Fault Information - Mercury 25 EFI Service Manual

CDS G3 Diagnostic Tool Kit
The Pinpoint Diagnostics (when applicable) allows the technician to identify the cause of a fault code down to the component
level. Pinpoint Diagnostic test results can be stored in the CDS.
Fault codes can be displayed active or historic. The Fault Status displays the code number, description, and the source of the
faults. Fault Hours displays a fault number and text that corresponds to the exact moment in the engines' run history the fault
was set.
When the 84‑899150T01 diagnostic cable is plugged into the ECM diagnostic port, a special service mode is activated within
the ECM. When the special service mode is activated, the ECM will not log run time, nor will it allow any fault hours to be set.
Any previously logged run time and fault hours can be reviewed for diagnostic purposes, but the run time will not increase and
no new fault hours can be set when the ECM is in the service mode. During a water test, the data stream and any faults that
occur during the water test, will be recorded. The water test does not affect the logging of faults, run history, or system
information.
The diagnostic cable connection supplies power to the ECM. Disconnecting sensors and actuators while the ECM is powered
up in the special service mode, will cause faults to be displayed in the faults status screen. These faults will not be recorded in
the memory fault hours. The CDS will not clear (erase) faults hours at the time of this service manual printing.
The System Information screen will display an alpha‑numeric code identifying a specific calibration in the ECM.

Fault Information

CDS Screen
Fault Status ‑ Active Faults
CDS Screen
Engine Speed
Baro Pressure
Manifold Pressure
Throttle Position
Ignition Timing
Data List IAC Duty Cycle
Engine Coolant Temperature Cylinder block water temperature.
Fuel Flow Rate
INJ Pulse Width
Low Oil Pressure Switch
90-8M0105568 eng MARCH 2016
Display
ACG Coil 1, 2, 3
IGN 1, 2, 3
INJ 1, 2, 3
Fuel Pump Circuit
ISC
Throttle Position Sensor
Intake Temperature Sensor Intake temperature sensor fault code #13.
Water Temperature Sensor Water temperature sensor fault code #14.
Pressure Sensor
Oil Pressure Sensor
Display
ACG Stator voltage driving the engine operating systems
Engine RPM
The amount of voltage the ECM is receiving through the engine stator or
Driver Power
diagnostic cable.
Ambient air pressure.
May be referred to as MAP (Manifold Absolute Pressure).
Percentage of throttle angle.
Ignition timing displayed in degrees BTDC.
ISC (Idle Speed Control) activation percentage 0 ‑ 100%.
Amount of calculated fuel consumption.
Fuel injector activation duration ms (milliseconds).
Low oil pressure displayed in the CDS as:
•
•
Ignition key is OFF, lanyard stop switch active: displayed in the CDS as ON.
Stop Switch
Ignition key is ON, lanyard stop switch is open: displayed in the CDS as OFF.
Fault Information
ACG Coil faults #1 through #3
Ignition coil fault code #4 through #6.
Fuel injector fault code #7 through #9.
High pressure fuel pump fault code #10
(Idle Speed Control) Fault code #11. May be referred to as IAC (Idle
Air Control).
Throttle position sensor fault code #12.
Pressure sensor fault code #15. May be referred to as MAP
(Manifold Absolute Pressure).
Oil pressure sensor fault code #16.
Data Stream Information
Engine running ON (adequate oil pressure)
Engine not running OFF (low oil pressure)
© 2016 Mercury Marine
8M0114141
Description
Description
Ignition
Page 2A-5