Inspection And Verification; Visual Inspection Chart; Gem Diagnostic Trouble Code (Dtc) Index; Neutral Safety Switch Input Conditions - Ford Expedition 1998 Workshop Manual

1998 Expedition/Navigator Workshop Manual
HI-to-LO LO-to-HI Mode
GROUND B+ 4 HIGH to 4 LOW
B+ GROUND 4 LOW to 4 HIGH
GROUND GROUND Brake Motor
Table 3 — Neutral Safety Switch Input Conditions
Transmission State Start/Clutch Depressed Input Transmission Range Sensor Input
In Gear Open
Park Ground
Neutral Ground
(Start) Park Battery Voltage
(Start) Neutral Battery Voltage
Table 4 — Contact Plate Sensor Position Codes
Contact Plate Code Left Mech.Stop Left Stop A4WD/2H 2H E
A Closed Closed
B Open
C Open Closed
D Open
*
Refers to the code at the point of transition between two positions or areas of the sensor.
*
Refers to the code at the point of transition between two positions or areas of the sensor.

Inspection and Verification

1. Verify the customer concern by operating the 2WD/4WD engagement.
2. Visually inspect for obvious signs of mechanical, electrical and vacuum damage; refer to the following chart:

Visual Inspection Chart

Mechanical Electrical
Switch(es) Fuse(s)
Vacuum leaks Damaged wiring harness
Loose or corroded connector(s)
Circuitry
3. If the concern remains after the inspection connect the New Generation STAR (NGS) Tester to the data link connector (DLC) located beneath the instrument panel and select the
vehicle to be tested from the NGS menu. If the NGS does not communicate with the vehicle:
Check that the program card is properly installed.
Check the connections to the vehicle.
Check the ignition switch position.
4. If the NGS still does not communicate with the vehicle, refer to the New Generation STAR Tester manual.
5. Perform the DATA LINK DIAGNOSTIC TEST. If the NGS responds with:
CKT 914, CKT 915 OR CKT 70 = ALL ECUS NO RESP/NOT EQUIP, refer to
NO RESP/NOT EQUIP for Generic Electronic Module (GEM), go to Pinpoint Test E.
SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and perform self-test diagnostics for the GEM.
6. If the DTCs retrieved are related to the concern, go to GEM Diagnostic Trouble Code (DTC) Index to continue diagnostics.
7. If no DTCs related to the concern are retrieved, proceed to the Symptom Chart to continue diagnostics.

GEM Diagnostic Trouble Code (DTC) Index

GEM Diagnostic Trouble Code (DTC) Index
DTC Test Mode
B1214 Continuous, On- Running board lamp relay coil open or short to ground.
Demand
B1215 Continuous, On- Running board lamp relay coil short to power.
Demand
B1240 Continuous Rear washer pump relay coil open or short to ground.
B1241 Continuous Rear washer pump relay coil short to power.
B1302 Continuous, On- Accessory delay relay coil open or short to ground. (Only set if battery saver relay
Demand has no faults.)
B1304 Continuous, On- Accessory delay relay coil short to power.
Demand
B1313 Continuous, On- Battery saver relay coil open or short to ground.
Demand
B1315 Continuous, On- Battery saver relay coil short to power.
Demand
B1317 Continuous, On- Battery voltage HIGH, greater than 18.0 volts.
http://www.fordtechservice.dealerconnection.com/pubs/content/~WSWJ/~MUS~LEN/21/...
Open
Open
Ground
Open
Ground
*
4H E 4H
Closed Closed Closed Open
Open Open Closed Closed Closed Closed Closed
Closed Closed Closed Closed Closed Open
Open Closed Closed Open Open Closed Closed
Description
*
4L E 4L Right Mech.Stop
Open Open Closed
Closed
Open
Closed
Section 418-00.
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Section
417-02.
417-02.
501-16.
501-16.
501-11.
501-11.
417-02.
417-02.
414-02.
8/30/2010