SERVICE MANUAL NUMBER 23
FUEL INJECTION SYSTEM TROUBLESHOOTING
Page 5D-5
90-861326--1 MARCH 1999
Scan Tool Normal Specifications (Idle / Warm Engine / Closed Throttle /
Neutral)
SCAN POSITION UNITS DISPLAYED TYPICAL DATA VALUE
rpm rpm 600-700 rpm
Desired rpm rpm 600 rpm
Coolant Temp. ° F(° C) 150-170° F (66-77° C)
Manifold Air Temp. ° F (° C)
Varies with Ambient Tempera-
ture
Throttle Position Volts .4 to .8 Volts
Throttle Angle 0-100 % 0-1%
MAP Volts or kPa
1-3 Volts or (45-55 kPa) (De-
pends on Vacuum and Baro
Pressure)
Baro Volts or kPa
3-5 Volts (Depends on Altitude
and Barometric Pressure)
Bat Volts 12.0-14.5 Volts
Spark Advance Degrees -10 to 30°
Knock Retard Degrees 0°
Idle Air Control IAC Counts (Steps) 0-40 Counts
Minimum IAC Position Counts (Steps) 0-40 Counts
Idle Air Control Follower Counts (Steps) 0 Counts
Injector Pulse Width msec. 2-3 msec.
Injector On Time Cranking msec.
2.5-3.5 msec. (Depends on
Water/Air Temperature)
Fuel Consumption GPH (L/h) 1-2 GPH (3.7-7.5 L/h)
Time From Start 0:00:00-1092:00 Varies
Memory Calibration Check
Sum
Calibration and Check Sum
Varies with Software revision
in ECM
Oil Press/IO Level (See Note) OK/LO OK
Engine Overtemp OK/Overheating OK
Lanyard Stop Mode OFF/ON OFF
NOTE: MCM will read I/O Level and MIE will read Trans.
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