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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