Mitsubishi Grandis. Manual — part 291
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55-49
Step 6. Connector check: C-13 front blower
motor connector and C-105 A/C-ECU connector
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the connector.
Step 7. Voltage measurement at the C-13 front
blower motor controller connector.
(1) Disconnect the connector, and measure at the
wiring harness side.
AC310615
AF
Connector: C-13 <LHD>
Harness side
AC310628AF
Connector: C-13 <RHD>
Harness side
AC310613
AC
Connector: C-105 <LHD>
Harness side
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
AC310631AC
Connector: C-105 <RHD>
Harness side
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
AC310615
AF
Connector: C-13 <LHD>
Harness side
AC310628AF
Connector: C-13 <RHD>
Harness side
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55-50
(2) Turn the ignition switch to the ON position.
(3) Disconnect A/C-ECU connector C-105, and earth
terminal 45.
(4) measure the voltage between terminal 1 and
body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 14.
NO :
Go to Step 8.
Step 8. Voltage measurement at C-209 front
blower relay connector.
(1) Remove the relay, and measure at the junction
block side.
(2) Turn the ignition switch to the ON position.
(3) Voltage between terminal 3 and body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 10.
NO :
Go to Step 9.
AC310613
AC
Connector: C-105 <LHD>
Harness side
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
AC310631AC
Connector: C-105 <RHD>
Harness side
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
AC309471
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
AC309471
Connector C-105
(Harness side)
AD
AC310507
Connector C-13
(Harness side)
AO
AC310623
Connector: C-209 <LHD>
AD
3
4
5
1
2
Junction block side
Junction block (Front view)
AC310618
Connector: C-209 <RHD>
AD
3
4
5
1
2
Junction block side
Junction block (Front view)
AC310507AP
Connector C-209
(Junction block side)
3
4
5
1
2
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55-51
Step 9. Check the wiring harness between C-209
front blower relay connector terminal No.3 and
the ignition switch (IG2).
NOTE: Prior to the wiring harness inspection, check
junction block connector C-202, and repair if
necessary.
• Check the blower relay 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 10. Voltage measurement at C-209 front
blower relay connector.
(1) Remove the relay, and measure at the junction
block side.
(2) Turn the ignition switch to the ON position.
(3) Voltage between terminal 5 and body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 12.
NO :
Go to Step 11.
AC310624
Connectors: C-202, C-209 <LHD>
AC
3
4
5
1
2
Junction block side
Junction block (Front view)
C-209
C-202
C-209
Harness side
C-202
AC310619
Connectors: C-202, C-209 <RHD>
AC
3
4
5
1
2
Junction block side
Junction block (Front view)
C-209
C-202
C-209
Harness side
C-202
AC310623
Connector: C-209 <LHD>
AD
3
4
5
1
2
Junction block side
Junction block (Front view)
AC310618
Connector: C-209 <RHD>
AD
3
4
5
1
2
Junction block side
Junction block (Front view)
AC310507AQ
Connector C-209
(Junction block side)
3
4
5
1
2
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55-52
Step 11. Check the wiring harness between C-209
front blower relay connector terminal No.5 and
fusible link (30).
NOTE:
Prior to the wiring harness inspection, check
intermediate connectors C-125 and junction block
connector C-204, and repair if necessary.
• Check the blower relay 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.
AC310624
Connectors: C-204, C-209 <LHD>
AD
3
4
5
1
2
Junction block side
Junction block (Front view)
C-209
C-204 (B)
C-209
Harness side
C-204
AC310619
Connectors: C-204, C-209 <RHD>
AD
3
4
5
1
2
Junction block side
Junction block (Front view)
C-209
C-204 (B)
C-209
Harness side
C-204
AC310613
AD
Connector: C-125 <LHD>
AC310628AB
Connector: C-125 <RHD>
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