ABS RENAULT SCENIC 2008 J84 / 2.G Gas Injection LPG 3000 User Guide

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-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-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-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

17C-45
MR-372-J84-17C000$354.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF092
PRESENT
OR
STOREDLPG PRESSURE SENSOR DOWNSTREAM OF EXPANSION VALVE
CO.0: Short circuit to earth
CC.1: Open circuit or short circuit to + 12V
1.DEF: Non-compliance with emission control standards
NOTESFault finding procedure application conditions:
Present or stored fault.
Manipulate the wiring harness between the LPG computer and the LPG pressure/temperature 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/
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 tracks 3 and 1 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.
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 E2track 2 of the LPG pressure/temperature sensor
track 2 of the LPG pressure/temperature sensor
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_DF092 / GAZ3000_V10_DF092

17C-47
MR-372-J84-17C000$413.mif
V2
17C
GAS INJECTION
Fault finding - Interpretation of faults
DF095
PRESENT
OR
STOREDLPG TEMPERATURE SENSOR CIRCUIT
1.DEF : Signal outside lower limit
2.DEF : Signal outside upper limit
3.DEF : Non-compliance with emission control standards
IMPORTANT
Before working on an LPG supply circuit component, always refer to the appropriate section of the
Workshop Repair Manual (see 17D, LPG Injection, Introduction, Safety advice for all operations).
NOTESConditions for applying the fault finding procedure to stored faults:
–The fault is declared present after the engine has been started and switched to LPG
mode.
Manipulate the wiring harness between the LPG computer and the LPG temperature/pressure sensor in order to
produce a change in status (present to stored).
Look for any damage to the harness, and check the connection and condition of the LPG pressure/temperature
sensor and its connectors.
If necessary, repair or replace the connector.
Check for + 5 V on track 3 of the LPG pressure/temperature sensor in LPG mode.
Check the following connections for insulation from earth, continuity and absence of extraneous resistance:
LPG computer track A3 track 3 of the LPG pressure/temperature sensor
Repair if necessary.
Check for earth on track 1 of the LPG pressure/temperature sensor in LPG mode.
Check the following connections for insulation from +5 V, continuity and absence of extraneous resistance:
LPG computer track B3 track 1 of the LPG pressure/temperature sensor
Repair if necessary.
Check the insulation, the continuity and absence of unwanted resistance on the connection between:
LPG computer track E2 track 2 of the LPG pressure/temperature sensor
Repair if necessary.
Measure the resistance of the temperature sensor.
Replace the sensor if the resistance is not: 2.5 kΩ ± 0.1 kΩ at 20 ˚C
1.2 kΩ ± 0.1 Ω at 40 ˚C
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_DF095 / GAZ3000_V10_DF095
LPG 3000
Program No: AB
Vdiag No: 08/10
MR-372-J84-17C000$413.mif

17C-49
MR-372-J84-17C000$413.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF098
PRESENT
OR
STOREDCYLINDER 1 INJECTOR CIRCUIT
CO.0 : Open circuit or short circuit to earth
CC.1 : Short circuit to + 12 V
1.DEF : Non-compliance with emission control standards
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).
NOTESPriority when dealing with a number of faults:
If fault DF021 LPG tank solenoid valve relay circuit is present or stored, deal with it 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 AC021 Cylinder 1 injector is executed.
Manipulate the wiring harness between the injection computer and the cylinder 1 injector in order to produce a change in
status
(present ↔ stored).
Look for any harness damage, and check the condition and connection points of the injector and its connections.
If necessary, repair or replace the connector.
Measure the resistance of injector 1 between tracks 1 and 2.
The injector resistance value at roughly 20 °C must be between:
0.77 Ω < R < 1.43 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 5
LPG computer track G3
Black intermediate connector (R37) track 1
For Logan:
Injector 1 track 1
LPG computer track G3track 15 of the black intermediate connector (R37)
track 1 of injector 1
track 1 of the black intermediate connector (R37)
track 2 of injector 1
track A1 of the double relay control unit relay
track 2 of injector 1
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_DF098 / GAZ3000_V10_DF098

17C-52
MR-372-J84-17C000$413.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF103
PRESENT
OR
STOREDLPG EXPANSION VALVE SOLENOID VALVE CIRCUIT
CO.0 : Open circuit or short circuit to earth
CC.1 : Short circuit to + 12 V
1.DEF : Non-compliance with emission control standards
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).
NOTESPriority when dealing with a number of faults:
If fault DF021 LPG tank solenoid valve relay circuit is present or stored, deal with it
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 AC024 LPG expansion solenoid valve is executed.
Manipulate the wiring harness between the LPG computer and the LPG expansion valve solenoid valve in order
to produce a change in status (present ↔ stored).
Look for possible damage to the harness, and check the condition and connection of the LPG expansion valve
solenoid valve and its connectors.
Repair if necessary.
Measure the resistance between tracks 1 and 2 of the LPG expansion valve solenoid valve.
Replace the solenoid valve if the resistance is not approximately 12.6 Ω ± 1.3Ω .
Check the following connections for insulation from earth, continuity and absence of extraneous resistance:
For Mégane 2:
LPG expansion valve solenoid valve track 1
For Logan:
LPG expansion valve solenoid valve track 1
Intermediate connector (R674) track 1track 5 of the main relay
Intermediate connector (R674) track 1
track A3 of the main relay
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_DF103 / GAZ3000_V10_DF103

17C-53
MR-372-J84-17C000$413.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF103
CONTINUED
Check the following connections for insulation from +12 V, continuity and absence of extraneous resistance:
For Mégane 2:
LPG expansion valve solenoid valve track 2
For Logan:
LPG expansion valve solenoid valve track 2
Intermediate connector (R674) track 2track G2 of the LPG computer
Intermediate connector (R674) track 2
track G2 of the LPG computer
Repair if necessary.
With the engine running, check that the LPG expansion valve solenoid valve clicks when the LPG mode is
selected or command AC024 LPG expansion valve solenoid valve is executed.
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.