Pinpoint Tests; The Wipers Are Inoperative - Front - Ford Expedition 2000 Workshop Manual

2000 Expedition/Navigator Workshop Manual
No communication with the module — GEM

Pinpoint Tests

CAUTION: Disconnect the battery before removing and installing the generic electronic module (GEM) or its connectors. Failure to follow this caution
will result in the GEM storing many erroneous DTCs and it may exhibit erratic operation after installation.
CAUTION: Be careful when probing the fuse junction box, power distribution box or any connectors. Damage will result to the connector receptacle if
the probe or terminal being used is too large.
CAUTION: Electronic modules are sensitive to static electrical charges. If exposed to these charges, damage may result.
NOTE: If continuous diagnostic trouble codes (DTCs) are recorded and the symptom is not present when performing the Pinpoint Tests, an intermittent concern may
be the cause. Always check for loose connections and corroded terminals.
PINPOINT TEST A: THE WIPERS ARE INOPERATIVE — FRONT
NOTE: Complete the entire Pinpoint Test related to the symptom before replacing the GEM.
CONDITIONS
A1 CHECK THE VOLTAGE OUTPUT FROM FUSE JUNCTION PANEL 15 (5A)
A2 CHECK THE IGNITION STATES — MONITOR PID IGN_A, IGN_S, IGN_R, AND IGN_O/L
Scan Tool
A3 RETRIEVE THE DTCS
http://www.fordtechservice.dealerconnection.com/pubs/content/~WSYJ/~MUS~LEN/20...
GEM.
Circuitry.
Fuses.
Circuitry.
GEM.
DETAILS/RESULTS/ACTIONS
Measure the voltage between Fuse Junction Panel 15 (5A) Pin 1 and ground.
Is the voltage greater than 10 volts?
Yes
GO to A2.
No
REPLACE the fuse in question or REPAIR Circuit 1052 (T/BK). CLEAR the DTCs. TEST the
system for normal operation. If the fuse fails again, CHECK for a short to ground. REPAIR as
necessary.
Monitor the PIDS IGN_A, IGN_S, IGN_R, AND IGN_O/L while turning the ignition switch
through the START, RUN, OFF and ACC positions.
Do the PID values agree with the ignition switch positions?
Yes
GO to A3.
No
REPAIR the ignition circuit (RUN/ACC: Circuit 297 [BK/LG], RUN: Circuit 687 [GY/Y], START:
Circuit 32 [R/LB] or Circuit 687 [GY/Y]) in question. CLEAR the DTCs. TEST the system for
normal operation.
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Test L.
GO to Pinpoint
Test F.
8/4/2010