Prins VSI CNG, Installation Manual

Page: 74 / 77

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. Swit
ch LED’s don’t lit up
Check the main fuse of the VSI system
Check i (VSI wire 13)
div. Fault codes when turning the ignition
off ( key out the ignition ) Caused by different switch off times between i and injector power.
Connect VSI wire 13 to the petrol injector feed instead of i.
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.