Mitsubishi Grandis. Manual — part 596
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54D-482
diagnose by using the MUT-III.
(2) Check that the MUT-III indications correspond to
the illustration.
Q: Is the check result normal?
YES :
<MUT-III indications correspond to the
illustration> Go to Step 10 .
NO :
<MUT-III indications do not correspond to
the illustration> Go to Step 11 .
STEP 10. Resistance measurement at C-09 joint
connector (CAN2) and C-106 A/C-ECU connector.
CAUTION
A digital multimeter should be used. For details
refer to
CAUTION
The test wiring harness should be used. For
details refer to
(1) Disconnect the joint connector (CAN2) and the
A/C-ECU connector, and measure at the wiring
harness side.
(2) Ignition switch: OFF (LOCK)
CAUTION
When measuring the resistance, disconnect the
negative battery terminal. For details refer to
(3) Ensure that the negative battery terminal is
disconnected.
(4) Continuity between C-09 joint connector (CAN2)
terminal No.2 and C-106 A/C-ECU connector
AC309834
MUT
J/C (2)
METER
ETAC S
J/C (1)
ASC -ECU
ENG/AT-ECU
A/C -ECU
SRS-ECU
STR. A .
SNSR
C. DISPL AY
AO
: Red section
on screen
AC310615
AU
Harness side
Connector: C-09 <LHD>
C-09 (GR)
AC310613
AB
Connector: C-106 <LHD>
Harness side
AC312553
Harness side: C-106
Test
harness
BA
Harness side: C-09
Test
harness
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54D-483
terminal No.8
OK: 2
Ω or less
(5) Continuity between C-09 joint connector (CAN2)
terminal No.13 and C-106 A/C-ECU connector
terminal No.9
OK: 2
Ω or less
CAUTION
Strictly observe the specified wiring harness
repair procedure. For details refer to
Q: Are the check results normal?
YES :
<All the resistances measure 2
Ω or less>
Power supply to the A/C-ECU may be
suspected. Diagnose the air conditioner
system. Refer to
NO :
<Either or all of the resistances measure
more than 2
Ω> Repair the wiring harness
between the joint connector (CAN2) and the
A/C-ECU connector.
STEP 11. Connector check: C-221 ETACS-ECU
connector
CAUTION
The strand end of the twist wire should be within
10 cm from the connector. For details refer to
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Repair the defective connector.
STEP 12. MUT-III CAN bus diagnostics (C-221
ETACS-ECU connector disconnected)
(1) Disconnect the ETACS-ECU connector, and
diagnose by using the MUT-III.
(2) Check that the MUT-III indications correspond to
the illustration.
Q: Is the check result normal?
AC312553
Harness side: C-106
Test
harness
BC
Harness side: C-09
Test
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)
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)
AC309834
MUT
J/C (2)
METER
ETAC S
J/C (1)
ASC -ECU
ENG/AT-ECU
A/C -ECU
SRS-ECU
STR. A .
SNSR
C. DISPL AY
AL
: Red section
on screen
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54D-484
YES :
<MUT-III indications correspond to the
illustration> Go to Step 13 .
NO :
<MUT-III indications do not correspond to
the illustration> Go to Step 14 .
STEP 13. Resistance measurement at C-09 joint
connector (CAN2) and C-221 ETACS-ECU
connector.
CAUTION
A digital multimeter should be used. For details
refer to
CAUTION
The test wiring harness should be used. For
details refer to
(1) Disconnect the joint connector (CAN2) and the
ETACS-ECU connector, and measure at the
wiring harness side.
(2) Ignition switch: OFF (LOCK)
CAUTION
When measuring the resistance, disconnect the
negative battery terminal. For details refer to
(3) Ensure that the negative battery terminal is
disconnected.
(4) Continuity between C-09 joint connector (CAN2)
terminal No.3 and C-221 ETACS-ECU connector
terminal No.72
OK: 2
Ω or less
(5) Continuity between C-09 joint connector (CAN2)
terminal No.14 and C-221 ETACS-ECU
AC310615
AU
Harness side
Connector: C-09 <LHD>
C-09 (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)
AC312553 BE
Harness side: C-09
Test
harness
Harness side: C-221
Test
harness
AC312553 BG
Harness side: C-09
Harness side: C-221
Test
harness
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54D-485
connector terminal No.73
OK: 2
Ω or less
CAUTION
Strictly observe the specified wiring harness
repair procedure. For details refer to
Q: Are the check results normal?
YES :
<All the resistances measure 2
Ω or less>
Power supply to the ETACS-ECU may be
suspected. Diagnose the SWS. Refer to
NO :
<Either or all of the resistances measure
more than 2
Ω> Repair the wiring harness
between the joint connector (CAN2) and the
ETACS-ECU connector.
STEP 14. Connector check: C-07 centre display
connector
CAUTION
The strand end of the twist wire should be within
10 cm from the connector. For details refer to
Q: Is the check result normal?
YES :
Go to Step 15 .
NO :
Repair the defective connector.
STEP 15. MUT-III CAN bus diagnostics (C-07
centre display connector disconnected)
(1) Disconnect the centre display connector, and
diagnose by using the MUT-III.
(2) Check that the MUT-III indications correspond to
the illustration.
Q: Is the check result normal?
YES :
<MUT-III indications correspond to the
illustration> Go to Step 16 .
NO :
<MUT-III indications do not correspond to
the illustration> Go to Step 27 .
STEP 16. Connector check: C-37 jumper
connector
CAUTION
The strand end of the twist wire should be within
10 cm from the connector. For details refer to
Check that the wiring harness of the jumper
connector is not damaged.
Q: Is the check result normal?
YES :
Go to Step 17 .
NO :
Repair the defective connector.
AC310613
BC
Connector: C-07 <LHD>
Harness side
C-07 (B)
AC310613
BC
Connector: C-07 <LHD>
Harness side
C-07 (B)
AC309834
MUT
J/C (2)
METER
ETAC S
J/C (1)
ASC -ECU
ENG/AT-ECU
A/C -ECU
SRS-ECU
STR. A .
SNSR
C. DISPL AY
AP
: Red section
on screen
AC310615
AV
Connector: C-37 <LHD>
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