2008 RENAULT SCENIC Gas Injection LPG 3000 Workshop Manual

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-50
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
CONTINUED
With the ignition on,
–check for +12 V on track 1 of injector 1,
–check for earth on track 2 of injector 1 when command AC021 Cylinder 1 injector is executed.
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-51
MR-372-J84-17C000$413.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF099
PRESENT
OR
STOREDINSTRUMENT PANEL INDICATOR LIGHT 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
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.
Special note:
Status ET099 LPG system faulty may help in dealing with this fault.
Check the insulation and continuity on the wires of the following multiplex connections:
For Mégane 2:
LPG computer track A1
LPG computer track A2
LPG computer track A2
For Logan:
LPG computer track C1
LPG computer track E1
LPG computer track D4track 17 of the instrument panel
track 18 of the instrument panel
track 4 of the instrument panel
track 23 of the instrument panel
track 11 of the instrument panel
track 19 of the instrument panel
Repair if necessary.
If the LPG in operation indicator light does not light up normally, carry out fault finding on the instrument
panel (see 83A, Instrument panel).
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_DF099 / GAZ3000_V10_DF099

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.

17C-54
MR-372-J84-17C000$472.mif
V2
17C
GAS INJECTION
Fault finding - Conformity check
MAIN SCREEN
NOTESOnly perform this conformity check after a complete check with the diagnostic tool.
The values indicated in this conformity check are given as examples.
Application conditions: Engine stopped, ignition on and LPG mode selected.
Order FunctionParameter or Status
checked or ActionDisplay and notes Fault finding
1Main relay ET049:General relayINACTIVEIn the event of a fault,
apply the interpretation
of DF007 Main relay circuit.
2
Petrol/LPG
mode
consistencyET021:Mode selectedLPG NONE
3ET094:Petrol modeNORMALCheck the consistency
between statuses
ET094 Petrol mode
and ET093 LPG mode.
If there is inconsistency,
contact the Techline. 4PR093:LPG modeNO
5
Engine speedPR006:Engine speedPR006 = 0 mph
(0 km/h)In the event of a fault, carry out
a full fault finding procedure on
the petrol injection system.
Deal with any other faults.
6PR012:Engine speed
multiplex signalPR012 = 0 mph
(0 km/h)In the event of a fault,
apply the interpretation
of DF074 TDC signal circuit.
7LPG switch ET105:LPG switchPRESSED
RELEASEDIn the event of a fault, apply
the interpretation
of DF020 Fuel sender
switching relay circuit.
8Sensor voltage PR114:Sensor feed
voltage4.9 V < PR114 < 5 VIn the event of a fault, apply
the interpretation of DF096
Sensor supply voltage.
GAZ3000_V08_CCONF / GAZ3000_V10_CCONF
LPG 3000
Program No.
Vdiag No: 08/10
MR-372-J84-17C000$472.mif

17C-55
MR-372-J84-17C000$472.mif
V2
LPG 3000
Program No.
Vdiag No: 08/10GAS INJECTION
Fault finding - Conformity check17C
MAIN SCREEN (CONTINUED)
NOTESOnly perform this conformity check after a complete check with the diagnostic tool.
The values indicated in this conformity check are given as examples.
Application conditions: Engine stopped, ignition on and LPG mode selected.
Order FunctionParameter or Status
checked or ActionDisplay and notes Fault finding
9
TemperaturesPR103:Air temperature Indicates the temperature
–of water in °C.
–of air in °C.
–of gas in °C.
Check the consistency of the
temperatures by performing
fault finding on the petrol
computer.
With a cold engine,
the three temperatures
should be almost identical.In the event of a fault,
carry out a full fault
finding procedure on the
petrol injection system.
Deal with any other
faults. 10 PR002:Coolant
temperature
11 Gas temperature PR113:Gas temperatureNONE

17C-56
MR-372-J84-17C000$472.mif
V2
LPG 3000
Program No.
Vdiag No: 08/10GAS INJECTION
Fault finding - Conformity check17C
SUB-FUNCTION: PETROL → LPG TRANSITION
NOTESOnly perform this conformity check after a complete check with the diagnostic tool.
The values indicated in this conformity check are given as examples.
Application conditions: Engine stopped, ignition on and LPG mode selected.
Order FunctionParameter or Status
checked or ActionDisplay and notes Fault finding
1
LPG / Petrol
switchET094:Petrol modeNORMALCheck the consistency between
statuses ET094 Petrol mode
and ET093 LPG mode.
If there is inconsistency, contact
the Techline.
2ET084:Forced petrol
mode, empty
tankNOIf YES, carry out a multiplex network
test. If the multiplex network is
correct, check that the LPG
tank is full.
If the tank is full, apply the
interpretation of status ET084
Forced petrol mode, tank empty.
3ET023:Forced Petrol
mode,
LPG faultNOIf YES, apply the interpretation
of status ET023 Forced petrol
mode, LPG fault.
4ET021:Mode selectedLPG NONE
5ET100:LPG system
readyNOIf there is inconsistency, apply
the interpretation of status
ET100 LPG system ready.
6ET022:Waiting for
LPG conditionsNOIf there is inconsistency, apply the
interpretation of status ET022
Waiting for LPG conditions.