Control System Troubleshooting; Diagnostic Trouble Codes (Dts); Spn Codes - Generac Power Systems MAGNUM MTP4SZ Owner's Manual

Control System Troubleshooting

Symptom
Control system does not perform self
test
Control system shuts down
Display does not display data
Engine will not crank

Diagnostic Trouble Codes (DTS)

CANbus Diagnostic Trouble Codes are a pair of numbers:
the Suspect Parameter Number (SPN) and Failure Mode
Identifier (FMI). The SPN indicates the faulting subsystem
and the FMI identifies the type of failure.
SPN Description
51 Throttle Position
91 Accelerator Pedal Position
94 Fuel Delivery Pressure
98 Engine Oil Level
100 Engine Oil Pressure
110 Engine Coolant Temperature
111 Coolant Level
Owner's Manual for Wet-Prime Trash Pumps
Possible Cause
Faulty connection to battery
Faulty control system
Engine stop LED illuminated
Display lost power
Engine source address incorrect
Display address incorrect
Display configuration problem
CANbus failure
ECU not sending data
Fuel level/pressure low (SPN
524057)

SPN Codes

Standard SPN codes are defined by SAE J1939-71. Not
all standard codes are provided by ECUs. Manufacturers
may add additional SPN codes beyond the codes identified
in J1939-71. Contact a Deutz dealer or Generac Technical
Service for more information.
Table 6 - Typical SPN Codes
Troubleshooting
Solution
Correct battery connections
Repair or replace control system
Correct ECU stop condition, use
ECU diagnostics
Turn on key, verify display plugged
into harness
Change engine address in
Configuration
Change display address to 40
(default)
Reset display using Restore
Defaults
Check CANbus
Repair or replace ECU
Check fuel level
Check if fuel supply line is loose
Prime fuel system: Turn key to Start
position. Let pump run for 10-15
seconds. (May need to repeat.)
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