2008 RENAULT SCENIC engine

17C-69
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 running at idle speed at 80°C and Petrol mode
selected.
Order FunctionParameter or Status
checked or ActionDisplay and notes Fault finding
1
LPG / Petrol
switchET093:LPG modeYES
Then NO Check 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
TransitionYES
NONONE
4ET094:Petrol modeNO
Then NORMALCheck 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-70
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 running at idle speed at 80°C and Petrol mode
selected.
Order FunctionParameter or Status
checked or ActionDisplay and notes Fault finding
7
Petrol injection
signalsPR006:Engine speedIndicates the engine's speed
of rotation in rpm.
PR006 = 750 rpm
± 50 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 engine coolant
temperature in °C.
Check the consistency of
the temperatures by
performing fault finding on
the petrol computer.
9PR103:Air temperatureIndicates the air temperature
in °C.
Check the consistency of the
temperatures by performing
fault finding on the petrol
computer.

17C-71
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 running at idle speed at 80°C 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 speedIndicates the engine's speed
of rotation in rpm.
PR006 = 750 rpm
± 50 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
valveOPENThe LPG expansion valve
solenoid valve must be OPEN
in LPG operation with the
engine running and CLOSED
in petrol operation. If there is
inconsistency, apply the
interpretation of DF103 LPG
expansion valve solenoid
valve circuit.
5Manifold
pressurePR001:Manifold
pressureIndicates the inlet manifold
vacuum pressure in mb.In the event of a fault, carry out
a full fault finding procedure on
the petrol injection system.
Deal with any other faults.
6
LPG pressurePR003:Pressure
difference:
LPG/ manifoldCalculation of the difference
between LPG pressure
and manifold pressure
in mb.
PR003 ≈ 800 mbarCheck that:
PR112 - PR001 = PR003
7PR112:LPG pressure
downstream of
expansion
valveIndicates the LPG pressure
downstream of the
expansion valve in mb.
PR112 = PR001 + 800 mbarIn the event of a fault, apply the
interpretation of
DF092 Expansion valve
downstream LPG pressure
sensor circuit and
DF017 LPG leak detection
downstream of expansion
valve.

17C-72
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 (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 running at idle speed at 80°C and LPG mode
selected.
Order FunctionParameter or Status
checked or ActionDisplay and notes Fault finding
8LPG flow
rate settingPR111:LPG flow rate
settingIndicates the LPG flow rate
setpoint in g/h.
0 g/h < PR111 < 600 g/h
NONE
9LPG
injection
durationPR110:LPG injection
timingDisplays the injection duration
in ms.
PR110 ≈ 5 ms
10
Tank senderPR013:LPG tank
sender
supply
voltage4.8 V < PR008< 5.2 VIn the event of a fault, apply
the interpretation
of DF030 LPG tank
sender supply voltage.
11 PR009:LPG tank
sender signal
voltageIndicates the signal voltage
compared to the pressure
in the LPG tank.For Logan: In the event
of a fault, apply the
interpretation
of DF029 LPG tank
sender signal voltage.
For Mégane II: In the event
of a fault, apply the
interpretation of fault
DF029 LPG tank sender
signal voltage
and parameters
PR009 and PR116. 12 PR116:Sender
resistanceFor Logan: Ignore this parameter.
For Mégane II:
Tank full:
20 Ω ± 2 Ω
Reserve tank:
290 Ω ± 2 Ω
Tank empty:
320 Ω ± 2 Ω

17C-73
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 (CONTINUED 2)
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 running at idle speed at 80°C and LPG mode
selected.
13LPG
temperaturePR113:LPG
TemperatureGives the LPG temperature
in °C.
- 40°C < PR113 < 120°CIn the event of a fault, carry
out a full fault finding
procedure on the petrol
injection system.
Deal with any other faults.
14 Fuel pump ET025:Fuel pumpINACTIVE after 1 minuteACTIVE when operating in
Petrol mode. If there is
inconsistency, carry out
a full fault finding procedure
on the petrol injection
system.
Deal with any other faults.

17C-74
MR-372-J84-17C000$472.mif
V2
LPG 3000
Program No.
Vdiag No: 08/10GAS INJECTION
Fault finding - Conformity check17C
SUB-FUNCTION: OPERATION IN PETROL 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 running at idle speed at 80°C and Petrol mode
selected.
Order FunctionParameter or Status
checked or ActionDisplay and notes Fault finding
1
LPG / Petrol
switchET021:Mode selectedPETROL NONE
2ET094:Petrol modeNORMALCheck the consistency
between statuses
ET094 Petrol mode
and ET093 LPG mode.
If there is inconsistency,
contact the Techline.
3ET084: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.
4ET023:Forced Petrol
mode, LPG
faultNOIf YES, apply the interpretation
of status ET023 Forced petrol
mode, LPG fault.
5Petrol
injection
signalPR006: Engine speedIndicates the engine's speed
of rotation in rpm.
PR006 = 750 rpm
± 50 rpmIn the event of a fault, carry out
a full fault finding procedure on
the petrol injection system.
Deal with any other faults.
6Manifold
pressurePR001:Manifold
pressureIndicates the inlet manifold
vacuum pressure in mb.

17C-75
MR-372-J84-17C000$472.mif
V2
LPG 3000
Program No.
Vdiag No: 08/10GAS INJECTION
Fault finding - Conformity check17C
SUB-FUNCTION: OPERATION IN PETROL MODE (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 running at idle speed at 80°C and Petrol mode
selected.
Order FunctionParameter or Status
checked or ActionDisplay and notes Fault finding
7Fuel pump ET025:Fuel pumpACTIVEACTIVE during
operation in petrol
mode. If there is
inconsistency, carry out
a full fault finding
procedure on the petrol
injection system. Deal
with any other faults
8
Petrol
injection
signalPR002:Coolant
temperatureIndicates the engine coolant
temperature in °C.
Check the consistency of the
temperatures by performing fault
finding on the petrol computer.In the event of a fault,
carry out a full fault
finding procedure on
the petrol injection
system. Deal with any
other faults.
9PR103:Air
temperatureIndicates the air temperature in °C.
Check the consistency of the
temperatures by performing fault
finding on the petrol computer.

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