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

17C-34
MR-372-J84-17C000$354.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF031
PRESENT
LPG PRESSURE DOWNSTREAM OF EXPANSION VALVE
1.DEF: Signal incoherent
2.DEF: Signal outside lower limit
3.DEF: Signal outside upper limit
4.DEF: Non-compliance with emission control standards
NOTESNone.
Manipulate the wiring harness between the LPG computer and the LPG tank pressure sensor in order to produce
a change in status (present ↔ stored).
Look for any damage to the wiring harness and check the connection and condition of the LPG pressure sensor
downstream of the expansion valve and its connections.
If necessary, repair or replace the connector.
With the engine off, switch on LPG mode and check that the sender is not at minimum.
If necessary, put some LPG back into the tank.
Check that parameter PR112 LPG pressure downstream of the expansion valve is no more than 800 mbar
greater than the manifold pressure parameter 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.
Check that the LPG supply pipes are not pinched or crushed.
Replace the faulty pipes if necessary.
If the fault is still present, deal with the other faults, then proceed to the conformity check.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
GAZ3000_V08_DF031P / GAZ3000_V10_DF031

17C-35
MR-372-J84-17C000$354.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF061
PRESENT
OR
STOREDMULTIPLEX NETWORK
1.DEF: No multiplex frames or values invalid (fault on the computer producing
the signal or a CAN connection fault)
2.DEF: Non-compliance with emission control standards
NOTESNone.
Check the insulation and continuity on the wires of the following multiplex connections:
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 petrol computer
track 26 of the petrol computer
Repair if necessary.
Run a multiplex network test (see 88B, Multiplex).
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
GAZ3000_V08_DF061 / GAZ3000_V10_DF061

17C-36
MR-372-J84-17C000$354.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF074
PRESENT
OR
STOREDTDC SIGNAL CIRCUIT
1.DEF: Signal incoherent
2.DEF: Non-compliance with emission control standards
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present following signal incoherence.
Appearance conditions:
The fault appears when the difference between the engine speed of the petrol
computer sent by a wire connection and the engine speed sent by the multiplex
network is greater than 300 rpm.
Manipulate the wiring between the LPG computer and the petrol computer in order to produce a change in status
(present ↔ stored).
Look for any damage to the wiring harness and check the connection and condition of the TDC sensor and its
connections.
If necessary, repair or replace the connector.
Check the insulation, continuity and the absence of interference resistance on the connection between:
For Mégane 2:
LPG computer track F1
For Logan:
LPG computer track F1track C3, connector B, of the petrol computer
track 41, connector C12, of the petrol computer
Check the insulation and continuity on the wires of the following multiplex connections:
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 petrol computer
track 26 of the petrol computer
Repair if necessary.
If the fault is still present, deal with the other faults, then proceed to the conformity check.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
GAZ3000_V08_DF074 / GAZ3000_V10_DF074

17C-37
MR-372-J84-17C000$354.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF080
PRESENT
BATTERY VOLTAGE
1.DEF: Battery undervoltage
2.DEF: Battery voltage too high
3.DEF: Non-compliance with emission control standards
NOTESSpecial note:
The fault is declared present if the voltage value is not between:
6V < Vbatt < 16V
Check the condition of the battery and the charging circuit.
Check the condition of the vehicle earths.
Check for + 12V on track H4 and C2 of the LPG computer.
Repair if necessary.
Check for earth on tracks G1 and H1.
Repair if necessary.
If the fault is still present, deal with the other faults, then proceed to the conformity check.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
GAZ3000_V08_DF080 / GAZ3000_V10_DF080

17C-38
MR-372-J84-17C000$354.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF081
PRESENT
OR
STOREDCYLINDER 2 INJECTOR CIRCUIT
CO.0: Open circuit or short circuit to earth
CC.1: Short circuit to + 12 Volts
1.DEF: Non-compliance with emission control standards
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).
NOTESPriority when dealing with a number of faults:
If fault DF021 LPG tank solenoid valve relay circuit is present or stored, deal with
this fault first.
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present after the engine is started and switched to LPG mode
or when command AC020 Cylinder 2 injector is executed.
Manipulate the wiring harness between the LPG computer and Injector number 2 until there is a change in status.
(present ↔ stored).
Look for any damage to the wiring harness and check the connection and condition of injector 2 and its
connections.
If necessary, repair or replace the connector.
Measure the resistance of injector 2 between tracks 1 and 2.
Replace the injector if the resistance value of the injector at approximately 20°C is not between:
0.7 Ω < R < 1.45 Ω
Check for insulation against earth, continuity and absence of interference resistance for the following
connections:
For Mégane 2:
General relay track A5
Black intermediate connector (R37) track 6
LPG computer track G4
Black intermediate connector (R37) track 2
For Logan:
Injector 2 track 1
LPG computer track G4track 6 of the black intermediate connector (R37)
track 1of injector 2
track 2 of the black intermediate connector (R37)
track 2 of injector 2
track A1 of the double control relay unit
track 2 of injector 2
Repair if necessary.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
GAZ3000_V08_DF081 / GAZ3000_V10_DF081

17C-39
MR-372-J84-17C000$354.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF081
CONTINUED
With the ignition on,
–check for + 12V on track 1 of injector 2,
–check for earth on track 2 of injector 2 when command AC020 Cylinder 2 injector is run.
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.

17C-40
MR-372-J84-17C000$354.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF083
PRESENT
OR
STOREDLPG PRESSURE SENSOR CIRCUIT
CC.0: Short circuit to earth
CO.1: Open circuit or short circuit to + 12V
1.DEF: Non-compliance with emission control standards
NOTESNone
Special note:
The fault is declared present when the ignition is switched on.
Manipulate the wiring harness between the Gas computer and the gas pressure sensor in order to produce
a change in status (present to stored).
Look for any damage to the wiring harness and check the connection and condition of the LPG pressure/
temperature sensor and its connections.
Replace or repair the connector(s) if necessary.
Check for + 5V on track 1 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:
LPG computer track A3 track 1 of the LPG temperature/pressure sensor
Repair if necessary.
Check for earth on track 3 of the LPG temperature/pressure sensor in LPG mode.
Check the insulation in relation to + 12V and the continuity and absence of interference resistance on
the connection between:
LPG computer track B3 track 3 of the LPG temperature/pressure sensor
Repair if necessary.
Check the insulation, continuity and the absence of interference resistance on the connection between:
LPG computer track C4 track 2 of the LPG pressure/temperature sensor
Repair if necessary.
Replace the sensor if the LPG pressure is not greater than 2.5 bar in relation to 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, contact the Techline.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
GAZ3000_V08_DF083 / GAZ3000_V10_DF083

17C-41
MR-372-J84-17C000$354.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF087
PRESENT
OR
STOREDCYLINDER 4 INJECTOR CIRCUIT
CO.0: Open circuit or short circuit to earth
CC.1: Short circuit to + 12 Volts
1.DEF: Non-compliance with emission control standards
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).
NOTESPriority when dealing with a number of faults:
If fault DF021 LPG tank solenoid valve relay circuit is present or stored, deal with
this fault first.
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present after the engine is started and switched to LPG mode
or when command AC018 Cylinder 4 injector is executed.
Manipulate the wiring harness between the LPG computer and Injector number 4 to produce a change in status.
(present ↔ stored).
Look for any harness damage, and check the condition and connection of injector no. 4 and its connectors.
If necessary, repair or replace the connector.
Measure the resistance of injector 4 between tracks 1 and 2.
The injector resistance value at approximately 20°C should be between:
0.7 Ω < R < 1.45 Ω
Replace the injector if necessary.
Check for insulation against earth, continuity and absence of interference resistance for the following
connections:
For Mégane 2:
General relay track 5
Black intermediate connector (R37) track 8
LPG Computer track H3
Black intermediate connector (R37) track 4
For Logan:
Injector 4 track 1
LPG Computer track H3track 8 of the black intermediate connector (R37)
track 1of injector 4
track 4 of the black intermediate connector (R37)
track 2 of injector 4
track A1 of the double control relay unit
track 2 of injector 4
Repair if necessary.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
GAZ3000_V08_DF087 / GAZ3000_V10_DF087

17C-42
MR-372-J84-17C000$354.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF087
CONTINUED
With the ignition on,
–check for + 12V on track 1 of injector 4,
–check for earth on track 2 of injector 4 when command AC018 Cylinder 4 injector is run.
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.

17C-43
MR-372-J84-17C000$354.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF088
PRESENT
OR
STOREDCYLINDER 3 INJECTOR CIRCUIT
CO.0: Open circuit or short circuit to earth
CC.1: Short circuit to + 12 Volts
1.DEF: Non-compliance with emission control standards
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).
NOTESPriority when dealing with a number of faults:
If fault DF021 LPG tank solenoid valve relay circuit is present or stored, deal with
this fault first.
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present after the engine is started and switched to LPG mode
or when command AC019 Cylinder 3 injector is executed.
Manipulate the wiring harness between the LPG computer and Injector number 3 to produce a change in status.
(present ↔ stored).
Look for any damage to the wiring harness and check the connection and condition of the injector and its
connections.
If necessary, repair or replace the connector.
Measure the resistance of injector 3 between tracks 1 and 2.
The injector resistance value at approximately 20°C should be between:
0.7 Ω < R < 1.45 Ω
Replace the injector if necessary.
Check for insulation against earth, continuity and absence of interference resistance for the following
connections:
For Mégane 2:
General relay track 5
Black intermediate connector (R37) track 7
LPG computer track H2
Black intermediate connector (R37) track 3
For Logan:
Injector 3 track 1
LPG computer track H2track 7 of the black intermediate connector (R37)
track 1of injector 3
track 3 of the black intermediate connector
track 2 of injector 3
track A1 of the double control relay unit
track 2 of injector 3
Repair if necessary.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
GAZ3000_V08_DF088 / GAZ3000_V10_DF088