RENAULT SCENIC 2008 J84 / 2.G Gas Injection LPG 3000 Repair Manual

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.

17C-57
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 (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
7
LPG / Petrol
switchET096:Petrol to LPG
TransitionNOWhen the LPG operating
mode has been selected, if
ET022 Waiting for LPG
conditions is NO and
ET100 LPG system ready
is YES, then ET096 Petrol
to LPG transition should
be YES. If there is
inconsistency, apply the
interpretation of status
ET096.
8ET093:LPG modeNOCheck the consistency
between statuses
ET094 Petrol mode
and ET093 LPG mode.
If there is inconsistency,
contact the Techline.
9
Petrol
injection
signalsPR006:Engine speedIndicates the engine's speed
of rotation in rpm.
PR006 = 0 rpmIn 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
temperatureIndicates 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. 11 PR103:Air
temperature
12LPG
temperaturePR113:LPG
TemperatureNONE

17C-58
MR-372-J84-17C000$472.mif
V2
LPG 3000
Program No.
Vdiag No: 08/10GAS INJECTION
Fault finding - Conformity check17C
SUB-FUNCTION: LPG → PETROL 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 switched off, ignition on and Petrol mode
selected.
Order FunctionParameter or Status
checked or ActionDisplay and notes Fault finding
1
LPG / Petrol
switchET093:LPG modeNOCheck the consistency between
statuses ET094 Petrol mode
and ET093 LPG mode.
If there is inconsistency, contact
the Techline.
2ET021:Mode selectedPETROL NONE
3ET095:LPG to Petrol
TransitionNO NONE
4ET094:Petrol modeNORMALCheck the consistency between
statuses ET094 Petrol mode
and ET093 LPG mode.
If there is inconsistency, contact
the Techline.
5ET084:Forced petrol
mode, empty tankNOIf YES, test the multiplex
network. 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.
6ET023:Forced Petrol
mode, LPG faultNOIf YES, apply the interpretation of
status ET023 "Forced petrol
mode, LPG fault".

17C-59
MR-372-J84-17C000$472.mif
V2
LPG 3000
Program No.
Vdiag No: 08/10GAS INJECTION
Fault finding - Conformity check17C
SUB-FUNCTION: LPG → PETROL 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 switched off, ignition on and Petrol mode
selected.
Order FunctionParameter or Status
checked or ActionDisplay and
notesFault finding
7
Petrol injection
signalsPR006:Engine speedIndicates the engine's speed
of rotation in rpm.
PR006 = 0 rpm
In the event of a fault,
carry out a full fault
finding procedure on the
petrol injection system.
Deal with any other
faults. 8PR002:Coolant
temperature Indicates the temperature
–of water in °C.
–of air in °C.
Check the consistency of the
temperatures by performing
fault finding on the petrol
computer. With a cold
engine, the two
temperatures should be
almost identical. 9PR103:Air temperature

17C-60
MR-372-J84-17C000$472.mif
V2
LPG 3000
Program No.
Vdiag No: 08/10GAS INJECTION
Fault finding - Conformity check17C
SUB-FUNCTION: OPERATION IN LPG MODE
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
switchET021:Mode selectedLPG NONE
2ET093:LPG modeYESCheck the consistency
between statuses
ET094 Petrol mode
and ET093 LPG mode.
If there is inconsistency,
contact the Techline.
3Petrol injection
signalsPR006:Engine speedShows the engine's
speed of rotation
in rpm.
PR006 = 0 rpmIn the event of a fault, carry out
a full fault finding procedure on
the petrol injection system.
Deal with any other faults.
4LPG expansion
valve solenoid
valveET106:LPG expansion
valve solenoid
valveCLOSEDThe LPG expansion valve
solenoid valve must be OPEN
during LPG operation with the
engine running and CLOSED
in petrol operation.
If inconsistent, apply
the interpretation of
DF103 "LPG expansion
valve solenoid valve circuit".