Mitsubishi Montero (2004+). Manual — part 1199
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-131
STEP 1. Check the driver's seat belt pre-tensioner. (Using
scan tool MB991958, read the diagnostic trouble code).
(1) Disconnect the negative battery terminal.
(2) Disconnect the driver's seat belt pretensioner connector
F-27.
(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 66 set?
YES : Go to Step 2.
NO : Replace the driver's seat belt pre-tensioner (Refer to
AC204126
AD
CONNECTOR: F-27
F-27 (R)
CENTER
PILLAR
1 2
HARNESS SIDE
CONNECTOR
(REAR VIEW)
AC006042 AY
MB991866
(RESISTOR HARNESS)
F-27 HARNESS
CONNECTOR
MB991865 (DUMMY
RESISTOR: 3
Ω)
F-27 SEAT BELT
PRE-TENSIONER
CONNECTOR (DRIVER'S SIDE)
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-132
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.
(3) Turn the ignition switch to the "ON" position.
CAUTION
Do not insert a test probe into the terminal from its front
side directly as the connector contact pressure may be
weakened.
(4) Measure the voltage between E-07 harness connector
terminals 29, 30 and body ground.
Voltage should measure 0 volt.
Q: Is the measured voltage within the specified range?
YES : Erase the diagnostic trouble code memory, and check
the diagnostic trouble code. If DTC 65 sets, replace
the SRS-ECU (Refer to
). Then go to Step
NO : Go to Step 3.
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
AD
CONNECTOR: F-27
F-27 (R)
CENTER
PILLAR
1 2
HARNESS SIDE
CONNECTOR
(REAR VIEW)
AC006259
34 35 36 37 38 39 40 41 42
25 26 27 28 29 30 31 32 33
21 22
23 24
AR
E-07 HARNESS SIDE
CONNECTOR (REAR VIEW)
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-133
STEP 3. Check the harness wires for short circuit to power
supply 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.
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 66 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
AD
CONNECTOR: F-27
F-27 (R)
CENTER
PILLAR
1 2
HARNESS SIDE
CONNECTOR
(REAR VIEW)
AC204603AC
CONNECTOR: E-19
FLOOR
CONSOLE
E-19
2
1
4
3
E-19
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-134
DTC 67: Driver's Seat Belt Pre-Tensioner (Squib) System Fault for Ground Circuit (Short-Circuited to
Ground)
SEAT BELT
PRETENSIONER
(LH)
MICROCOMPUTER
AIR BAG DRIVE CIRCUIT
SRS-ECU
CONNECTOR
LOCK SWITCH
CONNECTOR
LOCK SWITCH
NOTE
: CONNECTOR
COUPLED: ON
CONNECTOR
UNCOUPLED: OFF
Driver's Seat Belt Pre-Tensioner (Squib)
ACX01478AI
CONNECTOR: E-07
E-07 (Y)
AC204603AB
CONNECTOR: E-19
FLOOR
CONSOLE
E-19
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