Mitsubishi Grandis. Manual — part 148
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-54
Step 3. Connector check: C-221 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the defective connector.
Step 4. Resistance measurement at the C-221
ETACS-ECU connector.
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Resistance between C-221 ETACS-ECU
connector terminal No.56 and body earth
OK: 2
Ω or less
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Go to Step 5.
Step 5. Check the wiring harness between C-221
ETACS-ECU connector terminal No.56 and body
earth.
• Check the earth wires for open circuit.
Q: Are the check results normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
Cope with Intermittent Malfunction
NO :
Repair the wiring harness.
AC310626
Connector: C-221
Junction block (Rear view)
<LHD>
AC
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
Harness side
C-221(GR)
AC310620
Connector: C-221
Junction block
(Rear view)
<RHD>
AC
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
Harness side
C-221(GR)
AC310626
Connector: C-221
Junction block (Rear view)
<LHD>
AC
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
Harness side
C-221(GR)
AC310620
Connector: C-221
Junction block
(Rear view)
<RHD>
AC
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
Harness side
C-221(GR)
AC310506
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
AC310506DB
Connector C-221
(Harness side)
AC310626
Connector: C-221
Junction block (Rear view)
<LHD>
AC
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
Harness side
C-221(GR)
AC310620
Connector: C-221
Junction block
(Rear view)
<RHD>
AC
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
Harness side
C-221(GR)
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-55
Step 6. Connector check: C-126 diagnosis
connector
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the defective connector.
Step 7. Check the wiring harness from C-221
ETACS-ECU connector terminal Nos.51 and 67 to
C-126 diagnosis connector terminal Nos.9 and 1.
• Check the communication lines for open circuit.
Q: Are the check results normal?
YES :
Replace the ETACS-ECU.
NO :
Repair the wiring harness.
AC310613
AO
Connector: C-126 <LHD>
Harness side
(Front side)
C-126 (B)
AC310631AK
Connector: C-126 <RHD>
C-126 (B)
Harness side
(Front side)
AC310613
AO
Connector: C-126 <LHD>
Harness side
(Front side)
C-126 (B)
AC310631AK
Connector: C-126 <RHD>
C-126 (B)
Harness side
(Front side)
AC310626
Connector: C-221
Junction block (Rear view)
<LHD>
AC
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
Harness side
C-221(GR)
AC310620
Connector: C-221
Junction block
(Rear view)
<RHD>
AC
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
Harness side
C-221(GR)
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-56
Inspection Procedure A-2: Communication with the column switch (column-ECU) is not possible.
CAUTION
Whenever the ECU is replaced, ensure that the
power supply circuit, the earthing circuit and the
communication circuit are normal.
FUSIBLE
LINK
26
IGNITION
SWITCH (IG1)
RELAY
BOX
COLUMN
SWITCH
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
COLUMN-ECU
ETACS-ECU
DIAGNOSIS
CONNECTOR
FRONT SIDE
Column Switch Power Supply and SWS Communication Circuit <LHD>
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-57
COMMENTS ON TROUBLE SYMPTOM
The power supply circuit to the column switch
(column-ECU) may be defective. If the wiring
harness of the battery power supply circuit for the
ECU (column switch terminal No.1) is defective, also
check the power supply circuit to the ignition switch
(IG1) (column switch terminal No.9) and repair if
necessary.
TROUBLESHOOTING HINTS
• Malfunction of the ETACS-ECU
• Malfunction of the column switch
• Damaged harness wires and connectors
FUSIBLE
LINK
26
IGNITION
SWITCH (IG1)
RELAY
BOX
COLUMN
SWITCH
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
COLUMN-ECU
ETACS-ECU
DIAGNOSIS
CONNECTOR
FRONT SIDE
Column Switch Power Supply and SWS Communication Circuit <RHD>
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