Marine Power 5.3 GEN V DI Owner's Manual page 33

11.
Engine Diagnostics and Codes
Name Description
Oil Temperature Warning Sensor alerts ECM if engine oil temperature is above 300° F.
Oxy Fuel Trim ECM sets code after detecting abnormally rich or lean condition.
Oxy Heater ECM sets code after detecting failure in O2 sensor heaters.
Oxy Response ECM sets code after determining O2 sensor response is slow.
Oxy Voltage ECM sets code after detecting abnormal voltage at O2 sensors.
Powertrain Relay ECM detects abnormal relay contact voltage.
Supercharger Inlet Pressure Sensor Supercharger inlet pressure too high or too low.
Shift Interrupt
Slow Mode Lamp
Speed Based Output
Speed Sensor ECM sets code if speed sensor fails diagnostic test.
Starter Relay Driver
SVS Lamp ECM detects issue with SVS circuit.
System Voltage ECM sets code if system voltage is below 10 or above 16.
Tachometer
Tiap Sensor
5V Buffer ECM detects out of range voltage on low voltage output pins.
Var Gov
www.MarinePowerUSA.com
Trouble MIL Buzzer Reduce
Code Lamp RPM
175 X X
65565-66 X
66019-22 X
65567-68 X
65561-64 X
66013-14 X
3563 X
66026
66010
66011
84 X
66002
66004 X
627 X
66018
3562
65620-23 X
65690
Comments
Reduces RPM to 2500. Not used on 5.7 Engines.
65 indicates odd bank, 66 even bank.
19 = pre-o2 odd bank, 20 = pre-o2 even bank, 21 = post-o2 odd
bank, 22 = post-o2 even bank.
67 indicates odd bank, 68 even bank.
61 = pre-o2 odd bank, 62 = post-o2 odd bank, 63 = pre-o2 even
bank, 64 = post-o2 even bank.
Only applicable on supercharged engines.
Not normally used in jet or repower applications. Used in
Towboat applications.
This circuit controls the warning buzzer alarm.
Check alternator connections and for tight belt. May need
replacement.
Used to supply voltage to engine sensors. It is a 5 volt reference.
31