Ford F-150 1998 - ESOF Symptom Chart

GEM Active Command Index
GEM Active Command Index
Symptom Chart — Electronic Shift on the Fly (ESOF)
PARK_SW Headlamp Control Input Switch ON, OFF
PLATE_A Transfer Case Contact Plate Switch A OPEN, CLOSED
PLATE_B Transfer Case Contact Plate Switch B OPEN, CLOSED
PLATE_C Transfer Case Contact Plate Switch C OPEN, CLOSED
PLATE_D Transfer Case Contact Plate Switch D OPEN, CLOSED
PLATEPW Contact Plate Ground Output ON, OFF
SBLTMP Safety Belt Warning Indicator ON---, OFF---, ON-B-, OFFO-G
SPEEDWP Speed Dependent Wiper Function ACTIVE, notACT
VBATGEM Battery 0.1 Volt DC per count
VSS_GEM Vehicle Speed Sensor 0-255 KPH
WASHRLY Washer Pump Relay Circuit ON---, OFF---, ON-B-, OFFO-G
WASH_SW Washer Relay Output ON---, OFF---, ON-B-, OFFO-G
WPHISP Wiper HI/LO Relay Status ON---, OFF---, ON-B-, OFFO-G
WPMODE Wiper/Washer Switch Status WASH, OPEN, INVLD, OFF, INTVL 1-7, LOW, HIGH
WPPK_PK Wiper Park to Park Time 0 to 65 ms
WPPRKSW Wiper Motor Switch Status PARKED, notPRK
WPRUN Wiper Run/Park Relay Status ON---, OFF---, ON-B-, OFFO-G
2WDSOL 2WD Solenoid Status ON---, OFF---, ON-B-, OFFO-G
4WDCLST Four Wheel Drive Clutch Relay Control ON---, OFF---, ON-B-, OFFO-G
4WDHIGH 4WD High Indicator Status ON---, OFF---, ON-B-, OFFO-G
4WDLOW 4WD Low Indicator Status ON---, OFF---, ON-B-, OFFO-G
4WDSGEM 4WD Mode INVLD, 2WD, 4WDLOW, 4WDHIGH, OFFO-G
4WDSOL 4WD Solenoid Status ON---, OFF---, ON-B-, OFFO-G
Active Command Display Action
PID LATCH PID LATCH ON, OFF
WINDSHIELD WIPER WIPER RLY ON, OFF
WINDSHIELD WIPER SPEED RLY ON, OFF
WINDSHIELD WIPER WASH RLY ON, OFF
WARNING LAMPS AND CHIME SBLT LAMP ON, OFF
WARNING LAMPS AND CHIME CHIME ON, OFF
WINDSHIELD WIPER AJAR LAMP ON, OFF
BATTERY SAVER BATT SAVR ON, OFF
INTERIOR COURTESY LAMPS INT LAMPS ON, OFF
ONE TOUCH DOWN AND ACCESSORY DELAY ACCY RLY ON, OFF
ONE TOUCH DOWN AND ACCESSORY DELAY ONE TOUCH ON, OFF
4-WHEEL ELECTRONIC SHIFT CW/CCW ON, OFF
4-WHEEL ELECTRONIC SHIFT HIGH LAMP ON, OFF
4-WHEEL ELECTRONIC SHIFT LOW LAMP ON, OFF
4-WHEEL ELECTRONIC SHIFT AXLE ENGG ON, OFF
4-WHEEL ELECTRONIC SHIFT AXLE DSCN ON, OFF
4-WHEEL ELECTRONIC SHIFT PLATE PWR ON, OFF
4-WHEEL ELECTRONIC SHIFT SHFT CLCH ON, OFF
Symptom Chart
Condition Possible Sources Action
 The Vehicle Does Not Shift Between 2WD and 4WD Modes Properly  4 WD mode switch.
 Transfer case shift relays.
 Contact plate A, B, C, or D.
 Transfer case shift motor.
 Circuitry.
 Transfer case mechanism.
 GO to Pinpoint
Test A.
 The Vehicle Does Not Shift Between 4WD High and 4WD Low Modes Properly  4WD mode switch.
 Neutral safety switch.
 Brake pedal position (BPP)
switch.
 GO to Pinpoint
Test B.
Page 5 of 741998 F-150/250 Workshop Manual
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