Mitsubishi Montero (2002-2004). Manual — part 794
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS
52Bb-45
STEP 5. Check the passenger's seat belt pretensioner
circuit at the SRS-ECU connector E-07.
(1) Disconnect SRS-ECU connector E-07.
(2) Disconnect passenger's seat belt pretensioner connector F-
29.
CAUTION
Do not insert a test probe into the terminal from its front
side directly as the connector contact pressure may be
weakened.
(3) Check for continuity between E-07 harness connector
terminals 27 and 28.
It should be open circuit.
Q: Does continuity exist?
NO : Eras the diagnostic trouble code memory, and check
the diagnostic trouble code. If DTC 28 sets, replace
the SRS-ECU. (Refer to
YES : Go to Step 6.
STEP 6. Check the harness for short circuit between SRS-
ECU connector E-07 (terminal No.27 and 28) and
passenger’s seat belt pre-tensioner connector F-29
(terminal No.1 and 2).
NOTE: After inspecting intermediate connector E-16, inspect
the wiring harness. If the intermediate connector E-16 is dam-
aged, repair or replace it. (Refer to GROUP 00E, Harness Con-
nector Inspection
.) Then go to Step 7.
ACX01478AI
CONNECTOR: E-07
E-07 (Y)
AC204127
AB
CONNECTOR: F-29
F-29 (R)
CENTER
PILLAR
AC100326
34 35 36 37 38 39 40 41 42
25 26 27 28 29 30 31 32 33
21 22
23 24
E-07 HARNESS
CONNECTOR:
HARNESS SIDE
AH
AC204603AE
CONNECTOR: E-16
FLOOR
CONSOLE
E-16
5
4
3
2
1
E-16
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS
52Bb-46
Q: Are harness wires between SRS-ECU connector E-07
(terminal No.27 and 28) connector and passenger’s seat
belt pre-tensioner connector F-29 (terminal No.1 and 2)
in good condition?
YES : Go to Step 7.
NO : Repair the harness wires between SRS-ECU
connector E-07 and passenger’s seat belt pre-
tensioner connector F-29. Then go to Step 7.
STEP 7. Recheck for diagnostic trouble code.
Q: Is DTC 28 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
ACX01478AJ
CONNECTOR: E-07
E-07 (Y)
34 35 36 37 38 39 40 41 42
25 26 27 28 29 30 31 32 33
21 22
23 24
HARNESS SIDE
CONNECTOR
(REAR VIEW)
AC204127
AC
CONNECTOR: F-29
F-29 (R)
CENTER
PILLAR
1 2
HARNESS
CONNECTOR:
HARNESS SIDE
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS
52Bb-47
DTC 29: Passenger’s (Front) Seat Belt Pre-Tensioner (Squib) System Fault 2 (Open in the Squib
Circuit)
.
AC102676
Passenger's (Front) Seat Belt Pre-tensioner (Squib)
AB
ACX01478AI
CONNECTOR: E-07
E-07 (Y)
AC204603AD
CONNECTOR: E-16
FLOOR
CONSOLE
E-16
AC204127
AB
CONNECTOR: F-29
F-29 (R)
CENTER
PILLAR
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS
52Bb-48
CIRCUIT OPERATION
The side impact sensor includes an analog G sensor
and CPU, etc. The CPU monitors the analog G sen-
sor output signal. If the CPU judges that the side-air-
bags should be deployed, it sends a fire signal to the
SRS-ECU to deploy the side-airbags. Besides that,
the CPU diagnoses the internal components of the
side impact sensor. If a malfunction occurs, it
requests the SRS-ECU to set a diagnostic trouble
code.
.
DTC SET CONDITIONS
These DTC are set if there is abnormal resistance
between the input terminals of the passenger's seat
belt pre-tensioner (squib).
.
TROUBLESHOOTING HITS
• Open circuit in the passenger's seat belt preten-
sioner (squib) circuit
• Improper connector contact
• Malfunction of the SRS-ECU
.
DIAGNOSIS
Required Special Tools:
• MB991502: Scan Tool (MUT-ll)
• MB991865: Dummy resister
• MB991866: Resister harness
STEP 1. Check the passenger's seat belt pre-tensioner.
(1) Disconnect the negative battery terminal.
(2) Disconnect the passenger's seat belt pretensioner
connector F-29.
(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 the harness connector by
backprobing.
(5) Connect the negative battery terminal.
(6) Erase diagnostic trouble code memory, and then check the
diagnostic trouble code.
Q: Is DTC 29 set?
YES : Go to Step 2.
NO : Replace the passenger's seat belt pre-tensioner.
(Refer to
AC204127
AB
CONNECTOR: F-29
F-29 (R)
CENTER
PILLAR
AC006042 AZ
MB991866
(RESISTOR HARNESS)
F-29 HARNESS
CONNECTOR
MB991865 (DUMMY
RESISTOR: 3
Ω
)
F-29 SEAT BELT
PRE-TENSIONER
CONNECTOR (PASSNGER'S SIDE)
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