Mitsubishi Grandis. Manual — part 276
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-566
Step 6. Check the wiring harness between C-219
ETACS-ECU connector terminal No.4 and the
ignition switch (ACC).
NOTE:
AC312037
Connector: C-219
Junction block (Rear view)
Junction block side
AB
3
1
2
14
4
5
7 6
8
1110 9
1312
17
15
16
18
19
20
<LHD>
AC312047
Connector: C-219
Junction block (Rear view)
Junction block side
AB
3
1
2
14
4
5
7 6
8
1110 9
1312
17
15
16
18
19
20
<RHD>
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-567
Prior to the wiring harness inspection, check joint
connector C-32 <LH drive vehicles>, C-01 <RH drive
vehicles> junction block connector C-203 or
intermediate connector C-125, and repair if
necessary.
• Check the power supply line to the ignition switch
(ACC) for open circuit.
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 :
Repair the wiring harness.
Step 7. Pulse check
Check the input of the interior lamp loaded signal.
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 :
Replace the ETACS-ECU.
AC312043AC
Connector: C-01<RHD>
AC310613
AG
Connector: C-32 <LHD>
AC312035AD
Connector: C-203 <LHD>
Junction block (Front view)
Harness side
10
1
6
14
5
12
13
4
11
7
2
3
8
9
AC312045
AD
Connector: C-203 <RHD>
Harness side
Junction block (Front view)
10
1
6
14
5
12
13
4
11
7
2
3
8
9
AC312031
AJ
Connector: C-125 <LHD>
38
1213
11
26
14
1
20
6
232425
37
31
36
30
10
9
2122
35
8
7
34
17
29
1819
5
4
1516
33
28
32
27
3
2
System switch
Check condition
Interior lamp
loaded signal
When a load is applied through
multi-purpose fuse No.18
AC312041AD
Connector: C-125 <RHD>
38
1213
11
26
14
1
20
6
232425
37
31
36
30
10
9
2122
35
8
7
34
17
29
1819
5
4
1516
33
28
32
27
3
2
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-568
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 lamp
• Door ajar indicator lamp
POSSIBLE CAUSES
• 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. Check for combination meter 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. ETACS ANALOG data by using the SWS
monitor.
• Enter a simulated vehicle speed.
OK: Normal condition is displayed.
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
Item No.
Item name
Normal
conditions
Item 03
SPEED SENSOR
Displays the speed
which fluctuates
within
± 2 km/h
from the entered
vehicle speed.
CHECK AT ECU TERMINAL
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-569
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
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