D12 Check Circuits 145 (Gy/Bk) And 605 (R) For Short To Power; D13 Monitor The 4Wd And 2Wd Vacuum Solenoid Pids 4Wdsol And 2Wdsol; D14 Check The Voltage To The 4Wd And 2Wd Vacuum Solenoids — Circuit 294 (W/Lb) - Ford Expedition 1998 Workshop Manual

1998 Expedition/Navigator Workshop Manual

D12 CHECK CIRCUITS 145 (GY/BK) AND 605 (R) FOR SHORT TO POWER

4WD Vacuum Solenoid C180
2WD Vacuum Solenoid C181
GEM C241

D13 MONITOR THE 4WD AND 2WD VACUUM SOLENOID PIDs 4WDSOL AND 2WDSOL

D14 CHECK THE VOLTAGE TO THE 4WD AND 2WD VACUUM SOLENOIDS — CIRCUIT 294 (W/LB)
http://www.fordtechservice.dealerconnection.com/pubs/content/~WSWJ/~MUS~LEN/21/...
Does the PID 4WDSOL indicate OFF--- and 2WDSOL indicate ON---?
Yes
GO to D20.
No
If the PID 2WDSOL indicates ON-B-, GO to D12
Measure the voltage between 4WD vacuum solenoid C180, circuit 605 (R), and ground; and between 2WD
vacuum solenoid C181, circuit 145 (GY/BK), and ground.
Is any voltage indicated?
Yes
REPAIR circuit(s) (145 [GY/BK], 605 [R]). CLEAR the DTCs. TEST the system for normal operation.
No
GO to D13.
Monitor the PID 4WDSOL and 2WDSOL.
NOTE: The active commands AXLE ENGG and AXLE DSCN are located in the 4-Wheel Electronic Shift active
command menu.
Set the active commands AXLE ENGG and AXLE DSCN to ON.
Does the PID 4WDSOL or 2WDSOL indicate ON-B-?
Yes
REPLACE the GEM; REFER to Section 419-10. CLEAR the DTCs. TEST the system for normal operation.
No
REPLACE the vacuum solenoid in question. CLEAR the DTCs. TEST the system for normal operation.
. If the PID 4WDSOL indicates OFFO-G, GO to
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8/30/2010