TROUBLESHOOTING
ENGINE COOLING14-9
STEP 7. Check the harness wire between fusible
link No.2 and fan control relay connector A-09X
terminal 4.
Q: Is the harness wire in good condition?
YES : .
An intermittent malfunction is suspected
(Refer to GROUP 00 - How to use
troubleshooting P.00-5).
NO : . Repair the damaged harness wire. Then go
to Step 24 .
STEP 8. Check the fan control relay.
Refer to P.14-24.
Q: Is the fan control relay in good condition?
YES :
Go to Step 9 .
NO : Replace the fan control relay. Then go to
Step 24 .
STEP 9. Check the fan control relay connector
A-09X.
Q: Is the connector in good condition?
YES :
Go to Step 10 .
NO : Repair the connector or replace the relay
box. Then go to Step 24 .
STEP 10. Check the harness wire between fan
control relay connector A-09X terminal 2 and
cooling fan motor drive control unit connector
A-18 terminal 3.
Q: Is the harness wire in good condition?
YES :
Go to Step 11 .
NO : Repair the damaged harness wire. Then go
to Step 24 .
STEP 11. Measure the terminal voltage at fan
control relay connector A-09X.
(1) Disconnect fan control relay connector A-09X
(remove the fan control relay) and measure relay
box side connector.
(2) Turn the ignition switch to the "ON" position.
AC303509AB
Fusible link
No.2
Relay box
AC303510AB
Fan control relay
Relay boxConnector: A-09X
A-09X
AC303510AB
Fan control relay
Relay boxConnector: A-09X
A-09X
AC303510AB
Fan control relay
Relay boxConnector: A-09X
A-09X
AC100293
A-18
321
Connector: A-18
AD
AC303510AB
Fan control relay
Relay boxConnector: A-09X
A-09X
TROUBLESHOOTING
ENGINE COOLING14-10
(3) Measure the voltage between fan control relay
connector A-09X terminal 1 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-09X
(install the fan control relay).
Q: Is the measured voltage system voltage?
YES : .
Go to Step 14 .
NO : . Go to Step 12 .
STEP 12. Check the J/C No.6 C-12
vehicles> or C-134 ,
intermediate connector A-13
vehicles> C-111 and fan
control relay connector A-09X.
AC303517AB
A-09X Connector
(Relay box side)
AC303524
Connector: C-12
AB
C-12
C-12
AC303525
Connector: C-134
AB
C-134
C-134
AC303526
Connector: A-13
AB
A-13
A-13
AC303527
Connector: C-111
AB
C-111
C-111
615
121179
810234
TROUBLESHOOTING
ENGINE COOLING14-11
Q: Are there connectors in good condition?
YES : .
Go to Step 13 .
NO : . Repair or replace the connector. Then go to
Step 24 .
STEP 13. Check the harness wire between J/C
No.6 C-12 terminal 33 or
C-134 terminal 33 and fan
control relay connector A-09X terminal 1.
Q: Are these harness wires in good condition?
YES :
An intermittent malfunction is suspected
(Refer to GROUP 00 - How to use
troubleshooting P.00-5).
NO : Repair the damaged harness wire. Then go
to Step 24 .
STEP 14. Check the continuity between fan
control relay connector A-09X and body earth.
(1) Disconnect fan control relay connector A-09X
(remove the fan control relay) and measure relay
box side connector.
(2) Measure the resistance between fan control relay
connector A-09X terminal 3 and body earth.
•Continuity exists.
(3) Connect fan control relay connector A-09X
(install the fan control relay).
Q: Does the continuity exists?
YES :
An intermittent malfunction is suspected
(Refer to GROUP 00 - How to use
troubleshooting P.00-5).
NO : Go to Step 15 .
AC303510AB
Fan control relay
Relay boxConnector: A-09X
A-09X
AC303524
Connector: C-12
AB
C-12
C-12
AC303525
Connector: C-134
AB
C-134
C-134
AC303510AB
Fan control relay
Relay boxConnector: A-09X
A-09X
AC303510AB
Fan control relay
Relay boxConnector: A-09X
A-09X
AC303533AB
A-09X Connector
(Relay box side)
TROUBLESHOOTING
ENGINE COOLING14-12
STEP 15. Check the fan control relay connector
A-09X.
Q: Is the connector in good condition?
YES :
Go to Step 16 .
NO : Repair the connector or replace the relay
box. Then go to Step 24 .
STEP 16. Check the harness wire between fan
control relay connector A-09X terminal 3 and
body earth.
Q: Is the harness wire in good condition?
YES :
An intermittent malfunction is suspected
(Refer to GROUP 00 - How to use
troubleshooting P.00-5).
NO : Repair the damaged harness wire. Then go
to Step 24 .
STEP 17. Check the continuity between cooling
fan motor drive control unit connector A-18 and
body earth.
(1) Disconnect cooling fan motor drive control unit
connector A-18 and measure wiring harness side
connector.
(2) Measure the resistance between cooling fan
motor drive control unit connector A-18 terminal 1
and body earth.
•Continuity exists.
(3) Connect cooling fan motor drive control unit
connector A-18.
Q: Dose the continuity exists?
YES :
Go to Step 20 .
NO : Go to Step 18 .
AC303510AB
Fan control relay
Relay boxConnector: A-09X
A-09X
AC303510AB
Fan control relay
Relay boxConnector: A-09X
A-09X
AC100293
A-18
321
Connector: A-18
AD
AC303534AB
A-18 Connector
(Wiring harness side)