Mitsubishi Montero (2002-2004). Manual — part 377
INPUT SIGNAL PROCEDURES
TSB Revision
SWS INPUT SIGNAL PROCEDURES
54Bc-55
STEP 3. Check hazard warning light switch connector D-
103 for loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is hazard warning light switch connector D-103 in good
condition?
YES : Go to Step 4.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. If the equipment, which are described in
"CIRCUIT OPERATION", work normally, the input
signal from the hazard warning light switch should be
normal.
STEP 4. Check the wiring harness between hazard warning
light switch connector D-103 (terminal 2) and ground.
Q: Is the wiring harness between hazard warning light
switch connector D-103 (terminal 2) and ground in good
condition?
YES : No action is necessary and testing is complete.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. If the
equipment, which are described in "CIRCUIT
OPERATION", work normally, the input signal from
the hazard warning light switch should be normal.
AC204170
CONNECTOR : D-103
AK
1
2
4 3
HARNESS
SIDE
D-103
AC204170
CONNECTOR : D-103
AK
1
2
4 3
HARNESS
SIDE
D-103
INPUT SIGNAL PROCEDURES
TSB Revision
SWS INPUT SIGNAL PROCEDURES
54Bc-56
STEP 5. Check hazard warning light switch connector D-
103 and ETACS-ECU connector D-224 for loose, corroded
or damaged terminals, or terminals pushed back in the
connector.
Q: Are hazard warning light switch connector D-103 and
ETACS-ECU connector D-224 in good condition?
YES : Go to Step 6.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. If the equipment, which are described in
"CIRCUIT OPERATION", work normally, the input
signal from the hazard warning light switch should be
normal.
STEP 6. Check the wiring harness between hazard warning
light switch connector D-103 (terminal 1) and ETACS-ECU
connector D-224 (terminal 27).
Q: Is the wiring harness between hazard warning light
switch connector D-103 (terminal 1) and ETACS-ECU
connector D-224 (terminal 27) in good condition?
YES : Replace the ETACS-ECU. If the equipment, which
are described in "CIRCUIT OPERATION", work
normally, the input signal from the hazard warning
light switch should be normal.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. If the
equipment, which are described in "CIRCUIT
OPERATION", work normally, the input signal from
the hazard warning light switch should be normal.
AC204170
CONNECTOR : D-103
AK
1
2
4 3
HARNESS
SIDE
D-103
AC204174
CONNECTOR : D-224
AD
D-224(B)
D-224(B)
HARNESS SIDE
21
23
24
22
32
3433
31
26
27
28
3029
38
39
40
36
37
25
35
AC204170
CONNECTOR : D-103
AK
1
2
4 3
HARNESS
SIDE
D-103
AC204174
CONNECTOR : D-224
AD
D-224(B)
D-224(B)
HARNESS SIDE
21
23
24
22
32
3433
31
26
27
28
3029
38
39
40
36
37
25
35
INPUT SIGNAL PROCEDURES
TSB Revision
SWS INPUT SIGNAL PROCEDURES
54Bc-57
INSPECTION PROCEDURE P-3: ETACS-ECU does not receive any signal from the driver's seat belt
switch.
.
CIRCUIT OPERATION
The ETACS-ECU operates the following functions
and equipment according to signal from the driver's
seat belt switch:
• Seat belt tone alarm function
• Seat belt warning light
.
Seat Belt Switch Input Circuit
AC204170
CONNECTOR : D-125
BE
AC204174
CONNECTOR : D-224
D-224(B)
AG
AC204177
CONNECTOR : F-18
AL
INPUT SIGNAL PROCEDURES
TSB Revision
SWS INPUT SIGNAL PROCEDURES
54Bc-58
TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the equipment and func-
tions, which are described in "CIRCUIT OPERA-
TION", do not work normally.
.
TROUBLESHOOTING HINTS
• The driver's inner seat belt (driver's seat belt
switch) may be defective
• The ETACS-ECU may be defective
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991502: Scan Tool (MUT-II)
STEP 1. Check the driver's seat belt switch.
Disconnect driver's seat belt switch connector F-18. Then
check continuity between the switch terminals.
Q: Is the driver's seat belt switch in good condition?
YES : Go to Step 2.
NO : Replace the driver's inner seat belt. If the functions,
which are described in "CIRCUIT OPERATION", work
normally, the input signal from the driver's seat belt
switch should be normal.
ITEM
TESTER
CONNECTION
SPECIFIED
CONDITION
Fastened seat
belt
1
− 2
Open circuit
Unfastened seat
belt
1
− 2
Less than 2 ohms
ACX00636
TONGUE
BUCKLE
AC
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