Mitsubishi 380. Manual — part 98
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-389
STEP 11. Check the wiring harness between key reminder
switch connector C-310 (terminal 1) and ETACS-ECU
connector C-218 (terminal 63).
Q: Is the wiring harness between key reminder switch
connector C-310 (terminal 1) and ETACS-ECU connector
C-218 (terminal 63) 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. Verify that
the ignition key hole illumination lamp illuminates
normally.
INSPECTION PROCEDURE K-5: Interior Light: The interior lamp automatic shutoff function does not
work normally.
NOTE: This troubleshooting procedure requires the
use of diagnostic tool MB991958 and SWS monitor
kit MB991813. For details on how to use the SWS
monitor, refer to "How to connect SWS monitor
."
.
CIRCUIT OPERATION
The ETACS-ECU operates the interior lamp auto-
matic shutdown function according to the following
switch signals:
• Ignition switch (ACC)
• Ignition switch (IG1)
• Front door switch (LH)
• Door switches
• interior lamp loaded signal
.
TECHNICAL DESCRIPTION (COMMENT)
If the function does not work normally, the input cir-
cuit system from the switches or the ETACS-ECU
may be defective (refer to "CIRCUIT OPERATION").
.
TROUBLESHOOTING HINTS
• Refer to circuit diagrams GROUP-
• Refer to configuration diagrams GROUP-
• Trouble in input signal system
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
• The ETACS-ECU may be defective
54DB006A
CONNECTORS: C-218
JUNCTION BLOCK
(REAR VIEW)
C-218 (GR)
HARNESS SIDE
45
46
48 47
49
50
59
51
60
52
53
62
65
61
54
63
56
68
64
67 66
57
58
55
54DB004A
CONNECTOR: C-310
HARNESS SIDE
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-390
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991958: Diagnostic Tool (MUT-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: MUT-III USB Cable
• MB991910: MUT-III Main Harness A
• MB991813: SWS Monitor Kit
• MB991806: SWS Monitor Cartridge
• MB991812: SWS Monitor Harness (For Column-ECU)
• MB991822: Test Probe Harness
STEP 1. Check the interior lamps.
If the interior lamp switch is moved to the "door interlock posi-
tion", the interior lamps should illuminate when either door is
opened.
Q: Do the interior lamp illuminate normally?
All the interior lamps illuminate normally. : Go to Step 2.
None of the interior lamps illuminate normally. : Refer to
Inspection Procedure K-1 "The dome lamp do not
illuminate and go out normally
Some of the interior lamps do not illuminate normally. :
Refer to Inspection Procedure K-2 "The front dome
lamp, rear dome lamp or trunk lamp do not illuminate
or go out normally
STEP 2. Check the adjustment function.
Q: Has a setting other than "No auto-shutoff" been
selected for the interior lamp automatic shutdown
function by the adjustment function?
YES : Go to Step 3.
NO : Set the interior lamp automatic shutdown function to
another setting other than "No auto-shutoff".
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-391
STEP 3. Use diagnostic tool MB991958 to select "ECU
COMM Check" on the SWS monitor display.
Check the ETACS-ECU.
CAUTION
To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958. Connect special tool MB991910 before con-
necting special tool MB991812. Be sure to connect special
tool MB991806 after turning on special tool MB991824.
(1) Connect the special tool. Refer to "How to connect SWS
monitor
."
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Operate diagnostic tool MB991958 according to the
procedure below to display "ECU COMM Check."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "ECU COMM Check."
(4) Diagnostic tool MB991958 should show "OK" on the "ECU
COMM Check" menu for the "ETACS ECU" menu.
Q: Is "OK" displayed for the "ETACS ECU" menu?
YES : Go to Step4.
NO : Refer to Inspection Procedure A-3 "Communication
with the ETACS-ECU is not possible
."
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AC302210
COLUMN SWITCH
CONNECTOR
COLUMN SWITCH
CONNECTOR AT
HARNESS SIDE
MB991812
AB
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-392
STEP 4. Check the input signal by using "DATA LIST"
menu of the SWS monitor.
Check the input signals from the following switches:
• Ignition switch: OFF
• Driver’s or front passenger’s door: open
(1) Operate diagnostic tool MB991958 according to the
procedure below to display "ETACS ECU."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "Data List."
f.
Select "ETACS ECU."
(2) Check that normal conditions are displayed for the items
described in the table below.
Q: Does the diagnostic tool MB991958 display the items
"IG SW (IG1)", "IG SW (ACC)" and "FRONT DOOR SW"
as normal condition?
Normal conditions are displayed for all the items : Go to
Step 5.
Normal condition is not displayed for "IG SW (IG1)" :
Refer to Inspection Procedure M-2 "ETACS-ECU
does not receive any signal from the ignition switch
(IG1)
."
Normal condition is not displayed for "IG SW (ACC)" :
Refer to Inspection Procedure M-1 "ETACS-ECU
does not receive any signal from the ignition switch
(ACC)
Normal condition is not displayed for "FRONT DOOR
SW" : Refer to Inspection Procedure M-4 "ETACS-ECU
does not receive any signal from the front door
switches
."
ITEM NO.
ITEM NAME
NORMAL CONDITION
ITEM 30
IG SW (IG1)
OFF
ITEM 31
IG SW (ACC)
OFF
ITEM 32
FRONT DOOR SW
ON
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AC302210
COLUMN SWITCH
CONNECTOR
COLUMN SWITCH
CONNECTOR AT
HARNESS SIDE
MB991812
AB
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