Mitsubishi 380. Manual — part 109
INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-433
STEP 2. Check the key reminder switch.
Disconnect key reminder switch connector C-310. Then check
continuity between terminals.
Q: Is the key reminder switch in good condition?
YES : Go to Step 3.
NO : Replace the key reminder switch. If the functions
described in "CIRCUIT OPERATION" work normally,
the input signal from the key reminder switch should
be normal.
STEP 3. Check the ground circuit to the key reminder
switch. Measure the resistance at key reminder switch
connector C-310.
(1) Disconnect key reminder switch connector C-310 and
measure the resistance available at the wiring harness side
of the connector.
(2) Measure the resistance value between terminal 4 and
ground.
• The resistance should be 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES : Go to Step 5.
NO : Go to Step 4.
IGNITION KEY
TESTER
CONNECTION
SPECIFIED
CONDITION
Removed
4
− 6
Open circuit
Inserted
4
− 6
Less than 2 ohms
54DB004A
CONNECTOR: C-310
HARNESS SIDE
54DB004A
CONNECTOR: C-310
HARNESS SIDE
AC209364GZ
CONNECTOR C-310
(HARNESS SIDE)
INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-434
STEP 4. Check the wiring harness between key reminder
switch connector C-310 (terminal 4) and ground.
Q: Is the wiring harness between key reminder switch
connector C-310 (terminal 4) 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 described in "CIRCUIT OPERATION" work
normally, the input signal from the key reminder
switch should be normal.
STEP 5. Check ETACS-ECU connector C-217 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector C-217 in good condition?
YES : Go to Step 6.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. If the functions described in "CIRCUIT
OPERATION" work normally, the input signal from the
key reminder switch should be normal.
54DB004A
CONNECTOR: C-310
HARNESS SIDE
16DB307A
CONNECTOR: C-217
HARNESS SIDE
25
26
27
28
29
21
22
23
24
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
JUNCTION BLOCK
(REAR VIEW)
INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-435
STEP 6. Check the wiring harness between key reminder
switch connector C-310 (terminal 6) and ETACS-ECU
connector C-217 (terminal 30).
Q: Is the wiring harness between key reminder switch
connector C-310 (terminal 6) and ETACS-ECU connector
C-217 (terminal 30) in good condition?
YES : Go to Step 7.
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 described in "CIRCUIT OPERATION" work
normally, the input signal from the key reminder
switch should be normal.
STEP 7. Check for continuity between key reminder switch
connector C-310 terminal 4 and each of the other terminals
as well as terminal 6 and each of the other terminals.
(1) Disconnect key reminder switch connector C-310 and
measure the resistance available at the equipment side of
the connector.
(2) Check for continuity between key reminder switch
connector C-310 terminal 4 and each of the other terminals
as well as terminal 6 and each of the other terminals.
Q: Does continuity exist between the terminals?
NO : Replace the ETACS-ECU. If the functions described
in "CIRCUIT OPERATION" work normally, the input
signal from the key reminder switch should be normal.
YES : Replace the key reminder switch. If the functions
described in "CIRCUIT OPERATION" work normally,
the input signal from the key reminder switch should
be normal.
16DB307A
CONNECTOR: C-217
HARNESS SIDE
25
26
27
28
29
21
22
23
24
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
JUNCTION BLOCK
(REAR VIEW)
54DB004A
CONNECTOR: C-310
HARNESS SIDE
16DB307A
CONNECTOR: C-217
HARNESS SIDE
25
26
27
28
29
21
22
23
24
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
JUNCTION BLOCK
(REAR VIEW)
INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-436
INSPECTION PROCEDURE N-2: ETACS-ECU does not receive any signal from the hazard warning
lamp switch.
.
CIRCUIT OPERATION
The ETACS-ECU operates the following functions or
systems according to signal from the hazard warning
lamp switch:
• Turn-signal lamp buzzer
• Hazard warning lamp
• Keyless entry system (registering the encrypted
code)
.
TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the equipment or systems
described in "CIRCUIT OPERATION" do not work
normally.
.
TROUBLESHOOTING HINTS
• Refer to circuit diagrams GROUP-
• Refer to configuration diagrams GROUP-
• The hazard warning lamp switch may be defec-
tive
• 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
DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
STEP 1. Check hazard warning lamp switch connector
C-08 for loose, corroded or damaged terminals, or
terminals pushed back in the connector.
Q: Is hazard warning lamp switch connector C-08 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 equipment described in "CIRCUIT
OPERATION" work normally, the input signal from the
hazard warning lamp switch should be normal.
16DB463A
CONNECTOR: C-08
HARNESS SIDE
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
16DB463A
CONNECTOR: C-08
HARNESS SIDE
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