Mitsubishi Outlander (2003+). Manual — part 374

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-95

Code No.64: Passenger's (front) air bag module (squib) system (short-circuited to the power supply)

OPERATION

•

The SRS-ECU judges how severe a collision is
by detecting signals from the front impact sensors
and the front air bag analog G-sensor. If the
impact is over a predetermined level, the
SRS-ECU outputs 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.

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if the passenger's (front)
air bag squib wire(s) are short-circuited to the power
supply. However, if no diagnosis code resets, the
SRS warning lamp will be switched off (diagnosis
code will be retained).

PROBABLE CAUSES

•

Damaged harness wires and connectors

•

Short to the power supply in the passenger's air
bag module (squib) harness

•

Malfunction of the SRS-ECU

AIR BAG DRIVE
CIRCUIT

CONNECTOR
LOCK
SWITCH

NOTE

CONNECTOR
COUPLED: ON
CONNECTOR
UNCOUPLED: OFF

CONNECTOR
LOCK
SWITCH

MICROCOMPUTER

SRS-ECU

AIR BAG MODULE
(SQUIB)
(PASSENGER'S
SIDE)

Wire colour code
B : Black LG : Light green
G : Green L : Blue
W : White Y : Yellow
SB : Sky blue BR : Brown
O : Orange GR : Gray
R : Red P : Pink V : Violet

AC301794

Passenger's (Front) Air Bag Module (Squib) Circuit

AB

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-96

DIAGNOSIS PROCEDURE

STEP1. Check the passenger's air bag module.
(Check whether the diagnosis code is reset.)
(1) Disconnect the negative battery terminal.

(2) Unclip passenger’s air bag module connector

C-09.

(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) Disconnect the passenger's air bag module

connector C-09, and insert special tool
(MB991866) into the harness side connector by
backprobing.

(5) Connect the negative battery terminal.

(6) Erase the diagnosis code memory, and check the

diagnosis code.

Q: Is diagnosis code 64 set?

YES :

Go to Step 2.

NO :

Replace the passenger's air bag module
(Refer to

P.52B-179

). Then go to Step 3.

STEP 2. Measure the voltage at the SRS-ECU
connector C-115.

(1) Disconnect SRS-ECU connector C-115.

CAUTION

To prevents the air bag from deploying
unintentionally, disconnect the passenger’s air
bag module connector C-09 to short the squib
circuit.
(2) Disconnect the passenger's air bag module

connector C-09.

AC301718

Connector: C-09 <LHD>

AD

C-09 (R)

Glove box striker

2 1

Harness side
connector (front view)

AC309254 AB

Connector: C-09 <RHD>

C-09 (R)

Glove box striker

2 1

Harness side
connector (front view)

AC300956AB

MB991865 (Dummy
resistor : 3

Ω)

C-09 Harness side
connector

C-09 Passenger's
air bag module connector

MB991866
(Resistor harness)

AC301661AC

Harness side
connector
(front view)

Connector: C-115

SRS-ECU

C-115 (Y)

Center lower
panel

1110 9

1

2

3

1413

12

4

5

6

16

8

15

7

17

18

19

20

AC301718

Connector: C-09 <LHD>

AD

C-09 (R)

Glove box striker

2 1

Harness side
connector (front view)

AC309254 AB

Connector: C-09 <RHD>

C-09 (R)

Glove box striker

2 1

Harness side
connector (front view)

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-97

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

CAUTION

Do not insert a test probe into the terminal from
its front side directly as the connector contact
pressure may be weakened.
(4) Measure the voltage between C-115 harness

side connector terminals 9, 10 and body earth.

OK: 0 V

Q: Is the check result normal.

YES :

Erase the diagnosis code memory, and

check the diagnosis code. If diagnosis code
64 sets, replace the SRS-ECU (Refer to

P.52B-178

). Then go to Step 3 .

NO :

Repair the harness wires between
SRS-ECU connector C-115 (terminal No.9
and 10) and passenger's air bag module
connector C-09 (terminal No.1 and 2). Then
go to Step 3.

STEP 3. Check whether the diagnosis code is
reset.

Q: Is diagnosis code 64 set?

YES :

Return to Step 1.

NO :

The procedure is complete (If no
malfunctions are found in all steps, an
intermittent malfunction is suspected. Refer
to GROUP 00

−

How to Use

Troubleshooting/Inspection Service Points

P.00-6

).

13 14 15 16 17 18 19 20

5 6 7 8 9 10 11 12

1 2

3 4

AC301034

C-115 Harness side
connector (rear view)

AB

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-98

Code No.65: Passenger's (front) air bag module (squib) system (short-circuited to the earth)

OPERATION

•

The SRS-ECU judges how severe a collision is
by detecting signals from the front impact sensors
and the front air bag analog G-sensor. If the
impact is over a predetermined level, the
SRS-ECU outputs 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.

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if the passenger's (front)
air bag squib wire(s) are short-circuited to the earth.
However, if no diagnosis code resets, the SRS
warning lamp will be switched off (diagnosis code will
be retained).

PROBABLE CAUSES

•

Damaged harness wires and connectors

•

Short to the earth in the passenger's air bag
module (squib) harness

•

Malfunction of the SRS-ECU

AIR BAG DRIVE
CIRCUIT

CONNECTOR
LOCK
SWITCH

NOTE

CONNECTOR
COUPLED: ON
CONNECTOR
UNCOUPLED: OFF

CONNECTOR
LOCK
SWITCH

MICROCOMPUTER

SRS-ECU

AIR BAG MODULE
(SQUIB)
(PASSENGER'S
SIDE)

Wire colour code
B : Black LG : Light green
G : Green L : Blue
W : White Y : Yellow
SB : Sky blue BR : Brown
O : Orange GR : Gray
R : Red P : Pink V : Violet

AC301794

Passenger's (Front) Air Bag Module (Squib) Circuit

AB