Mitsubishi Montero (2002-2004). Manual — part 803

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS

52Bb-81

STEP 4. Check the harness for short circuit to power
supply between SRS-ECU connector E-08 (terminal No.11
and 12) and clock spring connector D-206 (terminal Noo.3
and 4).
Q: Are harness wires between the SRS-ECU connector E-

08 (terminal No.11 and 12) and clock spring connector
D-206 (terminal Noo.3 and 4) in good condition?
YES : Go to Step 5.
NO : Repair the harness wires between SRS-ECU

connector E-08 and clock spring connector D-206.
Then go to Step 5.

STEP 5. Recheck for diagnostic trouble code.
Q: Is DTC 61 set?

YES : Return to Step 1.
NO : The procedure is complete. (If no malfunctions are not

found in all steps, an intermittent malfunction is
suspected. Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

− How to

Cope with Intermittent Malfunction

P.00-6

.)

ACX01478AH

CONNECTOR: E-08

E-08 (Y)

HARNESS
CONNECTOR:
HARNESS SIDE

AC204226AC

CONNECTOR: D-206

CLOCK SPRING

D-206 (Y)

HARNESS
CONNECTOR:
HARNESS SIDE

1 2

4

3

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS

52Bb-82

DTC 62: Driver’s Air Bag Module (Squib) System Fault for Ground Circuit (Short-Circuited to ground)

.

AC204430

Driver's Air Bag Module (Squib) Circuit

NOTE

: CONNECTOR LOCK SWITCH

CONNECTOR

CONNECTED: ON
CONNECTOR

DISCONNECTED: OFF

AB

AC204226AD

CLOCK SPRING

D-206 (Y)

CONNECTORS: D-206, D-229

D-229

ACX01478 AG

CONNECTOR: E-08

E-08 (Y)

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS

52Bb-83

CIRCUIT 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.

.

DTC SET CONDITIONS
This DTC is set if there is abnormal resistance
between the input terminals of the driver's side air
bag module (squib). However, if no DTC resets, the
SRS warning light will be switched off (DTC will be
retained).

.

TROUBLESHOOTING HINTS

• Malfunction of the clock spring

• Damaged harness wires and connectors

• Short to the ground in the driver's air bag module

(squib) harness

• Malfunction of the SRS-ECU

.

DIAGNOSIS

Required Special Tools:

• MB991502: Scan Tool (MUT-II)

• MB991865: Dummy resister

• MB991866: Resister harness

STEP 1. Check the driver's air bag module.
(1) Disconnect the negative battery terminal.
(2) By sliding the A section (in the figure) of air bag module

connector D-229 in arrow direction, disconnect the
connector.

(3) Connect special tool MB991865 to special tool 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 clock spring side air bag

module connector D-229 by backprobing.

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

recheck the diagnostic trouble code.

Q: Is DTC 62 set?

YES : Go to Step 2.
NO : Replace the driver's air bag module. (Refer to

P.52Ba-33

.) Then go to Step 5.

AC100441AE

D-229 AIR BAG MODULE
CONNECTOR

STEERING WHEEL

A

AC006030 AH

D-229 AIR BAG
MODULE
CONNECTOR

MB991865
(DUMMY RESISTOR : 3

Ω)

MB991866 (RESISTOR
HARNESS)

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS

52Bb-84

STEP 2. Check the clock spring.
(1) Disconnect the negative battery terminal.
(2) Disconnect the clock spring connector D-206.
(3) Connect special tool MB991865 to special tool 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 clock spring harness side

connector D-206 (terminal No.3 and 4) by backprobing.

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

diagnostic trouble code.

Q: Is DTC 62 set?

YES : Go to Step 3.
NO : Replace the clock spring. (Refer to

P.52Bb-85

.) Then

go to Step 5.

AC006031

D-206 CLOCK SPRING
CONNECTOR

AJ

MB991865
(DUMMY RESISTOR : 3

Ω)

MB991866 (RESISTOR
HARNESS)

1 2

4

3

(REAR VIEW)