2008 RENAULT SCENIC sensor

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-82
MR-372-J84-17C000$590.mif
V2
GAS INJECTION
Fault finding - Interpretation of statuses
LPG 3000
Program No.
Vdiag No: 08/10
17C
ET100
LPG SYSTEM READY
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 ET100 indicates YES if no LPG fault is present.
Check:
–the LPG tank solenoid valve (see DF013 Tank solenoid valve circuit),
–the general relay (see DF007 Main relay circuit),
–the LPG expansion valve solenoid valve (see DF103 LPG expansion valve solenoid valve),
–the LPG pressure sensor (see DF092 Expansion valve downstream pressure sensor circuit),
–the LPG pressure in the tank (see DF031 LPG pressure downstream of expansion valve).
Repair or replace the faulty components, if necessary.
Check:
–the LPG filling hoses,
–the supply hoses upstream of the expansion valve,
–the expansion valve,
–the hoses downstream of the expansion valve.
Repair or replace the faulty components, if necessary.
If the status is still not correct, contact the Techline.
AFTER REPAIRFollow the instructions to confirm repair.
GAZ3000_V08_ET100 / GAZ3000_V10_ET100

17C-83
MR-372-J84-17C000$649.mif
V2
17C
GAS INJECTION
Fault finding - Interpretation of parameters
Tool parameter Diagnostic tool title
PR001Manifold pressure
PR002Coolant temperature
PR003Pressure difference: LPG/ manifold
PR006Motor speed
PR007LPG tank sender signal voltage
PR012Engine speed multiplex signal
PR013LPG tank sender supply voltage
PR103Air temperature
PR110LPG injection duration
PR111LPG flow rate setpoint
PR112LPG pressure downstream of expansion valve
PR113LPG temperature
PR114Sensor supply voltage
PR116Sender resistance
LPG 3000
Program No.
Vdiag No: 08/10
MR-372-J84-17C000$649.mif

17C-84
MR-372-J84-17C000$708.mif
V2
17C
GAS INJECTION
Fault finding - Interpretation of parameters
PR003
PRESSURE DIFFERENCE: LPG/ MANIFOLD
IMPORTANT
For an operation on a component of the LPG supply circuit, consult the safety instructions (see 17D,
Gas injection, Introduction, Safety instructions for all operations).
NOTESThere must be no present or stored faults.
Engine running in LPG mode.
Check that the pressure difference is 800 mbar.
Check the consistency in pressure difference 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, manipulate the wiring harness between the manifold pressure sensor and the LPG
pressure/temperature sensor in order to produce a change in status.
Check the connection and condition of the manifold pressure sensor and the LPG pressure / temperature
sensor, and its connections.
If necessary, repair or replace the connector.
If the pressure difference is still inconsistent, apply the interpretation of fault DF031 LPG pressure downstream
of expansion valve.
If the fault is still present, replace the LPG pressure/temperature sensor (see MR 364 Mechanical, 17D,
LPG injection).
If the fault is still present, check the manifold pressure sensor by testing the Petrol computer (see 17B,
Petrol injection, Interpretation of faults).
If the fault is still present, contact the Techline.
AFTER REPAIRFollow the instructions to confirm repair.
GAZ3000_V08_PR003 / GAZ3000_V10_PR003
LPG 3000
Program No.
Vdiag No: 08/10
MR-372-J84-17C000$708.mif

17C-85
MR-372-J84-17C000$708.mif
V2
GAS INJECTION
Fault finding - Interpretation of parameters
LPG 3000
Program No.
Vdiag No: 08/10
17C
PR007
LPG TANK SENDER SIGNAL VOLTAGE
NOTESThere must be no present or stored faults.
Ignition on, engine stopped.
Using the LPG tank sender signal voltage value PR007 and measure the resistance, using a multimeter between
tracks A and C (for Mégane 2 ) or tracks A1 and A2 (for Logan).
Check the consistency between these values using the table below.
In the event of inconsistency, check for earth on track D or C (for Mégane 2 ) or track 3 or 4 (for Logan) of LPG
tank pressure sensor connector.
Repair if necessary.
Check the insulation against earth, continuity and the absence of interference resistance of the connections
between:
For Mégane 2:
LPG computer track A4
LPG computer track D3
For Logan:
LPG computer track B2
LPG computer track D3track A of the LPG tank sender
track C of the LPG tank sender
track A2 of the LPG tank sender
track A1 of the LPG tank sender unit
Repair if necessary.
Pressure sensor voltage
in V (± 0.5 V)Needle position
4Full
1Reserve
0Empty
AFTER REPAIRFollow the instructions to confirm repair.
GAZ3000_V08_PR007 / GAZ3000_V10_PR007

17C-86
MR-372-J84-17C000$708.mif
V2
GAS INJECTION
Fault finding - Interpretation of parameters
LPG 3000
Program No.
Vdiag No: 08/10
17C
PR112
LPG PRESSURE DOWNSTREAM OF EXPANSION VALVE
NOTESThere must be no present or stored faults.
Ignition on, engine stopped.
Check that the LPG pressure downstream of the expansion valve is not more than 800 mbar greater than 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, manipulate the wiring harness between the LPG computer and the LPG pressure/
temperature sensor to produce a status change.
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 track 3 (for Mégane 2) or track 1 (for Logan) 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.
AFTER REPAIRFollow the instructions to confirm repair.
GAZ3000_V08_PR112 / GAZ3000_V10_PR112

17C-87
MR-372-J84-17C000$708.mif
V2
GAS INJECTION
Fault finding - Interpretation of parameters
LPG 3000
Program No.
Vdiag No: 08/10
17C
PR112
CONTINUED
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 C3
LPG computer track E2track 2 of the LPG pressure/temperature sensor
track 4 of the LPG pressure/temperature sensor
track 2 of the LPG pressure/temperature sensor
Repair if necessary.
If the fault is still present, replace the LPG pressure/temperature sensor.
If the fault is still present, check the expansion valve (see MR 364 Mechanical, 17D, LPG injection).
AFTER REPAIRFollow the instructions to confirm repair.

17C-100
MR-372-J84-17C000$944.mif
V2
GAS INJECTION
Fault finding - Fault finding chart (ALP)
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
ALP 2 LPG sender fault
For Mégane II
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).
NOTESCheck that there is LPG in the tank.
Disconnect the LPG tank sender connector and check the voltage of the sensor signal using parameter
PR007 LPG tank sender signal voltage.
Replace the sensor if the signal voltage is not approximately:4.8 V tank full
1 V in reserve
0.2 V tank empty
Check for earth on track C (for Mégane 2) of the LPG tank connector.
Repair if necessary.
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 B1 track B of the LPG tank sender
If the fault is still present, check the intermediate connectors (R2 track 36 and R34 track 34 for Mégane 2).
Repair if necessary.
If the fault is still present, check the LPG tank pressure sensor (see MR 364 Mechanical, 17D, LPG injection).
AFTER REPAIRCheck using the diagnostic tool.
GAZ3000_V08_ALP2 / GAZ3000_V10_ALP2