Mitsubishi Montero (2004+). Manual — part 780
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-377
STEP 7. Check the input signal by using "FUNCTION
DIAG." menu of the SWS monitor.
Check the input signals from the following switches:
• Ignition switch: ON
• Turn-signal light switch: RH
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) Connect the special tool. Refer to "How to connect SWS
monitor
.
(2) Operate scan tool MB991958 according to the procedure
below to display "TURN SIG.RH."
1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "FUNCTION DIAG."
5. Select "TURN SIGNAL."
6. Select "TURN SIG.RH."
(3) Check that normal conditions are displayed on the items
described in the table below.
Q: Are normal conditions displayed on the "T/S RH SW"
and "IG SW (IG1)"?
Normal conditions are displayed for all the items : Go to
Step 8.
Normal condition is not displayed on the "T/S RH SW" :
Normal condition is not displayed on the "T/S RH
SW": Refer to Inspection Procedure O-6
"ETACS-ECU does not receive any signal from the
turn-signal RH switch
Normal condition is not displayed on the "IG SW (IG1)" :
Refer to Inspection Procedure O-2 "ETACS-ECU
does not receive any signal from the ignition switch
(IG1)
ITEM NO.
ITEM NAME
NORMAL CONDITION
ITEM 10
T/S RH SW
ON
ITEM 30
IG SW (IG1)
ON
AC309091
MB991911
MB991827
MB991824
AB
MB991806
MB991862
DATA LINK
CONNECTOR
(16-PIN)
DATA LINK
CONNECTOR
(13-PIN)
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-378
STEP 8. Check the input signal by using "FUNCTION
DIAG." menu of the SWS monitor.
If the Ignition switch is turned to the "ON" position and the
turn-signal light switch (LH) is turned on, normal conditions
should be displayed on the items described in the table below.
Operate scan tool MB991958 according to the procedure below
to display "TURN SIG.LH."
1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "FUNCTION DIAG."
5. Select "TURN SIGNAL."
6. Select "TURN SIG.LH."
Q: Do the scan tool display the items "T/S LH SW" is
normal condition?
YES : Replace the ETACS-ECU. Verify that the turn-signal
lights illuminate normally.
NO : Refer to Inspection Procedure O-6 "ETACS-ECU
does not receive any signal from the taillight switch,
the headlight switch, the passing light switch, the
dimmer switch, the turn-signal light switch or switch
ITEM NO.
ITEM NAME
NORMAL
CONDITION
ITEM 11
T/S LH SW
ON
AC309091
MB991911
MB991827
MB991824
AB
MB991806
MB991862
DATA LINK
CONNECTOR
(16-PIN)
DATA LINK
CONNECTOR
(13-PIN)
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-379
INSPECTION PROCEDURE K-2: Flasher Timer: Hazard warning lights do not illuminate.
.
CIRCUIT OPERATION
If the ETACS-ECU receives "ON" signal from the
hazard warning light switch, the ETACS-ECU turns
on the flasher timer (incorporated in the
ETACS-ECU), thus causing the turn-signal lights to
flash.
.
TECHNICAL DESCRIPTION (COMMENT)
If the hazard warning lights do not flash, the power
supply line to the ETACS-ECU (dedicated to the
turn-signal lights) or the ETACS-ECU may be defec-
tive.
.
TROUBLESHOOTING HINTS
• The hazard warning light 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
Hazard Warning Light Circuit
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-380
• 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. Verify the turn-signal light operation.
Q: Do the turn-signal lights illuminate normally?
YES : Go to Step 2.
NO : Refer to Inspection Procedure K-1 "Turn-signal lights
does not flash when the turn-signal light switch is
turned on
."
STEP 2. Check the input signal (by using the pulse check
mode of the monitor.)
Check input signal from the hazard warning light switch.
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) Connect scan tool MB991502 to the data link connector
(16-pin).
(2) Operate scan tool MB991958 according to the procedure
below to display "PULSE CHECK."
1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "PULSE CHECK."
(3) Verify that scan tool MB991958 sounds when the hazard
warning light switch is turned from "OFF" to "ON."
Q: Does scan tool MB991958 sound when the hazard
warning light switch is turned from "OFF" to "ON"?
YES : Replace the ETACS-ECU. Verify that the hazard
warning lights illuminate normally.
NO : Refer to Inspection Procedure P-2 "ETACS-ECU does
not receive any signal from the hazard warning light
switch
."
AC307591 AB
MB991911
DATA LINK
CONNECTOR
MB991824
MB991827
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