
(rear view)

<CLUB CAB>

AC903885AM

Connector: D-36 <LHD>

D-36 (Y)

Harness side
connector
(rear view)

<DOUBLE CAB>

AC903886 AH

Connector: D-36 <RHD>

D-36 (Y)

Harness side
connector
(rear view)

<DOUBLE CAB>

AC706606

AF

Locking button

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

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-136

D-36. When disconnecting connector D-36,
unlock the connector by sliding the locking button
to the direction of the arrow as shown in the
figure, and then disconnect the connector.

AC507310 BG

D-36

Side-airbag

module (RH) connector

D-36
Harness side
connector

MB991865
(Dummy resistor: 3 )

MB991866

(Resistor harness)

(3) Connect special tool dummy resistor (MB991865)

to special tool resistor harness (MB991866).

CAUTION

Do not insert a test probe into the terminal from
its front side directly as the connector contact
pressure may be weakened.
(4) Insert special tool (MB991866) into the harness

side connector D-36 by backprobing.

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

diagnosis code.

Q: Is diagnosis code B1422 set?

YES :

Go to Step 2

NO :

Replace the front seatback assembly (RH)
(Refer to

P.52B-276

).

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-137

STEP 2. Resistance measurement at the SRS-
ECU connector C-155.
(1) Disconnect the negative battery terminal.

AC801404

AK

Connector: C-155

C-155 (Y)

Harness side
connector
(rear view)

(2) Disconnect SRS-ECU connector C-155.

DANGER

To prevents the air bag from deploying unin-
tentionally, disconnect the side-airbag mod-
ule (RH) connector D-36 to short the squib
circuit.

AC903877AF

Connector: D-36 <LHD>

D-36 (Y)

Harness side
connector
(rear view)

<CLUB CAB>

AC903879AD

Connector: D-36 <RHD>

D-36 (Y)

Harness side
connector
(rear view)

<CLUB CAB>

AC903885AM

Connector: D-36 <LHD>

D-36 (Y)

Harness side
connector
(rear view)

<DOUBLE CAB>

AC903886 AH

Connector: D-36 <RHD>

D-36 (Y)

Harness side
connector
(rear view)

<DOUBLE CAB>

AC706606

AF

Locking button

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

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-138

D-36. When disconnecting connector D-36,
unlock the connector by sliding the locking button
to the direction of the arrow as shown in the
figure, and then disconnect the connector.

AC801564

Section
A - A

C-155 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 53, 54 and the short spring to

release the short spring.

AC800962 BN

C-155 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-155

harness side connector terminals 53, 54 and
body earth.

OK: Open circuit

Q: Is the check result normal?

YES :

Go to Step 3

NO :

Repair the harness wires between SRS-
ECU connector C-155 (terminal No.53 and
54) and side-airbag module (RH) connector
D-36 (terminal No.2 and 1).

STEP 3. Check whether the diagnosis code is
reset.

Q: Is diagnosis code B1422 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 ).