Section 1 EFI Engine Control Diagnostic Tests
Diagnostic Repair Manual 19
EFI Fault Code Diagnostics
Fault Indicator Light
When the EFI system is connected to a power source
(battery) and the generator is not running, the fault light
will turn on. Once the generator starts the fault light will
turn off. When a failure is detected, the fault light will flash
in a series of codes. The severity of the fault will
determine the flash code.
There are 3 failure levels:
• Level 1 will flash and the generator will run. There
may be a slight impact on performance.
• Level 2 will flash and the generator will shut down
if multiple errors are detected.
• Level 3 will shut down the generator.
IMPORTANT NOTE: If the Fault Indicator Light is
flashing 2/10 second on and 2/10 seconds off, this
indicates a low or dead battery fault. This sequence stays
on and takes precedent before other faults will be
displayed.
Table 1-2. Fault Codes
Fault
Code
Failure Description Fault Flash (seconds)
Failure
Level
2 TPS (Throttle Position Sensor) Failure On-0.25s, Off-0.5s, On-0.25s 3
3 Cylinder Head Temperature Failure On-0.25s, Off-0.5s Repeat 2X 2
4 Temperature failure On-0.25s, Off-0.5s Repeat 3X 2
5 Low system voltage On-0.25s, Off-0.5s Repeat 4X 3
6 High system voltage On-0.25s, Off-0.5s Repeat 5X 3
7 Cylinder temperature high On-0.25s, Off-0.5s Repeat 6X 1
8 Barometric pressure sensor failure On-0.25s, Off-0.5s Repeat 7X 1
9 Oil pressure abnormally low On-0.25s, Off-0.5s Repeat 8X 3
11 Fuel injector failure On-1.2s, Off-0.5s, On-0.25s 3
13 Fuel pump failure On-1.2s, Off-0.5s,(On-0.25s, Off-0.5s) Repeat 2X 3
15 Ignition failure On-1.2s, Off-0.5s,(On-0.25s, Off-0.5s) Repeat 4X 3
17 ECU internal failure On-1.2s, Off-0.5s,(On-0.25s, Off-0.5s) Repeat 6X 3
18 Crankshaft Position Sensor Failure On-1.2s, Off-0.5s,(On-0.25s, Off-0.5s) Repeat 7X 1
19 ECU reset On-1.2s, Off-0.5s, (On-0.25s, Off-0.5s) Repeat 8X 3
22 Engine over-speed failure (On-1.2s, Off-0.5s) Repeat 1X, (On-0.25s, Off-0.5s) Repeat 1X 3
24 Load Stability Sensor Failure (On-1.2s, Off-0.5s) Repeat 1X, (On-0.25s, Off-0.5s) Repeat 3X 1
27 Stepper motor binding (On-1.2s, Off-0.5s) Repeat 1X, (On-0.25s, Off-0.5s) Repeat 6X 3
28 Engine starting failure (On-1.2s, Off-0.5s) Repeat 1X, (On-0.25s, Off-0.5s) Repeat 7X 1
None Low Battery On-0.2s, Off-0.2s 0
Table 1-3. EFI Component Specifications
Battery Charge Coil
Open circuit voltage: 23V±5V
Load voltage: 14V ±1V
Oil Pressure Sensor 3-9 PSI (0.02-0.06MPa)
Crank Sensor Ohm Reading 270 ±20 Ω (@25°C)
Ignition Coil
Primary: 1.5Ω ±0.1Ω (@25°C)
Secondary: 5.8Ω ±0.6Ω (@25°C)
Injection Nozzle Ohm Reading 12Ω
Cylinder Head Temp Sensor 10K-3435
Stepper Motor 25Ω ±10%
Barometric Pressure Sensor 50-115kPa
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