Mitsubishi Lancer Evolution 8. Manual — part 147
SWS – TROUBLESHOOTING
54B-111
Check connector C-224
Check connector C-210
Check the harness between the ETACS-ECU and the
ignition switch (ACC), and repair
Check connectors C-211, C-32
Check the harness between the ETACS-ECU and the
battery, and repair.
Check connector C-210
Check the harness between the ETACS-ECU and the
ignition switch (IG1), and repair
Confirm the trouble symptoms
Replace the ETACS-ECU
Transient problem
Measure at the ETACS-ECU C-224
• Detach the connector and measure at the junction box
side
• Ignition switch: ON
(1) Voltage between 20 & body earth
OK: Battery voltage
(2) Voltage between 8 & body earth
OK: Battery voltage
(3) Voltage between 4 & body earth
OK: Battery voltage
(4) Voltage between 18 & body earth
OK: Battery voltage
Inspection procedure R-19
Generic fuse No.17 load use signal not detected
Probable Cause
The generic fuse No.17 load signal is used to determine the
interior light cut-off function, and if there is a problem in this
signal, then the following functions will cease to work properly.
• Ignition key cylinder illumination light
• Interior light
• Fault in ETACS-ECU
• Fault in harness or connectors
OK
(3), (4) NG
OK
NG
Repair
NG
(1) NG
(2) NG
OK
OK
NG
NG
OK
OK
NG
Repair
Repair
Repair
SWS – TROUBLESHOOTING
54B-112
11. Chart of terminal voltages
11-1 ETACS-ECU
Note :
Terminals No. 1 to 20 cannot be measured as the ETACS-ECU is installed directly on the junction box, and they are listed for
reference.
Terminal
No.
Check Item
Check ConditionsNormal State
1
Electric window relay output
Electric windows operable
Battery voltage
2
Central door lock power supply (battery
voltage)
Any
Battery voltage
3
Earth (for ECU)
Any
0V
4
Ignition switch (ACC)
Ignition switch : ACC
Battery voltage
5
Interior light output
Interior lights switched on
2V or lower
6
Interior light power supply (battery
voltage)
Any (Interior light cut-off function not
operating)
Battery voltage
7
All door switch input
Any door switch : ON (door open)
0V
8
Ignition switch (IG1) power supply
Ignition switch : ON
Battery voltage
9
RH Turn indicator light output
RH Turn indicator light on
Battery voltage
10
Driver’s door switch input
Driver’s door switch : ON (door open)
0V
11
Hazard light power supply (battery
voltage)
Any
Battery voltage
12
Central door locking (lock) output
Door lock actuator operating (lock
operation)
Battery voltage
13
Central door locking (unlock) output
(except driver’s)
Door lock actuator operating (unlock
operation)
Battery voltage
14
LH Turn indicator light output
LH Turn indicator light on
Battery voltage
15
16
Rear wiper output
Rear wiper operating
Battery voltage
17
Rear wiper automatic stop signal input
Rear wiper operating
Battery voltage
18
Ignition switch (ACC) power supply
Ignition switch : ACC
Battery voltage
19
20
Battery voltage (for ECU)
Any
Battery voltage
21
22
Central door locking (unlock) output (for
driver’s door)
(Vehicle fitted with keyless entry)
Door lock actuator operating (unlock
operation)
Battery voltage
23
Rear washer output
Rear washer operating
Battery voltage
24
Motorised remote control mirror switch
(fold / return switch) input
Motorised remote control mirror
switch (fold / return) switch : ON
0V
25 – 29
30
Key reminder switch input
Key reminder switch : ON
(Ignition key removed)
0V
31
Motorised foldable door mirror output
Motorised foldable door mirrors
operating (fold operation)
Battery voltage
SWS – TROUBLESHOOTING
54B-113
Terminal
No.
Check Item
Check ConditionsNormal State
32 – 34
35
Driver’s door lock actuator (lock switch)
input
Driver’s door lock: when locked
0V
36
Driver’s door lock actuator (unlock switch)
input
Driver’s door lock: when unlocked
0V
37, 38
39
Reversing light switch input
Shift lever : R
Ignition switch : ON
Battery voltage
40
Motorised foldable door mirror output
Motorised foldable door mirror
operating (folding operation)
12V
41 – 43
44
Horn output
Alarm operating (horn output)
0V
Diagnosis being output(MUT-II/III
connection or diagnosis connector
No.1 earthed to body)
0 – 12V (pulse
signal)
51
Diagnosis output or input check signal
output
When input check is being output
0V, 12V
(changing input
signal)
52
53
Door ajar indicator light output
Door ajar indicator light switched on
0V
54
Fog light switch input
Fog light switch : ON
0V
55
Hazard light switch input
Hazard light switch : ON
0V
56
Earth (for sensor)
Any
0V
57,58
59
SWS communications line
Any
0 – 12V (pulse
signal)
60-62
63
Vehicle speed signal input
Vehicle travelling
0 – 12V (pulse
signal)
64, 65
66
Intermittent windscreen wiper volume
input
Ignition switch : ACC
Volume position : FAST
SLOW
0
2.5 V
67
Diagnosis control input
MUT-II/III connected
0V
68
SWS request signal output
Any
0 – 12V (pulse
signal)
69
Ignition key cylinder illumination light
output
Ignition key cylinder illumination
switched on
2V or lower
70
71
Interior light power supply
Any (Interior light cut-off function not
operating)
Battery voltage
72-74
SWS – TROUBLESHOOTING
54B-114
11-2 Column switch
11-3 Front ECU
Note : The front ECU is installed directly on the relay box, and cannot be measured. The terminals are listed here for
reference.
Terminal
No.
Check Item
Check ConditionsNormal State
1
Battery power supply
Any
Battery voltage
2
SWS request signal input
Any
0 – 12 V (pulse
signal)
3
SWS communications line
Any
0 – 12 V (pulse
signal)
4
Earth
Any
0V
5
6
Intermittent windscreen wiper volume
output
Ignition switch : ACC
Volume position : FAST
SLOW
0
2.5V
7
8
Windscreen wiper switch back-up output
Low speed windscreen wiper or High
speed windscreen wiper : ON
0V
9
Ignition switch (IG1) power supply
Ignition switch : ON
Battery voltage
10
Head light switch back-up output
Head light switch : ON
0V
Terminal
No.
Check Item
Check ConditionsNormal State
1
Fog light output
Fog lights switched on
2
Head light (high beam) output
Head lights (high beam) switched on
Battery voltage
3, 4
Battery power supply (for head light)
Any
Battery voltage
5
Battery power supply (for tail light)
Any
Battery voltage
6
Head light (low beam) output
Head lights (low beam) switched on
Battery voltage
7
Battery power supply (for ECU)
Any
Battery voltage
8
Tail light output
Tail lights switched on
Battery voltage
9 – 11
21
Windscreen washer output
Windscreen washer operating
Battery voltage
22
SWS communications line
Any
0 – 12V (pulse
signal)
23
Windscreen wiper automatic stop signal
input
Windscreen wiper operating
Battery voltage
24
Ignition switch (ACC) power supply
Ignition switch : ACC
Battery voltage
25
Head light switch back-up input
Head light switch : ON
0V
26
Windscreen wiper switch back-up input
Low-speed windscreen wiper switch
or high-speed windscreen wiper
switch : ON
0V
27
Windscreen wiper (LO speed) output
Windscreen wiper operating
(Low speed operation)
Battery voltage
28
Windscreen wiper (HI speed) output
Windscreen wiper operating
(High speed operation)
Battery voltage
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