ABS RENAULT SCENIC 2008 J84 / 2.G Gas Injection LPG 3000 Owner's Manual

17C-77
MR-372-J84-17C000$590.mif
V2
17C
GAS INJECTION
Fault finding - Interpretation of statuses
ET022
WAITING FOR LPG CONDITIONS
YES
NO
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).
NOTESThere must be no present or stored faults.
Ignition on, engine stopped.
Status ET022 indicates YES for a variable period during which the computer checks that the LPG system is
operating correctly.
Variable duration depending on:
–ET100 LPG system ready,
–PR002 Coolant temperature,
–PR103 Air temperature,
–PR113 LPG temperature.
Apply the interpretation of faults DF103 LPG expansion valve solenoid valve circuit and DF007 Main relay
circuit.
Manipulate the wiring harness between the LPG computer and the petrol computer until a change in status is
noted.
Check the insulation, continuity and the absence of interference resistance on the connections between:
For Mégane 2:
LPG computer track A1
LPG computer track A2
For Logan:
LPG computer track A1
LPG computer track A2track K3, connector B, petrol computer
track K4, connector B, petrol computer
track 25 of the fuel computer
track 26 of the fuel computer
Repair if necessary.
If the status is still not correct, contact the Techline.
AFTER REPAIRFollow the instructions to confirm repair.
GAZ3000_V08_ET022 / GAZ3000_V10_ET022
LPG 3000
Program No.
Vdiag No: 08/10
MR-372-J84-17C000$590.mif

17C-78
MR-372-J84-17C000$590.mif
V2
GAS INJECTION
Fault finding - Interpretation of statuses
LPG 3000
Program No.
Vdiag No: 08/10
17C
ET023
FORCED PETROL MODE, FAULTY LPG
YES
NO
NOTESThere must be no present or stored faults.
Ignition on, engine stopped.
Status ET023 indicates YES if a fault is detected in LPG mode when LPG mode is selected.
Check the insulation, continuity and absence of interference resistance on the connections between:
For Mégane 2:
LPG computer track A1
LPG computer track A2
For Logan:
LPG computer track A1
LPG computer track A2track K3, connector B, petrol computer
track K4, connector B, petrol computer
track 25 of the fuel computer
track 26 of the fuel computer
Repair if necessary.
If the status is still not correct, contact the Techline.
AFTER REPAIRFollow the instructions to confirm repair.
GAZ3000_V08_ET023 / GAZ3000_V10_ET023

17C-85
MR-372-J84-17C000$708.mif
V2
GAS INJECTION
Fault finding - Interpretation of parameters
LPG 3000
Program No.
Vdiag No: 08/10
17C
PR007
LPG TANK SENDER SIGNAL VOLTAGE
NOTESThere must be no present or stored faults.
Ignition on, engine stopped.
Using the LPG tank sender signal voltage value PR007 and measure the resistance, using a multimeter between
tracks A and C (for Mégane 2 ) or tracks A1 and A2 (for Logan).
Check the consistency between these values using the table below.
In the event of inconsistency, check for earth on track D or C (for Mégane 2 ) or track 3 or 4 (for Logan) of LPG
tank pressure sensor connector.
Repair if necessary.
Check the insulation against earth, continuity and the absence of interference resistance of the connections
between:
For Mégane 2:
LPG computer track A4
LPG computer track D3
For Logan:
LPG computer track B2
LPG computer track D3track A of the LPG tank sender
track C of the LPG tank sender
track A2 of the LPG tank sender
track A1 of the LPG tank sender unit
Repair if necessary.
Pressure sensor voltage
in V (± 0.5 V)Needle position
4Full
1Reserve
0Empty
AFTER REPAIRFollow the instructions to confirm repair.
GAZ3000_V08_PR007 / GAZ3000_V10_PR007

17C-86
MR-372-J84-17C000$708.mif
V2
GAS INJECTION
Fault finding - Interpretation of parameters
LPG 3000
Program No.
Vdiag No: 08/10
17C
PR112
LPG PRESSURE DOWNSTREAM OF EXPANSION VALVE
NOTESThere must be no present or stored faults.
Ignition on, engine stopped.
Check that the LPG pressure downstream of the expansion valve is not more than 800 mbar greater than the
manifold pressure PR001 Manifold pressure.
Check the pressure value using parameters PR001 Manifold pressure, PR003 Pressure difference:
LPG/manifold and PR112 LPG pressure downstream of expansion valve and ensure that
PR003 = PR112 - PR001.
If the fault is still present, manipulate the wiring harness between the LPG computer and the LPG pressure/
temperature sensor to produce a status change.
Check the connection and condition of the LPG pressure/temperature sensor and its connections.
If necessary, repair or replace the connector.
Check for + 5V on track 1 (for Mégane 2) or track 3 (for Logan) of the LPG pressure/temperature sensor in LPG
mode. 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 A3
For Logan:
LPG computer track A3track 1 of the LPG temperature/pressure sensor
track 3 of the LPG temperature/pressure sensor
Repair if necessary.
Check for earth on track 3 (for Mégane 2) or track 1 (for Logan) of the LPG pressure/temperature sensor in
LPG mode.
Check the insulation in relation to + 12V and the continuity and absence of interference resistance on
the connection between:
For Mégane 2:
LPG computer track B3
For Logan:
LPG computer track B3track 3 of the LPG temperature/pressure sensor
track 1 of the LPG temperature/pressure sensor
Repair if necessary.
AFTER REPAIRFollow the instructions to confirm repair.
GAZ3000_V08_PR112 / GAZ3000_V10_PR112

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