Mitsubishi Montero (2004+). Manual — part 824
INPUT SIGNAL PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-553
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.
INSPECTION PROCEDURE P-3: ETACS-ECU does not receive any signal from the driver's seat belt
switch.
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
Seat Belt Switch Input Circuit
INPUT SIGNAL PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-554
.
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
.
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
• 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
AC204170
CONNECTOR : D-125
BE
AC204174
CONNECTOR : D-224
D-224(B)
AG
AC204177
CONNECTOR : F-18
AL
INPUT SIGNAL PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-555
STEP 1. Check driver's seat belt switch connector F-18 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is driver's seat belt switch connector F-18 in good
condition?
YES : Go to Step 2.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. If the functions, which are described in
"CIRCUIT OPERATION", work normally, the input
signal from the driver's seat belt switch should be
normal.
STEP 2. 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 3.
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.
AC204177
CONNECTOR : F-18
AD
HARNESS SIDE
2 1
F-18
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
INPUT SIGNAL PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-556
STEP 3. Check the battery ground circuit to the driver's
seat belt switch. Test at driver's seat belt switch connector
F-18.
(1) Disconnect driver's seat belt switch connector F-18 and
measure the resistance available at the wiring harness side
of the connector.
(2) Measure the resistance value between terminal 1 and
ground.
• The resistance should equal 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES : Go to Step 5.
NO : Go to Step 4.
STEP 4. Check the wiring harness between driver's seat
belt switch connector F-18 (terminal 1) and ground.
Q: Is the wiring harness between driver's seat belt switch
connector F-18 (terminal 1) 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
functions, which are described in "CIRCUIT
OPERATION", work normally, the input signal from
the driver's seat belt switch should be normal.
AC204177
CONNECTOR : F-18
AD
HARNESS SIDE
2 1
F-18
ACX01670
2 1
AB
CONNECTOR F-18
(HARNESS SIDE)
AC204177
CONNECTOR : F-18
AD
HARNESS SIDE
2 1
F-18
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