Mitsubishi Grandis. Manual — part 317
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55-153
Step 1. Connector check: C-215 rear blower
motor connector
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the connector.
Step 2. Check the rear blower relay
Refer to
.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Replace the rear blower relay.
Step 3. Connector check: C-15 intermediate
connector
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the connector.
Step 4. Voltage measurement at C-15
intermediate connector.
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Turn the ignition switch to the ON position.
(3) Disconnect A/C-ECU connector C-104 and earth
terminal 56.
(4) Measure the voltage between terminal 1 and
AC310623
Connector: C-215 <LHD>
AH
Junction block side
Junction block (Front view)
AC310615
AD
Connector: C-15 <LHD>
AC310615
AD
Connector: C-15 <LHD>
AC310613
AK
Connector: C-104 <LHD>
Harness side
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
AC309471
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
AC309471AH
Connector C-104
(Harness side)
AC310507
Connector C-15
BE
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55-154
body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 11.
NO :
Go to Step 5.
Step 5. Voltage measurement at C-215 rear
blower relay connector.
(1) Remove the relay, and measure at the relay 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 7.
NO :
Go to Step 6.
Step 6. Check the wiring harness between C-215
rear blower relay connector terminal No.3 and
the ignition switch (IG2).
NOTE:
Prior to the wiring harness inspection, check junction
block connectors C-202, C-205 and joint connector
C-31, and repair if necessary.
• Check the rear 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.
AC310623
Connector: C-215 <LHD>
AH
Junction block side
Junction block (Front view)
AC310507BF
Connector C-215
(Junction block side)
AC310624
Connectors: C-202, C-205, C-215 <LHD>
AN
Junction block (Front view)
C-205
C-202
C-205
Harness side
C-202
Harness side
C-215
Junction block side
C-215
AC310613
AP
Connector: C-31 <LHD>
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55-155
Step 7. Voltage measurement at C-215 rear
blower relay connector.
(1) Remove the relay, and measure at the relay block
side.
(2) Turn the ignition switch to the "ON" position.
(3) Voltage between terminal 4 and body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 9.
NO :
Go to Step 8.
Step 8. Check the wiring harness between C-215
rear blower relay connector terminal No.4 and
the fusible link (30).
NOTE:
Prior to the wiring harness inspection, check
intermediate connector C-125 and junction block
connector C-201, and repair if necessary.
• Check the rear 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.
AC310623
Connector: C-215 <LHD>
AH
Junction block side
Junction block (Front view)
AC310507
Connector C-215
(Junction block side)
BG
AC310624
Connectors: C-201, C-215 <LHD>
AO
Junction block (Front view)
C-215
Harness side
C-201
C-201
Junction block side
C-215
AC310613
AD
Connector: C-125 <LHD>
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55-156
Step 9. Check the wiring harness between C-215
rear blower relay connector terminal No.2 and
C-104 A/C-ECU connector terminal No.56.
NOTE: Prior to the wiring harness inspection, check
junction block connector C-201, and repair if
necessary.
• Check the rear blower relay power supply line for
open circuit.
Q: Is the check result normal?
YES :
Go to Step 10.
NO :
Repair the wiring harness.
Step 10. Check the wiring harness between C-215
rear blower relay connector terminal No.4 and
C-15 intermediate connector terminal No.1.
NOTE: Prior to the wiring harness inspection, check
junction block connector C-201, and repair if
necessary.
• Check the rear 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.
AC310613
AK
Connector: C-104 <LHD>
Harness side
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
AC310624
Connectors: C-201, C-215 <LHD>
AO
Junction block (Front view)
C-215
Harness side
C-201
C-201
Junction block side
C-215
AC310615
AD
Connector: C-15 <LHD>
AC310624
Connectors: C-201, C-215 <LHD>
AO
Junction block (Front view)
C-215
Harness side
C-201
C-201
Junction block side
C-215
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