Mitsubishi L200. Manual - part 618

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-143

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

Short spring

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.

(5) Connect the negative battery terminal.

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

AC800963AP

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.
(7) Voltage measurement between C-155 harness

side connector terminals 53, 54 and body earth.

OK: 1 V or less

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 (RH) air bag module
connector D-36 (terminal No.2 and 1).

STEP 3. Check whether the diagnosis code is
reset.

Q: Is diagnosis code B1423 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 ).

Code No.B1426: G-sensor of side impact sensor (RH) failure

Code No.B1436: G-sensor of side impact sensor (LH) failure

DIAGNOSIS CODE SET CONDITIONS
These diagnosis codes are set if the following condi-
tions are detected from the analogue G-sensor
inside the side impact sensor output:

• Analogue G-sensor is not operating.

• Analogue G-sensor characteristics are abnormal.

• Analogue G-sensor output is abnormal.

PROBABLE CAUSES
Malfunction of side impact sensor (RH) (for diagnosis
code B1426) and side impact sensor (LH) (for diag-
nosis code B1436)

DIAGNOSIS PROCEDURE

Replace the SRS-ECU and side impact sensor (RH)
(for diagnosis code B1426) or replace the SRS-ECU
and side impact sensor (LH) (for diagnosis code
B1436) (Refer to

P.52B-266

<SRS-ECU>,

P.52B-

282

<Side impact sensor>).

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-144

Code No.B1427: Side impact sensor (RH) voltage error

AC801032

SIDE IMPACT
SENSOR (RH)

SRS-ECU

Side Impact Sensor (RH) 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

SIDE IMPACT SENSOR INTERFACE

OPERATION
The side impact sensor transmits acceleration data
to the SRS-ECU. The SRS-ECU then determines. if
the side and/or curtain air bags should be inflated,
and then sends an ignition signal. The side impact
sensor also diagnoses itself, and sends a diagnosis
code to the SRS-ECU if a problem occurs.

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code will set when the power supply
voltage to the side impact sensor (RH) remains less
than a predetermined value for one second.

PROBABLE CAUSES

• Damaged wiring harness or connectors

• Malfunction of the side impact sensor (RH)

• Malfunction of the SRS-ECU

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-145

DIAGNOSIS PROCEDURE

STEP 1. Check the harness wires for open circuit
and short circuit between SRS-ECU connector C-
155 (terminal No.61 and 62) and side impact
sensor (RH) connector D-37 (terminal No.1 and
2).

AC801404

Connector: C-155

C-155 (Y)