RENAULT SCENIC 2008 J84 / 2.G Gas Injection LPG 3000 Workshop Manual

17C-101
MR-372-J84-17C000$944.mif
V2
GAS INJECTION
Fault finding - Fault finding chart (ALP)
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
ALP 2
CONTINUED 1
For Logan
IMPORTANT
When carrying out an operation on an LPG supply circuit component, consult the safety instructions
(see 17D, Gas injection, Introduction, Safety instructions for all operations).
NOTESAsk the customer if the problem always arises.
If it is not the case, do not replace the sensor, as it is not the cause.
Is the fault that the tank is not displaying full when it has just been filled with LPG?
Check that the tank has just been filled with LPG, otherwise refill it.
If the customer complaint is reproduced, continue fault finding.
If not, the fault does not always arise. Do not replace the sensor and deal
with the next customer complaint.
Disconnect the connector from the LPG tank sender and measure
the resistance between tracks A1 and A.
Replace the LPG tank sender if the resistance value is less than 5 kOhms,
because the sensor is incorrect.
If the fault is still present, contact the Techline.
Is the fault related to the LPG warning not being displayed when the tank is empty?
NOYES
YES
A
AFTER REPAIRCheck using the diagnostic tool.

17C-102
MR-372-J84-17C000$944.mif
V2
GAS INJECTION
Fault finding - Fault finding chart (ALP)
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
ALP 2
CONTINUED 2
Check that the tank is empty, otherwise empty it by going for a drive.
If the customer complaint is reproduced, continue fault finding.
If not, the fault does not always arise. Do not replace the sensor and deal with the next customer complaint.
Disconnect the connector from the LPG tank sender and measure the resistance between tracks A1 and A.
Replace the LPG tank sender if the resistance value is greater than 2.1 kOhms, because the sensor is incorrect.
If the fault is still present, contact the Techline.
A
YES
AFTER REPAIRCheck using the diagnostic tool.

17C-103
MR-372-J84-17C000$944.mif
V2
GAS INJECTION
Fault finding - Fault finding chart (ALP)
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
ALP 3 The engine stalls when switched to LPG mode
IMPORTANT
When carrying out an operation on an LPG supply circuit component, consult the safety instructions
(see 17D, Gas injection, Introduction, Safety instructions for all operations).
NOTESCheck that there is LPG in the tank.
Check the condition of the air filter.
Replace the filter if necessary.
Check that the LPG supply pipes are not pinched or crushed.
Replace the faulty pipes if necessary.
Check the expansion valve cooling circuit (see MR 364 Mechanics, 17D, LPG injection, Expansion valve).
Repair the circuit if necessary.
Measure the resistance between tracks 1 and 2 of the injectors.
Replace the injectors if their resistance value at approximately 20°C is not between:
0.77 Ω < R < 1.43 Ω
Check the following connections for insulation from earth, continuity and absence of extraneous
resistance:
Main relay track 5
Main relay track 5
Main relay track 5
Main relay track 5track 1of injector 1
track 1of injector 2
track 1of injector 3
track 1of injector 4
Check the insulation from + 12 V, the continuity and the absence of interference resistance of
the connections between:
LPG computer track G3
LPG computer track G4
LPG computer track H2
LPG Computer track H3track 2 of injector 1
track 2 of injector 2
track 2 of injector 3
track 2 of injector 4
If necessary, repair the defective connections.
AFTER REPAIRCheck using the diagnostic tool.
GAZ3000_V08_ALP3 / GAZ3000_V10_ALP3

17C-104
MR-372-J84-17C000$944.mif
V2
GAS INJECTION
Fault finding - Fault finding chart (ALP)
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
ALP 3
CONTINUED
Test the operation of the injectors.
Run commands AC018 Cylinder 4 injector, AC019 Cylinder 3 injector, AC020 Cylinder 2 injector
and AC021 Cylinder 1 injector.
Run the engine in petrol mode.
Disconnect the LPG tank connector and switch to LPG mode.
Check for + 12 Von track 1 of the LPG tank relay connector.
Repair if necessary.
Check for earth on track 2 of the LPG tank relay connector.
Repair if necessary.
Measure the resistance between tracks A4 and A5 (for Mégane 2) or tracks 1 and 2 (for Logan) of the LPG
tank solenoid valve.
Replace the solenoid valve if the resistance value is not approximately 12.6 Ω.
AFTER REPAIRCheck using the diagnostic tool.

17C-105
MR-372-J84-17C000$944.mif
V2
GAS INJECTION
Fault finding - Fault finding chart (ALP)
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
ALP 4 Idle speed faults
IMPORTANT
For any operation on a component of the LPG supply circuit, consult the safety instructions (see 17D,
LPG injection, Introduction, Safety instructions for all operations).
NOTESCheck that there is no fault in petrol mode.
Check that there is LPG in the tank.
Check that hoses are not blocked or pinched (especially after removal operations).
Repair the faulty component or components.
Check the condition of the air filter.
Replace the air filter if necessary.
Check the expansion valve cooling circuit (see MR 364 Mechanical, 17D, LPG injection, Expansion valve).
Repair the circuit if necessary.
Check the conformity of the spark plugs.
Replace the filter if necessary.
Test the operation of the injectors.
Run and interpret commands AC018 Cylinder 4 injector, AC019 Cylinder 3 injector, AC020 Cylinder 2
injector and AC021 Cylinder 1 injector.
AFTER REPAIRCheck using the diagnostic tool.
GAZ3000_V08_ALP4 / GAZ3000_V10_ALP4

17C-106
MR-372-J84-17C000$944.mif
V2
GAS INJECTION
Fault finding - Fault finding chart (ALP)
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
ALP 5 Faults occurring while driving
IMPORTANT
When carrying out an operation on an LPG supply circuit component, consult the safety instructions
(see 17D, Gas injection, Introduction, Safety instructions for all operations).
NOTESCheck that there is no fault in petrol mode.
Check that hoses are not blocked or pinched (especially after removal operations).
Repair the faulty component or components.
Check the condition of the air filter.
Replace the air filter if necessary.
Check the expansion valve cooling circuit (see MR 364 Mechanical, 17D, LPG injection, Expansion valve).
Repair the circuit if necessary.
Check the conformity of the spark plugs.
Replace the filter if necessary.
Test the operation of the injectors.
Run and interpret commands AC018 Cylinder 4 injector, AC019 Cylinder 3 injector, AC020 Cylinder 2
injector and AC021 Cylinder 1 injector.
AFTER REPAIRCheck using the diagnostic tool.
GAZ3000_V08_ALP5 / GAZ3000_V10_ALP5

17C-107
MR-372-J84-17C000$944.mif
V2
GAS INJECTION
Fault finding - Fault finding chart (ALP)
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
ALP 6 LPG leak
IMPORTANT
For any operation on a component of the LPG supply circuit, consult the safety instructions (see 17D,
LPG injection, Introduction, Safety instructions for all operations).
NOTESNone.
Open the plastic cover on the filler neck.
Check that the filler neck is in good condition.
Change the filler spigot if necessary.
Check that there are no leaks along the pipe that runs from the filler spigot to the LPG tank.
(Fill up with LPG to carry out this operation).
Repair the pipe if necessary.
AFTER REPAIRCheck using the diagnostic tool.
GAZ3000_V08_ALP6 / GAZ3000_V10_ALP6