Ford Transit 2002 Owner's Manual page 1485

C39: CHECK FOR OPEN CIRCUIT BETWEEN AIR CONDITIONING CLUTCH RELAY AND
PCM
C40: CHECK THE A/C REQUEST SIGNAL IN THE CENTRAL TIMER MODULE (CTM)
NOTE: The central timer module (CTM) is integrated in the instrument cluster.
C41: CHECK THE CONTROL VOLTAGE AT THE INSTRUMENT CLUSTER
Is a resistance of less than 2 Ohm registered?
Yes
GO to C39.
No
LOCATE and REPAIR the break in circuit 91S-RE8
(BK/YE) between the refrigerant low-pressure
switch and the PCM using the Wiring Diagrams.
CHECK the operation of the system.
Measure the resistance between the PCM,
1
connector C418, pin F2, circuit 31S-FA11 (BK/YE),
wiring harness side and the A/C clutch relay, socket
C1011, pin 2, circuit 31S-FA11 (BK/YE), wiring
harness side.
Is a resistance of less than 2 Ohm registered?
Yes
GO to C25.
No
LOCATE and REPAIR the break in circuit 31S-FA11
(BK/YE) between the refrigerant low-pressure
switch and the PCM using the Wiring Diagrams.
CHECK the operation of the system.
Switch on the blower.
1
Switch on the air-conditioning system.
2
Using the diagnostic unit, select the CTM and check
3
in the data logger whether an A/C request signal is
displayed.
Is an A/C request signal displayed in the data logger of
the CTM?
Yes
CHECK and if necessary RENEW the instrument
cluster. CHECK the operation of the system.
No
GO to C41.
Ignition switch in position 0.
1
Disconnect Connector C809 from instrument
2
cluster.
Ignition switch in position II.
3
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