Monitor the GEM PID IGN_GEM while turning the ignition switch through the RUN, OFF and ACC positions.
Do the PID values agree with the ignition switch positions?
Yes
GO to
B2
.
No
REFER to
Section 417-02
.
B2
RETRIEVE THE DIAGNOSTIC TROUBLE CODES (DTCS)
Retrieve and document continuous DTCs.
Clear Continuous DTCs
GEM On-Demand Self-Test
Are any DTCs recorded?
Yes
If DTC B1342, REPLACE the GEM; REFER to
Section 419-10
. CLEAR the DTCs. TEST the system for normal
operation.
If DTC B1483, GO to
B17
.
If DTC B1485, GO to
B17
.
If DTC P0500 and the vehicle is equipped with RABS, GO to
B24
.
If DTC P0500 and the vehicle is equipped with 4WABS, GO to
B27
.
If DTC P1812, GO to
B5
.
If DTC P1815, GO to
B5
.
No
GO to
B3
.
B3
CHECK THE 4X4 HIGH LAMP INDICATOR — TRIGGER THE GEM ACTIVE COMMAND HIGH LAMP ON
Trigger the GEM active command HIGH LAMP ON then OFF.
Does the 4x4 HIGH indicator illuminate then go off?
Yes
GO to
B4
.
No
GO to
Pinpoint Test C
.
B4
CHECK THE 4X4 LOW LAMP INDICATOR — TRIGGER THE GEM ACTIVE COMMAND LOW LAMP ON
Trigger the GEM active command LOW LAMP ON then OFF.
Does the 4x4 LOW indicator illuminate then go off?
Yes
Exit the GEM active command mode; GO to
B5
.
No
GO to
Pinpoint Test C
.
B5
CHECK THE 4X4 MODE SWITCH — MONITOR THE GEM PID 4WD_SW IN 2WD POSITION
Place the mode switch in the 2WD position.
Page 33 of 62
2000 Ranger Workshop Manual
1/18/2012
http://www.fordtechservice.dealerconnection.com/pubs/content/~WSYL/~MUS~LEN/21/...
