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LESSON 4: ELECTRICAL
Self-Test Mode
Message Center Cluster Display
TEST
GAUGES SWEEP
All segments illuminated
TEST TELLTALES
PART NUMBER, 4L2T-10849-##
SERIAL NUMBER ######
IGNITION KEY
ROM LEVEL ####, CHECKSUM ####
NVM LEVEL ##, CHKSUM ####
FINAL DATE, ####
MODULE CONFIG, BYTE1-BYTE4=##
DIAG TROUBLE, CODE: ####
VEHICLE SPEED, ###.# MPH
VEHICLE SPEED, ###.# KPH
TACH VALUE, ####RPM
FUEL LEVEL A/D, ###
FUEL LEVEL %, ###
COOLANT TEMP, ###
ODO HSCAN INPUT, ###
4-20
Description
Initial entry display into self-test mode.
Carries out gauge sweep of all gauges, then displays the
present gauge values. Also carries out the checksum test on
ROM and EEPROM.
Illuminates all odometer segments.
Illuminates all micro-controlled lamps and LEDs.
Displays alphanumeric part number.
Displays serial number in decimal.
Displays key-in ignition status.
Returns to normal operation of all micro-controlled lamps
and LEDs and displays hexadecimal value for Read-Only
Memory (ROM) level (used when requesting assistance
from the hotline).
Displays hexadecimal ROM level and type as stored in
Non-Volatile Memory (NVM).
Displays hexadecimal coding of final manufacturing test
date.
Displays hexadecimal of bytes 1-4 of module configuration
settings.
Displays a 16-bit DTC in hexadecimal format. DTCs
displayed are those detected in continuous operation, not
during self-test.
Displays English speed value being input, speedometer will
indicate present speed.
Displays metric speed value being input, speedometer will
indicate present speed.
Displays the tachometer value being input to the instrument
cluster. Tachometer will indicate present rpm.
Displays present fuel level analog/digital ratio input in
decimal. The instrument cluster will indicate present fuel
level.
Displays present fuel level percent status in decimal.
Displays last temperature gauge input value from HSCAN,
temperature gauge will indicate present temperature.
Displays the odometer input received through HSCAN in
decimal.
12-AUG-03
2004 Explorer/Mountaineer New Model Technician Training
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