Mitsubishi Lancer Evolution 7. Manual — part 397
SWS -
Troubleshooting
54B-33
Inspection Procedure K-1
When the ignition switch is in the LOCK (OFF) position,
no functions work normally.
Probable cause
Checking of the ETACS-ECU battery power supply circuit
system.
Probable cause
As a fault in this circuit disables ETACS-ECU functions when the ignition switch
is in the LOCK (OFF) position, any abnormality in this signal prevents the
following functions operating.
D
Lights left ON reminder warning function
D
Power window timer function
D
Headlamp automatic cut-off function
Or, the following functions operate when the ignition switch is in the ON position
only.
D
Diagnosis code reading and input signal check by MUT-II.
D
Central locking
D
Headlamps, tail lamps
D
Hazard lamps
D
Room lamps
D
ETACS-ECU fault
D
Harness or connector fault
NG
Repair
NG
Check the harness between ETACS-ECU and battery and
repair if necessary.
OK
Replace ETACS-ECU.
OK
Check the trouble
symptoms.
Measure at ETACS-ECU connector C-226.
D
Disconnect the connector and test on the junction box
side.
D
Voltage between terminal 20 and body earth.
OK : System voltage
NG
Check the following connectors:
C-226, C-209, C-05, C-135
SWS -
Troubleshooting
54B-34
CHECKS AT ECU TERMINALS
ETACS-ECU
*
Y0795AU
NOTE
*See the list below for data on the ETACS-ECU terminal 1 - 20 connectors. As the ETACS-ECU connects
directly onto the junction box, the voltages cannot be measured.
Terminal
No.
Check items
Checking requirements
Normal condition
1
Power window relay output
When power windows operating
normally
System voltage
2
Battery power supply (for central
locking)
Any time
System voltage
3
Earth (for ECU)
Any time
0 V
4
Ignition switch (ACC)
Ignition switch: ACC
System voltage
5
Room lamp output
When room lamps ON
2 V or below
6
-
-
-
7
Door switch input
When any one door switch ON (door
open)
0 V
8
Ignition switch (IG1) power supply
Ignition switch: ON
System voltage
9
Right-hand turn signal lamp output
When right-hand turn signal lamp ON
System voltage
10
Driver’s door switch input
When driver’s door switch ON (door
open)
0 V
11
Battery power supply (for hazard
lamps)
Any time
System voltage
12
Central locking (lock) output
When door lock actuator operating
(locking operation)
System voltage
13
Central locking (unlock) output (NOT
driver’s door)
When door lock actuator operating
(unlocking)
System voltage
14
Left-hand turn signal lamp output
When left-hand turn signal lamp ON
System voltage
15 - 17
-
-
-
18
Ignition switch (ACC) power supply
Ignition switch: ACC
System voltage
19
Battery power supply for interior lamp
When interior lamp ON
System voltage
20
Battery power supply (for ECU)
Any time
System voltage
21
Rear fog lamp switch input
When the rear fog lamp switch ON
0 V
22
Central locking (unlock) output (for
driver’s door)
When door lock actuator operating
(unlocking)
System voltage
23
-
-
-
24 - 32
-
-
-
33
Door lock key cylinder switch input
(unlock switch)
When driver’s door lock unlocked
0 V
34
Door lock key cylinder switch input
(lock switch)
When driver’s door lock locked
0 V
SWS -
Troubleshooting
54B-35
Terminal
No.
Normal condition
Checking requirements
Check items
35
Driver’s door lock actuator (locking
switch) input
When driver’s door lock locked
0 V
36
Driver’s door lock actuator (unlocking
switch) input
When driver’s door lock unlocked
0 V
37, 38
-
-
-
39
Back-up lamp switch input
When shift lever in reverse position
System voltage
40
-
-
-
51
Diagnosis output/input check signal
output
During diagnosis output (when MUT-II
connected or diagnosis connector No. 1
grounded on the body.)
0 - 12 V (pulse
signal)
When an input check is output
0, 12 V (at input
signal change)
52
Ignition switch (ACC) power supply
Ignition switch: ACC
System voltage
53, 54
-
-
-
55
Hazard warning lamp switch input
Hazard warning lamp switch: ON
0 V
56
Earth (for sensors)
Any time
0 V
57, 58
-
-
-
59
SWS communication line
Any time
0 - 12 V (pulse
signal)
60
-
-
-
61
Battery power supply
Any time
System voltage
62
-
-
-
63
Vehicle speed signal input
When vehicle driven
0 - 12 V (pulse
signal)
64 - 66
-
-
-
67
Diagnosis control input
When MUT-II connected
0 V
68
SWS request signal output
Any time
0 - 12 V (pulse
signal)
69
Ignition key cylinder illumination lamp
output
When ignition key cylinder illumination
lamp ON
2 V or below
70
-
-
-
71 - 73
-
-
-
74
Rear fog lamp output <Europe and
General Export-spec. models>
When rear fog lamps ON
System voltage
SWS -
Troubleshooting
54B-36
COLUMN SWITCHES
Terminal
No.
Check item
Checking requirements
Normal condition
1
Battery power supply
Any time
System voltage
2
SWS request signal input
Any time
0 - 12 V (pulse
signal)
3
SWS communication line
Any time
0 - 12 V (pulse
signal)
4
Earth
Any time
0 V
5 - 7
-
-
-
8
Windshield wiper switch backup
output
Windshield wiper low or high-speed
switch: ON
0 V
9
Ignition switch (IG1) power supply
Ignition switch: ON
System voltage
10
Headlamp switch backup output
Headlamp switch: ON
0 V
FRONT-ECU
NOTE
See the list below for data on the front-ECU terminals. As the front-ECU connects directly onto the relay
box, the voltages cannot be measured.
Terminal
No.
Check item
Checking requirements
Normal condition
1
-
-
-
2
Headlamp (high-beam) output
When headlamp (high-beam) ON
System voltage
3, 4
Battery power supply (for headlamps)
Any time
System voltage
5
Battery power supply (for tail lamps)
Any time
System voltage
6
Headlamp (low-beam) output
When headlamp (low-beam) ON
System voltage
7
Battery power supply (for ECU)
Any time
System voltage
8
Tail lamp output
When tail lamps ON
System voltage
9 - 11
-
-
-
21
Windshield washer output
When windshield washer operating
System voltage
22
SWS communication line
Any time
0 - 12 V (pulse
signal)
23
Windshield wiper automatic STOP
signal input
When windshield wiper operating
System voltage
24
Ignition switch (ACC) power supply
Ignition switch: ACC
System voltage
25
Headlamp switch backup input
Headlamp switch: ON
0 V
26
Windshield wiper switch backup input
Windshield wiper low or high-speed
switch: ON
0 V
27
Windshield wiper (low-speed) output
When windshield wiper operating (at
low-speed)
System voltage
28
Windshield wiper (high-speed) output
When windshield wiper operating (at
high-speed)
System voltage
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