ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5E-5190-823225--1 1096
Diagnostic Circuit Check
The Diagnostic Circuit Check is an organized ap-
proach to identifying a problem created by an elec-
tronic engine control system malfunction. It must be
the starting point for any driveability complaint diag-
nosis because it directs the service technician to the
next logical step in diagnosing the complaint.
NOTE: A scan tool that displays faulty data should
not be used, and the problem should be reported to
the manufacturer. The use of a faulty scan tool can
result in misdiagnosis and unnecessary parts re-
placement.
The scan tool data listed in the table may be used for
comparison. After completing the diagnostic circuit
check and finding the on-board diagnostics function-
ing properly and no trouble codes displayed. The
“Typical Data Values” are an average of display val-
ues recorded from normally operating vessels and
are intended to represent what a normally functioning
system would typically display.
Only the parameters listed below are used in this
manual for diagnosing. If a scan reads other parame-
ters, the values are not recommended for use in diag-
nosing. If all values are within the range illustrated,
refer to “Troubleshooting.”
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 Temperature
Throttle Position Volts .4 to .8 Volts
Throttle Angle 0-100 % 0-1%
MAP Volts or kPa
1-3 Volts or (45-55 kPa) (Depends 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
Power Reduction Mode OFF/ON OFF
Lanyard Stop Mode OFF/ON OFF
NOTE: MCM will read I/O Level and MIE will read Trans.
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