Instrument Cluster
Refer to Wiring Diagrams Cell 62, Instrument Cluster for schematic and connector information.
Principles of Operation
Speedometer Gauge
The instrument cluster receives the vehicle speed signal from the powertrain control module (PCM) over the SCP network and displays it on the speedometer gauge. If the instrument
cluster receives no vehicle speed signal after one second, the speedometer defaults to 0.0 km/h (0.0 mph).
Fuel Gauge
The instrument cluster receives the fuel level information directly from the fuel sender. When the instrument cluster fails to receive the fuel level signal for more than 33 seconds, then the
fuel level gauge will move below E (empty). If the fuel level signal then operates correctly for more than 33 seconds, the fuel gauge will return to the correct position.
Fuel fills of less than 22.7 liters (6 gallons) require at least 5-20 minutes to update the fuel gauge indication.
Engine Coolant Temperature Gauge
Engine coolant temperature information is received by the instrument cluster from the PCM over the SCP network. Temperatures over 121°C (275°F) will display hot (H). If the engine
coolant temperature data is missing or invalid for five seconds, the instrument cluster will move the engine coolant temperature gauge below the cold (C) position.
Boost Pressure Gauge (Lightning only)
The boost pressure gauge on the instrument cluster receives the boost pressure status directly from the intake manifold. The boost pressure gauge will display three conditions: boost
pressure with acceleration, vacuum pressure at idle, or 0 pressure at consistent engine load and rpm.
Odometer
The instrument cluster receives odometer rolling count status from the PCM and stores the mileage in non-volatile memory (NVM). When the instrument cluster fails to receive the odometer
rolling count status for more than two seconds, the odometer display will show dashes.
Low Oil Pressure Indicator
The low oil pressure indicator on the instrument cluster receives the oil pressure status directly from the oil pressure switch. The two-position oil pressure gauge will display either normal or
no oil pressure. The low oil pressure indicator will prove out when the ignition switch is placed in the START position and then in the RUN position.
Brake Warning Indicator
The BRAKE indicator will prove out when the ignition switch is placed in the START and then in the RUN position. The BRAKE indicator will also be illuminated when the instrument cluster
receives a ground signal from the parking brake switch or the brake fluid level switch.
Safety Belt Indicator
The seat belt switch is hardwired to the generic electronic module (GEM) or central timer module (CTM). The safety belt warning indicator will be illuminated when the GEM/CTM sends a
ground signal to the instrument cluster. The safety belt indicator will prove out when the ignition switch is placed in the START position and then in the RUN position.
Yellow ABS Warning Indicator
The ABS indicator will be illuminated when the anti-lock brake control module sends an open signal to the instrument cluster. The prove out of the ABS indicator is controlled by the anti-lock
brake control module.
Service Engine Soon Indicator
After the engine is started, the SERVICE ENGINE SOON indicator will prove out for a duration of three seconds. If the instrument cluster does not receive a message from the PCM within
five seconds, the instrument cluster will send two messages to the PCM and attempt to reestablish communication. If the instrument cluster is unable to establish communication, the
instrument cluster will illuminate the SERVICE ENGINE SOON indicator and log a diagnostic trouble code (DTC).
High Beam Indicator
The high beam indicator will illuminate when the multifunction switch is in the high beam position and sends a battery signal to the instrument cluster.
Right and Left Turn Indicator
SECTION 413-01A: Instrument Cluster — Conventional 2001 F-150 Workshop Manual
DIAGNOSIS AND TESTING
Procedure revision date: 12/16/2003
Special Tool(s)
Instrument Gauge System Tester
014-R1063 or equivalent
73III Automotive Meter
105-R0057 or equivalent
Worldwide Diagnostic System (WDS)
418-F224,
New Generation STAR (NGS) Tester
418-F052, or equivalent diagnostic tool
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS11/~MUS~LEN/19/S
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