Mitsubishi Montero (2004+). Manual — part 1184
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-71
DTC 28: Passenger’s (Front) Seat Belt Pre-Tensioner (Squib) System Fault 1 (Short Circuit between
Terminals of the Squib Circuit)
SEAT BELT
PRETENSIONER
(RH)
MICROCOMPUTER
AIR BAG DRIVE CIRCUIT
SRS-ECU
CONNECTOR
LOCK SWITCH
CONNECTOR
LOCK SWITCH
NOTE
: CONNECTOR
COUPLED: ON
CONNECTOR
UNCOUPLED: OFF
Passenger's (Front) Seat Belt Pre-tensioner (Squib)
ACX01478AI
CONNECTOR: E-07
E-07 (Y)
AC204603AD
CONNECTOR: E-16
FLOOR
CONSOLE
E-16
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-72
.
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
• Improper engaged connector or defective short
spring*
• Short circuit between the passenger's seat belt
pretensioner (squib) circuit terminals
• Damaged connector(s)
• Malfunction of the SRS-ECU
.
NOTE: *: The squib circuit connectors integrate a
"short" spring (which prevents the air bag from
deploying unintentionally due to static electricity by
shorting the positive wire to the ground wire in the
squib circuit when the connectors are disconnected)
(Refer to
). Therefore, if connector E-07 or
F-29 is damaged or improperly engaged, the short
spring may not be released when the connector is
connected.
.
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)
• MB991865: Dummy resister
• MB991866: Resister harness
AC204127
AB
CONNECTOR: F-29
F-29 (R)
CENTER
PILLAR
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-73
STEP 1. Check the diagnostic trouble code.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Turn the ignition switch to the "ON" position.
(2) Check if the DTC is set.
(3) Turn the ignition switch to the "LOOK (OFF)" position.
Q: Is DTC 34 set?
YES : Go to Step 2.
NO : Go to Step 3.
STEP 2. Check the SRS-ECU connector E-07.
Q: Is connector correctly engaged?
YES : Go to Step 3.
NO : Engage the connector to the place. Then go to Step 7.
AC307591 AB
MB991911
DATA LINK
CONNECTOR
MB991824
MB991827
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)
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-74
STEP 3. Check SRS-ECU connector E-07 and passenger’s
seat belt pre-tensioner connector F-29. (Using scan tool
MB991958, read the diagnostic trouble code).
(1) Disconnect the negative battery terminal.
(2) Disconnection connectors E-07 and F-29, and then
reconnect them.
(3) Connect the negative battery terminal.
(4) Erase the diagnostic trouble code memory, and the
diagnostic trouble code.
Q: Is DTC 28 set?
YES : Go to Step 4.
NO : The procedure is complete. It is assumed that DTC 28
set as connector E-07 or F-29 was engaged
improperly.
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
AD
CONNECTOR: F-29
F-29 (R)
CENTER
PILLAR
1 2
HARNESS SIDE
CONNECTOR
(REAR VIEW)
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст