B45 Check Circuit 770 (W) For Open; B46 Check Circuit 770 (W) For Short To Power; B47 Monitor The Pid Plate_C For Open - Ford Expedition 1998 Workshop Manual

1998 Expedition/Navigator Workshop Manual

B45 CHECK CIRCUIT 770 (W) FOR OPEN

B46 CHECK CIRCUIT 770 (W) FOR SHORT TO POWER

GEM C241

B47 MONITOR THE PID PLATE_C FOR OPEN

http://www.fordtechservice.dealerconnection.com/pubs/content/~WSWJ/~MUS~LEN/21/...
Is the resistance greater than 10,000 ohms?
Yes
REPLACE the GEM; REFER to Section 419-10. CLEAR the DTCs. TEST the system for normal operation.
No
REPAIR circuit 770 (W). CLEAR the DTCs. CYCLE the ignition switch to OFF, then ON. TEST the system for
normal operation.
Measure the resistance between transfer case assembly C201-1, circuit 770 (W), and GEM C241-20, circuit 770
(W).
Is the resistance less than 5 ohms?
Yes
GO to B46.
No
REPAIR circuit 770 (W). CLEAR the DTCs. CYCLE the ignition switch to OFF, then ON. TEST the system for
normal operation.
Measure the voltage between transfer case assembly C201-1, circuit 770 (W), and ground.
Is any voltage indicated?
Yes
REPAIR circuit 770 (W). CLEAR the DTCs. CYCLE the ignition to OFF, then ON. TEST the system for normal
operation.
No
REPLACE the GEM; REFER to Section 419-10. CLEAR the DTCs. CYCLE the ignition to OFF, then ON. TEST
the system for normal operation.
NOTE: The active command PLATE PWR is located in the 4-Wheel Electronic Shift active command menu.
Set the active command PLATE PWR to ON.
Monitor the PID PLATE_C.
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