Prins VSI LPG - Troubleshooting and Maintenance; LPG Trouble Code Chart

73
Trouble code chart LPG
Trouble code
Definition
Check / solution
100
Lambda to long to rich.
Check when operating on petrol and LPG that there is good lambda signal
movement.
101
Lambda to long to lean.
Check when operating on petrol and LPG that there is good lambda signal
movement.
102
Lambda to long to lean during open
loop.
Check when operating on petrol and LPG that there is good lambda signal
movement.
110
T-ECT>= 171°C
Check if the ECT sensor (blue) in the reducer is connector is connected to
ground.
111
T-ECT>= -40°C
Check if the ECT sensor (blue) in the reducer has a power connection.
120
T-LPG>= 171°C
Check the ground connection of the Pressure/temperature sensor in the filter
unit.
121
T-LPG>= -40°C
Check the power connection of the Pressure/temperature sensor in the filter
unit.
150
Psys<= Low_Level
Based on a pressure drop in the system, this can be caused by an empty LPG
tank, incorrect solenoid valve, polluted filter or incorrectly adjusted pressure.
160
ECM-VSI not activated
Activate the LPG computer with the diagnostic program, using the F11 function
key.
180
T-Board >= 90°C
LPG computer circuit board to hot, replace the VSI computer in a cooler area.
181
Battery voltage to high
Check board voltage / alternator output and condition of the battery.
210-220-230-240-250-260-270-280
VSI injector
overload
Injector current to high, check for short circuiting
211-221-231-241-251-261-271-281
VSI injector
noload
Injector current to low, check for bad connections.
310
Adjusted pressure on idle out of range
Adjust the idle pressure to the value shown by parameter “ Idle Level “
311
Programm error during flahing the
memory
Check parameter settings, contact Prins Autogassystemen.
320
Psys voltage to low
Check the ground connection of the Pressure/temperature sensor in the filter
unit.
321
Psys voltage to high
Check the power connection of the Pressure/temperature sensor in the filter
unit.
322
Psys > 3,5 Bar
Check the coolant temperature (T-ect) and the evaporator for leakage of the
first stage.
330
unexpected parameter change
Contact Prins Autogassystemen.
340
reducer warms up to slow
Check the water connections / circuit.
341
Gas leakage, system pressure is less then
1.25 bar after 4 hours when the engine is
not running
Check the system for gas leakage.
div.
System switches to LPG but engine
stalls immediately.
LPG tank empty ?
Lock-off valves open ?
div.
No injection timing on LPG ( 0 Msec.)
Check the injection module.
div.
The LPG system switches constantly
between LPG and Petrol
- Check coolant system for air.
- T-ect sensor in the evaporator malfunction.
div.
Engine hesitates on high revs, and not
running on all cylinders. Engine runs
good on idle.
Check for kinked or jammed LPG hoses (between VSI injector and couplings).
Check for blocked inlet couplings.
div.
Switch LED’s don’t lit up
Check the main fuse of the VSI system
Check ignition+ (VSI wire 13)
div.
Fault codes when turning the ignition
off ( key out the ignition )
Caused by different switch off times between ignition+ and injector power.
Connect VSI wire 13 to the petrol injector feed instead of ignition+.
div.
The orange LED on the switch flashes
Activate the LPG computer with the diagnostic program, using the F11 function
key.
div.
The LPG system switches to LPG but
engine stalls immediately
LPG tank empty?
div.
Not running on all cylinders on lpg
Check parameter 10, number of cylinders.
div.
No injection times on lpg
Check the connections of the injection module.
div.
Injection time “falls” to 0 mSec on
LPG
Check the injection module.
div.
Check engine while running on LPG,
injector circuit malfunction, no lambda
control (limb home)
Replace injection module
div.
Not starting / running on petrol
Check the connections of the injection module.