Mitsubishi Grandis. Manual — part 105
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-417
COMMENTS ON TROUBLE SYMPTOM
Input signal from the ignition switch (ACC) is used to
operate the functions below. If the signal is abnormal,
these functions will not work normally.
• Seat belt warning buzzer function
• Door-ajar warning buzzer function
• Sunroof timer function
• Windshield wiper and washer
• Rear wiper and washer
• Headlamp washer
• Electric retractable remote controlled mirror
• Interior lamp automatic-shutdown function
POSSIBLE CAUSES
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
Ignition Switch (ACC) Input Circuit <RHD>
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet
ETACS-ECU
IGNITION
SWITCH (ACC)
J/B SIDE
RELAY
BOX
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-418
DIAGNOSTIC PROCEDURE
Step 1. Connector check: C-219 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the defective connector.
Step 2. Voltage measurement at the C-219
ETACS-ECU connector.
(1) Remove the ETACS-ECU, and measure at the
junction block side.
(2) Ignition switch: ACC position
(3) Voltage between C-219 ETACS-ECU connector
terminal No.18 and body earth
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Go to Step 3.
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>
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>
AC312731AB
Connector C-219
(Junction block side)
2019
7
13
17
18
1615 14
10
11
12
9 8
2
6 5
3
4
1
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-419
Step 3. Check the wiring harness between C-219
ETACS-ECU connector terminal No.18 and the
ignition switch (ACC).
NOTE:
Prior to the wiring harness inspection, check junction
block connector C-202, and repair if necessary.
• Check the power supply line 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 4. Retest the system.
Check that the ignition switch (ACC) 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.
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>
AC312035AB
Connector: C-202
Harness side
<LHD>
Junction block (Front view)
AC312045
AB
Connector: C-202
Junction block (Front view)
Harness side
<RHD>
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-420
Inspection Procedure Q-2: The ignition switch (IG1) signal is not received.
CAUTION
Whenever the ECU is replaced, ensure that the
input signal circuit is normal.
COMMENTS ON TROUBLE SYMPTOM
Input signal from the ignition switch (IG1) is used to
operate the functions below. If the signal is abnormal,
these functions will not work normally.
• Lamp reminder function
• Door-ajar warning buzzer function
• Turn-signal lamp operation sound function
• Power window
• Ignition key cylinder illumination lamp
• Seat belt indicator
• Head and tail lamps
• Headlamp automatic-shutdown function
• Rear fog lamp
• Turn signal lamp
• Interior lamps
• Interior lamp automatic-shutdown function
POSSIBLE CAUSES
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSTIC PROCEDURE
Step 1. Connector check: C-219 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the defective connector.
Ignition Switch (IG1) Input Circuit
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet
ETACS-ECU
IGNITION
SWITCH (IG1)
J/B SIDE
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>
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