Mitsubishi 380. Manual — part 97
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-385
STEP 3. Check the input signal (by using the pulse check
mode of the monitor).
Check the following switches and input signals:
• Key reminder switch
• Interior lamp loaded signal
(1) Operate diagnostic tool MB991958 according to the
procedure below to display "Pulse check."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "Pulse Checking."
(2) When the switches (see table below), which are applicable
for the input signal check, are operated, check if diagnostic
tool MB991958 sounds or not.
Q: When the key reminder switch and the interior lamp are
operated, does diagnostic tool MB991958 sound in each
case?
Buzzer of diagnostic tool MB991958 sounds normally. :
Go to Step 4.
When the ignition key is removed and reinserted,
diagnostic tool MB991958 does not sound : Refer to
Inspection Procedure N-1 "ETACS-ECU does not
receive any signal from the key reminder switch
."
When one of the interior lamps is illuminated,
diagnostic tool MB991958 does not sound : Refer to
Inspection Procedure N-9 "ETACS-ECU does not
receive any interior lamp loaded signal
."
STEP 4. Check ETACS-ECU connector C-218 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector C-218 in good condition?
YES : Go to Step 5.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. Verify that the ignition key hole illumination
lamp illuminates normally.
ITEM NAME
CONDITION
key reminder switch
Remove and reinsert the
ignition key
interior lamp loaded signal
Turn on one of the interior
lamps
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
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
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-386
STEP 5. Check at ETACS-ECU connector C-218 in order to
check the ignition key hole illumination lamp circuit.
(1) Disconnect ETACS-ECU connector C-218, and measure at
the wiring harness side.
(2) The ignition key hole illumination lamp should illuminate
when terminal 63 is grounded.
Q: Does the ignition key hole illumination lamp illuminate?
YES : Replace the ETACS-ECU. Verify that the ignition key
hole illumination lamp illuminates normally.
NO : Go to Step 6.
STEP 6. Check key reminder switch connector C-310 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is key reminder switch connector C-310 in good
condition?
YES : Go to Step 7.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. Verify that the ignition key hole illumination
lamp illuminates normally.
STEP 7. Check the ignition key hole illumination lamp
bulb.
Q: Is the ignition key hole illumination lamp bulb in good
condition?
YES : Go to Step 8.
NO : Replace the bulb. Verify that the ignition key hole
illumination lamp illuminates normally.
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
16DB456A
CONNECTOR C-218
(HARNESS SIDE)
54DB004A
CONNECTOR: C-310
HARNESS SIDE
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-387
STEP 8. Check the key reminder switch (ignition key hole
illumination).
(1) Disconnect key reminder switch connector C-310.
(2) Remove the ignition key hole illumination lamp bulb. Then
measure the resistance value between the bulb terminals.
(3) Install a bulb to the key remainder switch, and measure the
resistance between connector C-310 terminals 1 and 2. The
measured resistance value should be roughly the same as
the value measured in Step (2).
Q: Are these two resistance values extremely different?
YES : Replace the key reminder switch. Verify that the
ignition key hole illumination lamp illuminates
normally.
NO : <Nearly equal> Go to Step 9.
STEP 9. Check the battery power supply circuit to the key
reminder switch circuit. Measure the voltage at key
reminder switch connector C-310.
(1) Disconnect key reminder switch connector C-310, and
measure the voltage available at the wiring harness side of
the connector.
(2) Measure the voltage between terminal 2 and ground.
• The voltage should measure approximately 12 volts
(battery positive voltage).
Q: Is the measured voltage approximately 12 volts (battery
positive voltage)?
YES : Go to Step 11.
NO : Go to Step 10.
54DB004A
CONNECTOR: C-310
HARNESS SIDE
54DB004A
CONNECTOR: C-310
HARNESS SIDE
AC209364
CONNECTOR C-310
(HARNESS SIDE)
GY
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-388
STEP 10. Check the wiring harness between key reminder
switch connector C-310 (terminal 2) and battery.
NOTE: Also check intermediate connector C-29 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector C-29 is damaged, repair or
replace the connector as described in GROUP 00E, Harness
Connector Inspection
.
Q: Is the wiring harness between key reminder switch
connector C-310 (terminal 2) and battery 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.
54DB004A
CONNECTOR: C-310
HARNESS SIDE
25DB113A
CONNECTOR: C-29
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