2008 RENAULT SCENIC ABS

17C-87
MR-372-J84-17C000$708.mif
V2
GAS INJECTION
Fault finding - Interpretation of parameters
LPG 3000
Program No.
Vdiag No: 08/10
17C
PR112
CONTINUED
Check the insulation, continuity and the absence of interference resistance on the connection between:
For Mégane 2:
LPG computer track C4
For Logan:
LPG computer track C3
LPG computer track E2track 2 of the LPG pressure/temperature sensor
track 4 of the LPG pressure/temperature sensor
track 2 of the LPG pressure/temperature sensor
Repair if necessary.
If the fault is still present, replace the LPG pressure/temperature sensor.
If the fault is still present, check the expansion valve (see MR 364 Mechanical, 17D, LPG injection).
AFTER REPAIRFollow the instructions to confirm repair.

17C-90
MR-372-J84-17C000$826.mif
V2
17C
GAS INJECTION
Fault finding - Interpretation of commands
AC005
FUEL TANK SENDER RELAY
NOTESWith ignition on and engine stopped.
Switch on the ignition and run command AC005.
If the fuel sender relay does not click 10 times, carry out the fault finding procedure below.
Check the insulation, continuity and the absence of interference resistance on the connection between:
For Mégane 2:
LPG computer track E4
Fuel sender relay track B2
For Logan:
LPG computer track E4
Double relay control unit track B2Earth
Earth
Repair if necessary.
Check the insulation, continuity and the absence of interference resistance on the connection between:
For Mégane 2:
Fuel sender relay track B3
For Logan:
Double relay control unit track B3track B5 of the fuel sender relay
track B5 of the fuel pump relay
Repair if necessary.
If the fault is still present, replace the fuel sender relay (see MR 364 Mechanics, 17D, LPG injection).
AFTER REPAIRRepeat the conformity check from the start.
GAZ3000_V08_AC005 / GAZ3000_V10_AC005
LPG 3000
Program No.
Vdiag No: 08/10
MR-372-J84-17C000$826.mif

17C-91
MR-372-J84-17C000$826.mif
V2
GAS INJECTION
Fault finding - Interpretation of commands
LPG 3000
Program No.
Vdiag No: 08/10
17C
AC015
TANK SOLENOID VALVE
NOTESWith ignition on and engine stopped.
Switch on the ignition and run command AC015.
If the tank solenoid valve does not click ten times, carry out the fault finding procedure below.
Look for possible damage to the harness, and check the condition and connection of the LPG tank solenoid
valve and its connectors.
Repair if necessary.
Check the connection and condition of the LPG solenoid valve connector and its connections.
Replace the connector if necessary.
Check for +12 V on track 1 of the LPG tank relay and track C2 of the LPG computer.
Repair if necessary.
With the ignition on, check for earth on track 2 of the LPG tank solenoid valve relay.
If, with the ignition on, the computer does not control the LPG tank solenoid valve relay on track 2 through an
earth, contact the Techline.
–Check that the solenoid valve is supplied with +12 V by track E4 of the LPG computer.
If necessary, check the insulation, continuity and the absence of interference resistance on the connection
between:
For Mégane 2:
LPG computer track E4
For Logan:
LPG computer track E4track 2 of the LPG tank relay
track B2 of the double relay control unit
Repair if necessary.
AFTER REPAIRRepeat the conformity check from the start.
GAZ3000_V08_AC015 / GAZ3000_V10_AC015

17C-92
MR-372-J84-17C000$826.mif
V2
GAS INJECTION
Fault finding - Interpretation of commands
LPG 3000
Program No.
Vdiag No: 08/10
17C
AC015
CONTINUED
–Check for +12 V on track 5 of the LPG tank relay.
If necessary, check the following connections for insulation from earth, continuity and absence of extraneous
resistance:
For Mégane 2:
LPG computer track E3
LPG tank solenoid valve track D
For Logan:
LPG computer track E3
LPG tank solenoid valve track 1track 5 of the LPG tank relay
track B5 of the double relay control unit
Repair if necessary.
Check for earth on track E (for Mégane 2) or on track 2 (for Logan) of the LPG tank solenoid valve.
Repair if necessary.
With the engine running, check that the LPG tank solenoid valve clicks when the LPG mode is selected.
If the fault is still present, replace the LPG tank solenoid valve (see MR 364 Mechanics, 17D, LPG
injection).
AFTER REPAIRRepeat the conformity check from the start.

17C-99
MR-372-J84-17C000$944.mif
V2
17C
GAS INJECTION
Fault finding - Fault finding chart (ALP)
ALP 1 No dialogue with the computer
NOTESNone.
Check for a + 12 V battery feed on track H4 and a + 12 V after ignition feed (using the forced + after ignition
mode, see Introduction section) on track C2 of the LPG computer.
Repair if necessary.
Check the condition of the battery and the vehicle earths.
Repair if necessary.
Try the diagnostic tool on another vehicle.
–check the connection between the diagnostic tool and the diagnostic socket (lead in good condition),
–check fuse F5 (15 A) (for Mégane 2) and fuses F04 (10A) and F29 (15A) (for Logan).
Repair if necessary.
Check the insulation, continuity and the absence of interference resistance on the connections between:
LPG computer track H1
LPG computer track G1
LPG computer track B4Earth
Earth
track 7 of the diagnostic socket
Repair if necessary.
Use the diagnostic socket to check the following tracks:
Track 1
Track 16
Tracks 4 and 5+ After ignition
+ Battery
Earth
Repair if necessary.
AFTER REPAIRCheck using the diagnostic tool.
GAZ3000_V08_ALP1 / GAZ3000_V10_ALP1
LPG 3000
Program No: AB
Vdiag No: 08/10
MR-372-J84-17C000$944.mif

17C-100
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 LPG sender fault
For Mégane II
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.
Disconnect the LPG tank sender connector and check the voltage of the sensor signal using parameter
PR007 LPG tank sender signal voltage.
Replace the sensor if the signal voltage is not approximately:4.8 V tank full
1 V in reserve
0.2 V tank empty
Check for earth on track C (for Mégane 2) of the LPG tank connector.
Repair if necessary.
Check the insulation in relation to earth and the continuity and the absence of interference resistance on
the connection between:
For Mégane 2:
LPG computer track B1 track B of the LPG tank sender
If the fault is still present, check the intermediate connectors (R2 track 36 and R34 track 34 for Mégane 2).
Repair if necessary.
If the fault is still present, check the LPG tank pressure sensor (see MR 364 Mechanical, 17D, LPG injection).
AFTER REPAIRCheck using the diagnostic tool.
GAZ3000_V08_ALP2 / GAZ3000_V10_ALP2

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