Ford F-150 2002 - Page 22

 Is the voltage greater than 10 volts?
Yes
GO to D4.
No
REPAIR the circuit. TEST the system for normal operation.
D4 ELECTRICAL SIGNAL CHECK
Leave the positive lead connected to pin 11 and connect the negative lead to pin 12 harness
side.
Activate solenoids (ON and OFF) while monitoring the voltage reading.
Trans-Bench Mode
Parameter; PCx
Select a value "0-90 psi".
Press "SEND".
Select another value "0-90 psi".
Press "SEND".
XXX
Press "SEND".
 Does the voltage and solenoid state change?
Yes
GO to D5.
No
CHECK for open or short circuit in harness or PCM.
D5 CHECK SOLENOID RESISTANCE AT SOLENOID
Measure and record the resistance between EPC solenoid pin 11 and pin 12. Resistance
should be between 3.0 and 5.0 ohms.
Page
22
of
33
2002 F
-
150 Workshop Manual
9/17/2010
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS21/~MUS~LEN/19/S
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