Mitsubishi 380. Manual — part 231
ENGINE COOLING DIAGNOSIS
ENGINE COOLING
14-8
STEP 5. Check the fan control relay connector A-10X.
Q: Is the connector in good condition?
YES : Go to Step 6.
NO : Repair the connector or replace the relay box. Then
go to Step 24.
STEP 6. Check the harness wire between fusible link No.2
and fan control relay connector A-10X terminal 4.
Q: Is the harness wire in good condition?
YES : An intermittent malfunction is suspected (Refer to
GROUP 00 - How to use troubleshooting
NO : Repair the damaged harness wire. Then go to Step
24.
STEP 7. Check the fan control relay.
Refer to
Q: Is the fan control relay in good condition?
YES : Go to Step 8.
NO : Replace the fan control relay. Then go to Step 24.
04DB012A
Fusible link
No.2
Relay box
Fan control
relay
A-10X
4
04DB010A
Fusible link
No.2
Relay box
Fan control
relay
04DB012A
Fusible link
No.2
Relay box
Fan control
relay
A-10X
4
ENGINE COOLING DIAGNOSIS
ENGINE COOLING
14-9
STEP 8. Check the fan control relay connector A-10X.
Q: Is the connector in good condition?
YES : Go to Step 9.
NO : Repair the connector or replace the relay box. Then
go to Step 24.
STEP 9. Check the harness wire between fan control relay
connector A-10X terminal 2 and fan controller connector
A-24 terminal 3.
Q: Is the harness wire in good condition?
YES : Go to Step 10.
NO : Repair the damaged harness wire. Then go to Step
24.
04DB012A
Fusible link
No.2
Relay box
Fan control
relay
A-10X
4
04DB012A
Fusible link
No.2
Relay box
Fan control
relay
A-10X
4
04DB008A
1
2
3
A-24
Connector: A-24
ENGINE COOLING DIAGNOSIS
ENGINE COOLING
14-10
STEP 10. Measure the terminal voltage at fan control relay
connector A-10X.
(1) Disconnect fan control relay connector A-10X (remove the
fan control relay) and measure relay box side connector.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between fan control relay connector
A-10X terminal 3 and body earth.
• The voltage should measure system voltage.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Connect fan control relay connector A-10X (install the fan
control relay).
Q: Is the measured voltage system voltage?
YES : Go to Step 13.
NO : Go to Step 11.
04DB012A
Fusible link
No.2
Relay box
Fan control
relay
A-10X
4
04DB014A
A-10X Connector
(Relay box side)
ENGINE COOLING DIAGNOSIS
ENGINE COOLING
14-11
STEP 11. Check the ECU connector B-21, intermediate
connector A-13 and fan control relay connector A-10X.
Q: Are there connectors in good condition?
YES : Go to Step 12.
NO : Repair or replace the connector. Then go to Step 24.
16DB400A
COVER
ENGINE
CONTROL
UNIT
AIR
CLEANER
AK303148
CONNECTOR: A-13
AB
A-13(GR)
04DB012A
Fusible link
No.2
Relay box
Fan control
relay
A-10X
4
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