Efi Fault Code Diagnostics - Generac Power Systems XT-EFI Series Manual

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.
Fault
Failure Description
Code
2 TPS (Throttle Position Sensor) Failure
3 Cylinder Head Temperature Failure
4 Temperature failure
5 Low system voltage
6 High system voltage
7 Cylinder temperature high
8 Barometric pressure sensor failure
9 Oil pressure abnormally low
11 Fuel injector failure
13 Fuel pump failure
15 Ignition failure
17 ECU internal failure
18 Crankshaft Position Sensor Failure
19 ECU reset
22 Engine over-speed failure
24 Load Stability Sensor Failure
27 Stepper motor binding
28 Engine starting failure
None Low Battery
Diagnostic Repair Manual
Table 1-2. Fault Codes
Table 1-3. EFI Component Specifications
Battery Charge Coil
Oil Pressure Sensor
Crank Sensor Ohm Reading
Ignition Coil
Injection Nozzle Ohm Reading
Cylinder Head Temp Sensor
Stepper Motor
Barometric Pressure Sensor
Section 1 EFI Engine Control Diagnostic Tests
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.
Fault Flash (seconds)
On-0.25s, Off-0.5s, On-0.25s
On-0.25s, Off-0.5s Repeat 2X
On-0.25s, Off-0.5s Repeat 3X
On-0.25s, Off-0.5s Repeat 4X
On-0.25s, Off-0.5s Repeat 5X
On-0.25s, Off-0.5s Repeat 6X
On-0.25s, Off-0.5s Repeat 7X
On-0.25s, Off-0.5s Repeat 8X
On-1.2s, Off-0.5s, On-0.25s
On-1.2s, Off-0.5s,(On-0.25s, Off-0.5s) Repeat 2X
On-1.2s, Off-0.5s,(On-0.25s, Off-0.5s) Repeat 4X
On-1.2s, Off-0.5s,(On-0.25s, Off-0.5s) Repeat 6X
On-1.2s, Off-0.5s,(On-0.25s, Off-0.5s) Repeat 7X
On-1.2s, Off-0.5s, (On-0.25s, Off-0.5s) Repeat 8X
(On-1.2s, Off-0.5s) Repeat 1X, (On-0.25s, Off-0.5s) Repeat 1X
(On-1.2s, Off-0.5s) Repeat 1X, (On-0.25s, Off-0.5s) Repeat 3X
(On-1.2s, Off-0.5s) Repeat 1X, (On-0.25s, Off-0.5s) Repeat 6X
(On-1.2s, Off-0.5s) Repeat 1X, (On-0.25s, Off-0.5s) Repeat 7X
On-0.2s, Off-0.2s
Open circuit voltage: 23V±5V
Load voltage: 14V ±1V
3-9 PSI (0.02-0.06MPa)
270 ±20 Ω (@25°C)
Primary: 1.5Ω ±0.1Ω (@25°C)
Secondary: 5.8Ω ±0.6Ω (@25°C)
12Ω
10K-3435
25Ω ±10%
50-115kPa
Failure
Level
3
2
2
3
3
1
1
3
3
3
3
3
1
3
3
1
3
1
0
19