Mitsubishi Montero (2004+). Manual — part 819
INPUT SIGNAL PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-533
INSPECTION PROCEDURE O-8: Column Switch: ETACS-ECU does not receive any signal from the
windshield intermittent wiper interval adjusting knob.
.
CIRCUIT OPERATION
The ETACS-ECU calculates the windshield intermit-
tent wiper interval according to the position of the
windshield intermittent wiper interval adjusting knob,
which is incorporated in column switch (windshield
wiper and washer switch).
.
TECHNICAL DESCRIPTION (COMMENT)
If the windshield intermittent wiper interval can not be
adjusted, the column switch or the ETACS-ECU may
be defective.
.
TROUBLESHOOTING HINTS
• The column switch (windshield wiper and washer
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
Windshield Intermittent Wiper Interval Adjusting Knob Input Circuit
AC204172
CONNECTOR : D-203
AG
AC204174
CONNECTOR : D-224
D-224(B)
AG
INPUT SIGNAL PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-534
• 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
STEP 1. Check the windshield intermittent wiper interval
adjusting knob.
(1) Remove the windshield wiper and washer switch, and
check at the switch side.
(2) Measure the resistance value between terminals 3 and 6.
The measured resistance should change smoothly from
approximately 0 ohm ("FAST" position) to 1 kiloohm
("SLOW" position).
Q: Is the windshield intermittent wiper interval adjusting
knob in good condition?
YES : Go to Step 2.
NO : Replace the column switch (windshield wiper and
washer switch). If the wiper interval can be adjusted
normally, it indicates that the windshield intermittent
wiper interval adjusting knob should send a signal to
the ECU.
STEP 2. Check the column switch body.
Remove the turn-signal light and lighting switch and windshield
wiper and washer switch. Then check continuity between the
switch body terminals.
Q: Is the column switch body in good condition?
YES : Go to Step 3.
NO : Replace the column switch body. If the wiper interval
can be adjusted normally, it indicates that the
windshield intermittent wiper interval adjusting knob
should send a signal to the ECU.
1
6
8
11
10
9
7
5
4
3
2
AC000417
SWITCH BODY
TESTER
CONNECTION
SPECIFIED
CONDITION
Lighting switch side
−
Windshield wiper and
washer switch side
3
− 3,
6
− 6
Less than 2 ohms
ACX00803
LIGHTING
SWITCH SIDE
WINDSHIELD
WIPER AND
WASHER
SWITCH SIDE
AC
INPUT SIGNAL PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-535
STEP 3. Check column switch connector D-203 and
ETACS-ECU connector D-224 for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Are column switch connector D-203 and ETACS-ECU
connector D-224 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 wiper interval can be adjusted
normally, it indicates that the windshield intermittent
wiper interval adjusting knob should send a signal to
the ECU.
STEP 4. Check the wiring harness between column switch
connector D-203 (terminal 6) and ETACS-ECU connector
D-224 (terminal 34).
Q: Is the wiring harness between column switch connector
D-203 (terminal 6) and ETACS-ECU connector D-224
(terminal 34) in good condition?
YES : Go to Step 5.
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 wiper
interval can be adjusted normally, it indicates that the
windshield intermittent wiper interval adjusting knob
should send a signal to the ECU.
AC204172
CONNECTOR : D-203
AC
HARNESS SIDE
1
2
3
7
8
6
5
10
4
9
D-203
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
AC204172
CONNECTOR : D-203
AC
HARNESS SIDE
1
2
3
7
8
6
5
10
4
9
D-203
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
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-536
STEP 5. Replace the ECU.
(1) Replace the ETACS-ECU.
(2) If the wiper interval can be adjusted normally, it indicates
that the windshield intermittent wiper interval adjusting knob
should send a signal to the ECU.
Q: Can input signal be confirmed when the windshield
intermittent wiper interval adjusting knob is operated?
YES : No action is necessary and testing is complete.
NO : Replace the column switch (windshield wiper and
washer switch). If the wiper interval can be adjusted
normally, it indicates that the windshield intermittent
wiper interval adjusting knob should send a signal to
the ECU.
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