Mitsubishi Montero (2004+). Manual - part 1193

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-107

STEP 2. Check the SRS warning light.
(1) Disconnect the negative battery cable.
(2) Disconnect the combination meter connector D-04.
(3) Connect the negative battery cable.
(4) Turn the ignition switch to the "ON" position.

Q: Does the SRS warning light go out when combination 

meter connector D-04 is disconnected?
YES : Go to Step 3.
NO :  Replace the combination meter. Then go to Step 4.

AC204231AH

CONNECTOR : D-04

D-04 (GR)

47

38

42

39

44 45 46

43

35

37

36

34

33

40 41

32

31

D-04 HARNESS SIDE
CONNECTOR (REAR VIEW)

ACX01667

AT

TEMP

SRS

P
R
N
D

5
4
3
2
1

x1000r/min

2

3

4

5

6

7

8

1

AB

SRS WARNING LIGHT

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-108

STEP 3. Check the harness for short circuit to ground 
between SRS-ECU connector E-08 (terminal No.8) and 
combination meter connector D-04 (terminal No.44).
Q: Is the harness wire between the SRS-ECU connector 

E-08 (terminal No.8) and combination meter connector 
D-04 (terminal No.44) in good condition?
YES : Erase the diagnostic trouble code memory, and check 

the diagnostic trouble code. If DTC 43 sets, replace 
the SRS-ECU (Refer to 

P.52B-215

). Then go to Step 

4.

NO :  Repair the harness wire between SRS-ECU 

connector E-08 and combination meter connector 
D-04. Then go to Step 4.

STEP 4. Recheck for diagnostic trouble code.
Q: Is DTC 43 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

). 

ACX01478AM

CONNECTOR: E-08

E-08 (Y)

HARNESS SIDE
CONNECTOR
(REAR VIEW)

AC204231AH

CONNECTOR : D-04

D-04 (GR)

47

38

42

39

44 45 46

43

35

37

36

34

33

40 41

32

31

D-04 HARNESS SIDE
CONNECTOR (REAR VIEW)

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-109

DTC 44: SRS Warning Light Drive Circuit System Fault 2

.

CIRCUIT OPERATION

• Power for the SRS warning light is supplied from 

the ignition switch (IG1) circuit.

• The SRS warning light illuminates when the igni-

tion switch is turned to the "ON" position and 
goes out after approximately seven seconds if 
there is not a malfunction in the SRS system.

.

AC204592

SRS Warning Light Drive Circuit

AB

ACX01478 AG

CONNECTOR: E-08

E-08 (Y)

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-110

DTC SET CONDITIONS
This DTC is set under one of the following cases 
while the SRS-ECU is monitoring the warning light 
drive circuit:

• When a short circuit occurs in the warning light 

drive circuit.

• When a malfunction is detected in the output 

transistor inside the SRS-ECU.

However, if the vehicle condition returns to normal, 
DTC 44 will be automatically erased, and the SRS 
warning light will go out.

.

TROUBLESHOOTING HINTS

• Damaged wiring harnesses or connectors

• Malfunction of the SRS-ECU

.

DIAGNOSIS

Required Special Tool:

• 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)

STEP 1. Check the SRS warning light drive circuit system 
(Refer to 

P.52B-22

).

Q: Is the SRS warning light drive circuit normal?

YES : Erase the diagnostic trouble code memory, and check 

the diagnostic trouble code. If DTC 43 sets, replace 
the SRS-ECU (Refer to 

P.52B-215

). Then go to Step 

2.

NO :  Replace the combination meter (Refer to GROUP 

54A, Combination Meter Assembly 

P.54A-76

). Then 

go to Step 2.

STEP 2. Recheck for diagnostic trouble code.
Q: Is DTC 44 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

). 

DTC 46 IMPROPER INSTALLATION OF SRS-ECU

.

TROUBLE JUDGMENT
This DTC is set when an SRS-ECU, designed only 
for the driver's air bag, is installed on the vehicle, 
which has both driver's and passenger's air bags.

.

TROUBLESHOOTING HINTS

• Malfunction of the SRS-ECU

.

DIAGNOSIS
Replace the SRS-ECU (Refer to 

P.52B-215

).