Mitsubishi Montero (2002-2004). Manual — part 808
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS
52Bb-101
STEP 2. Check the driver's seat belt pretensioner circuit at
the SRS-ECU connector E-07.
(1) Disconnect SRS-ECU connector E-07.
(2) Disconnect driver's seat belt pretensioner connector F-27.
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 29, 30 and body ground.
It should be open circuit.
Q: Does continuity exist?
YES : Erase the diagnostic trouble code memory, and check
the diagnostic trouble code. If DTC 67 sets, replace
the SRS-ECU. (Refer to
.) Then go to Step
NO : Go to Step 3.
STEP 3. Check harness wires for short circuit to ground
between SRS-ECU connector E-07 (terminal No.29 and 30)
and driver's seat belt pre-tensioner connector F-27
(terminal No.1 and 2).
NOTE: After inspecting intermediate connector E-19, inspect
the wiring harness. If the intermediate connector E-19 is dam-
aged, repair or replace it. (Refer to GROUP 00E, Harness Con-
nector Inspection
.) Then go to Step 4.
ACX01478AI
CONNECTOR: E-07
E-07 (Y)
AC204126
AB
CONNECTOR: F-27
F-27 (R)
CENTER
PILLAR
AC201666
34 35 36 37 38 39 40 41 42
25 26 27 28 29 30 31 32 33
2122
23 24
E-07 HARNESS CONNECTOR:
HARNESS SIDE
AF
AC204603AC
CONNECTOR: E-19
FLOOR
CONSOLE
E-19
2
1
4
3
E-19
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS
52Bb-102
Q: Are the harness wires between SRS-ECU connector E-
07 (terminal No.29 and 30) and driver's seat belt pre-
tensioner connector F-27 (terminal No.1 and 2) in good
condition?
YES : Go to Step 4.
NO : Repair the harness wires between SRS-ECU
connector E-07 and driver's seat belt pre-tensioner
connector F-27. Then go to Step 4.
STEP 4. Recheck for diagnostic trouble code.
Q: Is DTC 67 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)
AC204126
AC
CONNECTOR: F-27
F-27 (R)
CENTER
PILLAR
1 2
HARNESS
CONNECTOR:
HARNESS SIDE
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS
52Bb-103
DTC 68: Passenger's Seat Belt Pre-Tensioner (Squib) System Fault for Power Supply Circuit (Short-
Circuited to Power Supply)
.
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-104
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
This DTC is set if there is abnormal resistance
between the input terminals of the passenger's seat
belt pre-tensioner (squib).
.
TROUBLESHOOTING HITS
• Damaged wiring harnesses or connectors
• Short to the power supply in the passenger's seat
belt pretensioner (squib) harness
• 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 side
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 68 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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