Mitsubishi Montero (2004+). Manual — part 1187

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-83

STEP 2. Check SRS-ECU connector E-07, E-08 for damage.
(1) Disconnect SRS-ECU connectors E-07 and E-08.
(2) Check the connector lock switch terminal inside the harness

side connector for improper contact or deformation.

Q: Are the SRS-ECU connector E-07, E-08 in good

condition?
YES : Eras the diagnostic trouble code memory, and check

the diagnostic trouble code. If DTC 34 sets, replace
the SRS-ECU (Refer to

P.52B-215

). Then go to Step

3.

NO : Repair or replace the SRS-ECU connector E-07, E-08

(Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

). Then go to Step 3.

STEP 3. Recheck for diagnostic trouble code.
Q: Is DTC 34 set?

YES : There is no action to be taken.
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

).

AC309378

34 35 36 37 38 39 40 41 42

25 26 27 28 29 30 31 32 33

21 22

23 24

E-08
HARNESS SIDE
CONNECTOR
(REAR VIEW)

E-07
HARNESS SIDE
CONNECTOR
(REAR VIEW)

AB

CONNECTORS: E-07, E-08

E-07 (Y), E-08(Y)

AC006249 AL

SRS-ECU HARNESS SIDE CONNECTOR
(FRONT VIEW)

CONNECTOR LOCK
SWITCH TERMINAL

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-84

DTC 35: SRS-ECU Air Bag Condition Monitor Detects Deployed Air Bag

.

DTC SET CONDITIONS
This DTC is set after the air bag has deployed. If this
DTC is set before the air bag has deployed, the
cause is probably a malfunction inside the
SRS-ECU.

.

TROUBLESHOOTING HINTS
Malfunction of the SRS-ECU

.

DIAGNOSIS
Replace the SRS-ECU (Refer to

P.52B-215

).

DTC 39 AIR BAGS DEPLOYED SIMULTANEOUSLY

.

TROUBLE JUDGMENT
This DTC will be set when the airbags deployed simulta-
neously. If this DTC is set before the deployment, a failure may
has occurred in the SRS-ECU.

.

POSSIBLE CAUSES

• Malfunction of the SRS-ECU

DIAGNOSIS

Replace the SRS-ECU (Refer to

P.52B-215

).

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-85

DTC 41: IG1 Power Circuit System (Fuse No.6 Circuit)

.

CIRCUIT OPERATION

• The SRS-ECU is powered from the ignition

switch (IG1).

• The SRS-ECU power is supplied from two cir-

cuits. Even if one circuit is shut off, the air bag
can inflate.

.

ACX01631

IG1 Power Circuit System (Fuse No.6 Circuit)

AB

ACX01632

CONNECTORS: D-208, D-210

D-208

D-210

JUNCTION BLOCK
(FRONT VIEW)

AG

ACX01478 AG

CONNECTOR: E-08

E-08 (Y)

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-86

DTC SET CONDITIONS
This DTC is set if the voltage between the IG1 termi-
nals (fuse No.6 circuit) and ground is lower than a
predetermined value for a continuous period of five
second or more. However, if the vehicle condition
returns to normal, DTC number 41 will be automati-
cally erased, and the SRS warning light will switch
off.

.

TROUBLESHOOTING HINTS

• Damaged wiring harnesses or connectors

• Malfunction of the SRS-ECU

.

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B (Vehicles without

CAN communication system)

• MB991223 (MB991222): Harness set (Probe)

STEP 1. Check junction block fuse number 6.
Q: Is the fuse burned out?

YES : Go to Step 4.
NO : Go to Step 2.

AC203896AC

JUNCTION
BLOCK

FUSE No.6