Mitsubishi Colt Ralliart. Manual — part 527
![](/vehicles/winoney/ama/flend/noshot.png)
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55A-16
DIAGNOSIS PROCEDURE
Step 1. Check that the blower motor operates
when the blower switch is moved to the "4 (HI) "
position.
(1) Turn the ignition switch to the "ON" position.
(2) Turn the blower switch to the "4 (HI) " position.
Q: Does the blower motor operate when the blower
switch is moved to the "4 (HI) " position?
YES :
Refer to Inspection procedure 5 "The blower
air volume cannot be changed
NO :
Go to Step 2.
Step 2. Connector check: B-10 blower motor
connector
AC401055
Connector: B-10
AL
Harness side
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the connector.
Step 3. Resistance measurement at the B-10
blower motor connector.
AC401055
Connector: B-10
AL
Harness side
(1) Disconnect the connector, and measure at the
wiring harness side.
AC310506DU
Connector B-10
(Harness side)
(2) Measure the resistance between terminal 2 and
body earth.
OK: 2 ohms or less
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Go to Step 4.
Step 4. Check the wiring harness between B-10
blower motor connector terminal No.2 and body
earth.
AC401055
Connector: B-10
AL
Harness side
• Check the blower motor earth line for open cir-
cuit.
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.
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/xit.png)
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55A-17
Step 5. Voltage measurement at B-10 blower
motor connector.
AC401055
Connector: B-10
AL
Harness side
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Turn the blower switch to the "4 (HI) " position.
AC310507 EU
Connector B-10
(Harness side)
(4) Measure the voltage between terminal 1 and
body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 18.
NO :
Go to Step 6.
Step 6. Connector check: B-116 blower relay
connector
AC313824
Connector: B-116
AD
Junction block side
Junction block (Front view)
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the connector.
Step 7. Check the blower relay continuity.
Refer to
.
Q: Is the blower relay continuity in good condition?
YES :
Go to Step 8.
NO :
Replace the blower relay.
Step 8. Voltage measurement at B-116 blower
relay connector.
AC313824
Connector: B-116
AD
Junction block side
Junction block (Front view)
(1) Remove the relay, and measure at the junction
block side.
(2) Turn the ignition switch to the "ON" position.
AC310507EV
Connector B-116
(Junction block side)
(3) Measure the voltage between terminal 1 and
earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 10.
NO :
Go to Step 9.
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/son.png)
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55A-18
Step 9. Check the wiring harness between B-116
blower relay connector terminal No.1 and the
ignition switch (IG2).
AC313824
Connector: B-116
AD
Junction block side
Junction block (Front view)
NOTE:
AC313826
Harness side
AE
Connector: B-130
Junction block (Rear view)
Prior to the wiring harness inspection, check junction
block connector B-130, 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. Resistance measurement at B-116
blower relay connector.
AC313824
Connector: B-116
AD
Junction block side
Junction block (Front view)
(1) Remove the relay, and measure at the junction
block side.
AC310506 DV
Connector B-116
(Junction block side)
(2) Measure the resistance Continuity between
terminal 2 and body earth.
OK: 2 ohms or less
Q: Is the check result normal?
YES :
Go to Step 12.
NO :
Go to Step 11.
Step 11. Check the wiring harness between B-116
blower relay connector terminal No.2 and earth.
AC313824
Connector: B-116
AD
Junction block side
Junction block (Front view)
NOTE:
AC313826 AF
Connector: B-131
Junction Block (Rear view)
Harness side
Prior to the wiring harness inspection, check junction
block connectors B-131, and repair if necessary.
• Check the blower relay earth wires for open cir-
cuit.
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.
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/inth.png)
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55A-19
Step 12. Voltage measurement at B-116 blower
relay connector.
AC313824
Connector: B-116
AD
Junction block side
Junction block (Front view)
(1) Remove the relay, and measure at the junction
block side.
AC310507 EW
Connector B-116
(Junction block side)
(2) Measure the voltage between terminal 3 and
body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 14.
NO :
Go to Step 13.
Step 13. Check the wiring harness between B-116
blower relay connector terminal No.3 and fusible
link (6).
AC313825 AE
Connectors: B-108, B-116
Junction Block (Front view)
B-116
B-108 (B)
Harness side
B-108
Junction block side
B-116
NOTE: Prior to the wiring harness inspection, check
junction block connector B-108, and repair if neces-
sary.
• 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 14. Connector check: B-31 blower switch
connector
AC401055
Connector: B-31
AM
Harness side
B-31 (B)
Q: Is the check result normal?
YES :
Go to Step 15.
NO :
Repair the connector.
Main
Index
Group
TOC
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