Mitsubishi Grandis. Manual — part 133
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-529
Inspection Procedure Q-25: The vehicle speed signal is not received.
CAUTION
Whenever the ECU is replaced, ensure that the
input signal circuit is normal.
COMMENTS ON TROUBLE SYMPTOM
The vehicle speed signal is used to operate the
functions below. If the signal is abnormal, these
functions will not work normally.
• Windshield wiper and washer (vehicle
speed-dependent wiper function)
• Seat belt warning buzzer function
• Door ajar warning buzzer function
• Seat belt indicator
• Door ajar indicator
POSSIBLE CAUSES
• The CAN bus line is defective.
• Malfunction of the vehicles speed sensor
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSTIC PROCEDURE
Step 1. MUT-III CAN bus diagnostics
Use the MUT-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the CAN bus line (Refer to GROUP
54D
− Diagnosis
Step 2. MUT-III diagnosis code
Check whether the combination meter-related
diagnosis code is set.
Q: Is the diagnosis code set?
YES :
Diagnose the combination meter (Refer to
GROUP 54A
− Combination meter
NO :
Go to Step 3.
Step 3. Pulse check
OK: The MUT-III sounds or the voltmeter
needle fluctuates.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
Cope with Intermittent Malfunction
NO :
Go to Step 4.
Step 4. Retest the system.
Check that the vehicle speed signal is received
normally.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
Cope with Intermittent Malfunction
NO :
Replace the ETACS-ECU.
Speed Signal Input Circuit
ETACS-
ECU
SPEED SIGNAL
COMBINATION
METER
CAN COMMUNICATION LINE
(CAN_L LINE)
CAN COMMUNICATION LINE
(CAN_H LINE)
INPUT SIGNAL
System switch
Check condition
Vehicle speed
signal
When the vehicle speed has
reached 10 km/h or more
CHECK AT ECU TERMINAL
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-530
CHECK AT ECU TERMINAL
M1549001200812
ETACS-ECU
NOTE: Terminal numbers 1 to 20 can not be measured as the ETACS-ECU is mounted on the junction block
directly. The values are for reference only.
18
2019
7
1716
14
15
13
10
11
12
8
9
4
6 5
3 2 1
AC312902 AB
C-219
C-220
C-221
Termin
al No.
Check item
Check condition
Normal condition
1
Output to the power window relay
When the power windows are
operative
System voltage
2
Power supply to the central door
locking system (battery positive
voltage)
Always
System voltage
3
Earth (for ECU)
Always
0 V
4
Ignition switch (ACC)
Ignition switch: ACC
System voltage
5
Output to room lamp
When the room lamp is on
2 V or less
6
Power supply to interior lamp
(battery positive voltage)
Always (when the interior lamp off
function is off)
System voltage
7
Input from left rear door switch
Left rear door switches: ON (left
rear door open)
0 V
8
Power supply from ignition switch
(IG1)
Ignition switch: ON
System voltage
9
Output to right turn-signal lamps
When right turn-signal lamps are on System voltage
10
Input from driver's door switch
Driver's door switch: ON (door
open)
0 V
11
Power supply to hazard warning
lamp (battery positive voltage)
Always
System voltage
12
Output to central door locking (for
locking the doors)
When the door lock actuators lock
the doors
System voltage
13
Output to central door locking (for
unlocking the doors other than the
driver's door)
When the door lock actuators
unlock the doors
System voltage
14
Output to left turn-signal lamps
When the left turn-signal lamps are
on
System voltage
15
−
−
−
16
Output to rear wiper
When rear wiper is operating
System voltage
17
Input of rear wiper automatic stop
signal
When rear wiper is operating
System voltage
18
Power supply from ignition switch
(ACC)
Ignition switch: ACC
System voltage
CHECK AT ECU TERMINAL
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-531
19
−
−
−
20
Battery power supply (for ECU)
Always
System voltage
21
Input from rear fog lamp switch
Rear fog lamp switch: ON
0 V
22
Output to central door locking (for
unlocking the driver's door)
When the door lock actuators
unlock the doors
System voltage
23
Rear washer output
When rear washer is operating
System voltage
24
Input from remote controlled mirror
switch (fold switch)
Remote controlled mirror switch
(fold switch): ON
0 V
29
Input from passenger’s seat belt
switch
When passenger’s seat belt switch
is on
−
30
Input to key reminder switch
Key reminder switch: ON (ignition
key removed)
0 V
31
Output to electric retractable remote
controlled mirror (unfold)
When the door mirrors are folding
System voltage
33
Input to door key switch or tailgate
key switch (lock switch)
All doors and tailgate: Locked
0 V
34
Input to door key switch or tailgate
key switch (unlock switch)
All doors and tailgate: Unlocked
0 V
35
Input to driver's door lock actuator
(lock switch)
Driver's door lock: Locked
0 V
36
Input to driver's door lock actuator
(unlock switch)
Driver's door lock: Unlocked
0 V
37
Input from tailgate switch
Tailgate switch: ON (tailgate open)
0 V
39
Input to back-up lamp switch
Sift lever: R position
Ignition switch: ON
System voltage
40
Output to electric retractable remote
controlled mirror (unfold)
When the door mirrors are
unfolding
System voltage
51
Setting diagnosis code or sending
input check signal
When diagnosis code is set (the
MUT-II/III is connected or the
diagnosis connector No.1 is
earthed)
0 to 12 V (pulse signal)
When input check signal is sent
0 V, 12 V (input signal
is fluctuating)
52
Input from luggage room lamp
switch
Luggage room lamp switch: ON
0 V
53
Input from interior lamp off switch
Interior lamp switch: OFF
0 V
54
Input from front fog lamp switch
Front fog lamp switch: ON
0 V
55
Input from hazard warning lamp
switch
Hazard warning lamp switch: ON
0 V
56
Earth (for sensor)
Always
0 V
57, 58
−
−
−
59
SWS communication line
Always
0 to 12 V (pulse signal)
Termin
al No.
Check item
Check condition
Normal condition
CHECK AT ECU TERMINAL
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-532
COLUMN SWITCH
60
Power supply to automatic air
conditioner control (A/C-ECU)
illumination and radio illumination
(battery positive voltage)
Always
System voltage
61
Input to tailgate lock actuator
Tailgate lock: Locked
0 V
62
Input to tailgate lock release handle Tailgate lock release handle: ON
0 V
63
Input from interior lamp on switch
Interior lamp switch: ON
0 V
64
Earth (for daytime running lamp
function)
Always
0 V
65
Input from passenger's door switch Passenger's door switch: ON (door
open)
0 V
66
Input from windshield intermittent
wiper volume
Turn the ignition switch to the ACC
position, and move the wiper
volume from "Fast" to "Slow."
0 to 2.5 V
67
Input from diagnosis control
When MUT-III is connected
0 V
68
Input of SWS request signal
Always
0 to 12 V (pulse signal)
69
Output to ignition key cylinder
illumination lamp
When ignition key cylinder
illumination is on
2 V or less
70
Input from right rear door switch
Right rear door switches: ON (right
rear door open)
0 V
71
Power supply to interior lamp
Always (when the interior lamp off
function is off)
System voltage
72
−
−
−
73
−
−
−
74
Output to rear fog lamp
When rear fog lamp is on
System voltage
Termin
al No.
Check item
Check condition
Normal condition
AC312903 AB
C-301
Termin
al No.
Check item
Check condition
Normal condition
1
System voltage
Always
System voltage
2
Input of SWS request signal
Always
0 to 12 V (pulse signal)
3
SWS communication line
Always
0 to 12 V (pulse signal)
4
Earth
Always
0 V
5
−
−
−
6
Output to windshield intermittent
wiper volume
Ignition switch: ACC
Move the wiper volume from "Fast"
to "Slow."
0 to 2.5 V
7
−
−
−
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