Ford Electric Ranger 2001 Manual page 323

412-02-29
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST R: RECIRCULATION FUNCTION DOES NOT OPERATE
• Is the outside/recirculation door in the recirculation position?
R4 CHECK OPERATION OF RECIRCULATION VACUUM
SOLENOID
• With key ON, set the mode select knob to the FLOOR/PANEL position.
• Enter the interface adapter assembly (IAA) module active command
mode CLIMATE CONTROL COMMAND and set the active commands
MAINT VAC to YES and RECIR SOL to ON.
• Check the position of the outside/recirculation door.
• Is the outside/recirculation door in the recirculation position?
R5 CHECK POWER TO IN-LINE C2999
• With key OFF, disconnect in-line C2999.
• With key ON, measure the voltage between pin 8 (Y/LG wire) and pin 7
(BK wire) on in-line C2999.
• Is the voltage greater than 10 volts?
R6 CHECK GROUND TO IN-LINE C2999
• With key OFF, measure the resistance between pin 7 (BK wire) on
in-line C2999 and ground.
• Is the resistance less than 5 ohms?
R7 CHECK CIRCUIT 3052 (Y/LG) FOR OPEN
• Connect 104-Pin Breakout Box (BOB) to IAA module C1945; leave IAA Yes =
module disconnected.
• With key OFF, measure the resistance of the Y/LG wire between pin 8
on in-line C2999 and BOB pin 35.
• Is the resistance less than 5 ohms?
R8 CHECK CIRCUIT 3052 (Y/LG) FOR SHORT TO GROUND
• With key OFF, measure the resistance between BOB pin 35 and ground
(BOB pin 80).
• Is the resistance greater than 10,000 ohms?
R9 CHECK POWER TO RECIRCULATION VACUUM SOLENOID
• With key OFF, disconnect recirculation vacuum solenoid C2994.
• With key ON, measure the voltage between the Y/LG wire and BK wire
on recirculation vacuum solenoid C2994.
• Is the voltage greater than 10 volts?
R10 CHECK GROUND TO RECIRCULATION VACUUM SOLENOID
• With key OFF, measure the resistance between the BK wire on
recirculation vacuum solenoid C2994 and ground.
• Is the resistance less than 5 ohms?
R11 CHECK VACUUM FROM RECIRCULATION VACUUM
SOLENOID
• With key ON, set the mode select knob to the OFF position, disconnect
the white vacuum line from the recirculation vacuum solenoid, and check
for vacuum.
• Is vacuum present?
R12 CHECK VACUUM TO RECIRCULATION VACUUM SOLENOID
(Continued)
Heating and Ventilation
TEST STEP ACTION TO TAKE
No = GO to R4.
Yes = GO to R13.
GO to R5.
No =
Yes = RECONNECT in-line
C2999. GO to R9.
GO to R6.
No =
GO to R7.
Yes =
No = REPAIR the BK wire.
GO to R8.
No = REPAIR the Y/LG wire.
Yes = REPLACE the IAA module.
REFER to Section
No = REPAIR the Y/LG wire.
GO to R11.
Yes =
GO to R10.
No =
GO to R11.
Yes =
No = REPAIR the BK wire.
Yes = CHECK the
fresh/recirculation door
vacuum motor for vacuum
leak. REPLACE if
necessary.
GO to R12.
No =
2001 Ranger EV, 01/2001
412-02-29
412-04.