Mitsubishi Montero (2004+). Manual — part 1191
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-99
DTC 43: SRS Warning Light Drive Circuit System Fault 1 (Light does not Illuminate).
AC204592
SRS Warning Light Drive Circuit
AB
AC204230
CONNECTORS : D-03, D-04
AC
D-03 (GR)
D-04 (GR)
ACX01632
CONNECTORS: D-208, D-210
D-208
D-210
JUNCTION BLOCK
(FRONT VIEW)
AG
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-100
.
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.
.
DTC SET CONDITIONS
This DTC is set when an open circuit is detected for
a continuous period of five seconds while the
SRS-ECU is monitoring the SRS warning light and
the light is OFF. (transistor OFF). However, if the
vehicle condition returns to normal, DTC 43 will be
automatically erased, and the SRS warning light will
go out.
.
TROUBLESHOOTING HINTS
• Damaged wiring harnesses or connectors
• Blown bulb
• Malfunction of the SRS-ECU
• Malfunction of the combination meter
.
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.
(1) Disconnect the negative battery terminal.
(2) Connect the negative battery terminal.
(3) Disconnected the SRS-ECU connector E-08.
(4) Turn the ignition switch to the "ON" position.
Q: Does the warning light illuminate?
YES : Erase the diagnostic trouble code memory, and check
the diagnostic trouble code. If DTC 43 sets, replace
the SRS-ECU (Refer to
). Then go to Step
NO : Go to Step 2.
ACX01478 AG
CONNECTOR: E-08
E-08 (Y)
ACX01478AM
CONNECTOR: E-08
E-08 (Y)
HARNESS SIDE
CONNECTOR
(REAR VIEW)
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-101
STEP 2. Check the ground line at the SRS-ECU connector
E-08.
(1) Disconnect the negative battery terminal.
(2) Disconnect SRS-ECU connector E-08.
(3) Connect the negative battery terminal.
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 continuity between terminal 7 and ground.
It should be less than 2 ohms.
Q: Does continuity exist?
YES : Go to Step 3.
NO : Go to Step 5.
STEP 3. Check the SRS warning light bulb.
Q: Has the SRS warning light bulb blown?
YES : Replace the SRS warning light bulb. Then go to Step
NO : Go to Step 4.
ACX01478AM
CONNECTOR: E-08
E-08 (Y)
HARNESS SIDE
CONNECTOR
(REAR VIEW)
AC201527
9 10 11 12
13 1415 16
1 2
3 4
5 6 7 8
17 18 19 20
E-08 HARNESS SIDE
CONNECTOR (REAR VIEW)
AJ
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-102
STEP 4. Check the harness for open circuit between
ignition switch connector D-204 (terminal No.2) and
combination meter D-03 (terminal No.62), and between
combination meter D-04 (terminal No.44) and SRS-ECU
connector E-08 (terminal No.8).
ACX01478AM
CONNECTOR: E-08
E-08 (Y)
HARNESS SIDE
CONNECTOR
(REAR VIEW)
AC204226AG
CLOCK SPRING
CONNECTOR: D-204
D-204
HARNESS
SIDE
CONNECTOR
(FRONT VIEW)
2
5
6
3
4
1
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