2008 RENAULT SCENIC engine

17C-26
MR-372-J84-17C000$354.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF021
PRESENT
OR
STOREDLPG TANK SOLENOID VALVE RELAY CIRCUIT
CC.1: Short circuit to + 12 Volts
CO.0: Open circuit or short circuit to earth
1.DEF: Non-compliance with emission control standards
NOTESPriority when dealing with a number of faults:
If fault DF024 Fuel pump cut-off 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 has been started and switched to LPG
mode.
Manipulate the wiring harness between the LPG computer and the LPG tank solenoid valve relay in order to
produce a change in status (present ↔ stored).
Look for possible damage to the wiring harness and check the condition and connection of the LPG tank
solenoid valve relay and its connections.
If necessary, repair or replace the connector.
With the ignition on, check for + 12V on track 1 of the LPG tank solenoid valve relay and track C2 of the LPG
computer.
If no + 12 V:
–disconnect the battery,
–in the Protection and Switching Unit, disconnect the grey connector,
–check the cleanliness and condition of the connections,
–Use the universal bornier to check the continuity of the following connection:
For Mégane 2:
Protection and Switching Unit, grey connector, track 1
For Logan:
Fuse box, track S4track 3 of the main relay
track A5 of the main relay
Repair if necessary.
Check for + 12V on track 3 of the LPG tank solenoid valve relay.
If + 12V is not present, use the universal bornier to check the continuity of the following connection:
For Mégane 2:
Tank solenoid valve relay track 3
For Logan:
Double control relay unit track B3track 5 of the fuel pump relay
track B5 of the fuel pump 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_DF021 / GAZ3000_V10_DF021

17C-27
MR-372-J84-17C000$354.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF021
CONTINUED
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 E4
For Logan:
LPG computer track E4track 2 of the gas tank solenoid valve relay
track B2 of the double control relay unit
Repair if necessary.
With the ignition on, check for earth on track 2 of the LPG tank solenoid valve relay.
If, with the ignition on, the computer does not control the LPG tank solenoid valve relay on track 2 through an
earth, contact the Techline.
With the engine running, check that the relay clicks when LPG mode is selected.
If the fault is still present, replace the LPG tank solenoid valve relay.
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-28
MR-372-J84-17C000$354.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF022
PRESENT
COMPUTER
1.DEF: Internal electronic fault
2.DEF: Non-compliance with emission control standards
NOTESFault finding procedure application conditions:
Only when fault is present.
Special note:
This fault appears when the ignition is switched off (power latch phase: computer data
backup phase) or during the engine stop phase.
Clear the faults from memory and then start the engine.
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_DF022P / GAZ3000_V10_DF022

17C-29
MR-372-J84-17C000$354.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF024
PRESENT
OR
STOREDFUEL PUMP CUT-OFF RELAY 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
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 has been running for 10 seconds in
LPG mode.
Manipulate the wiring harness between the LPG computer and the fuel pump cut-off relay 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 fuel pump cut-off
relay and its connections.
Check the insulation in relation to earth and the continuity and the absence of interference resistance on
the connection between:
For Mégane 2:
Main relay track 5
For Logan:
Double control relay unit track A3track 1 of the fuel pump cut-off relay
track B5 of the fuel pump cut-off relay
Repair if necessary.
Check the insulation in relation to + 12V and the continuity and absence of interference resistance on
the connection between:
LPG computer track F3 track 2 of the fuel pump cut-off relay
Repair if necessary.
In LPG operating mode, using status ET025 Fuel pump, check that status ET025 is ACTIVE when starting
and then changes to INACTIVE after 1 minute.
If ET025 does not change to INACTIVE, check for earth on track 2 of the fuel pump cut-off relay.
If, with the ignition on, the computer does not control the fuel pump cut-off relay on track 2 through an earth,
contact your Techline.
If the fault is still present, replace the fuel pump cut-off relay.
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_DF024 / GAZ3000_V10_DF024

17C-31
MR-372-J84-17C000$354.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF029
PRESENT
OR
STOREDLPG TANK SENDER SIGNAL VOLTAGE
CO.0: Open circuit or short circuit to earth
CO.1: Open circuit or short circuit to + 12V
CC.0: Short circuit to earth
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).
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 tank sender 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 tank sender
connector.
Replace the connector if necessary.
For Mégane II: Disconnect the connector from the LPG tank sender and measure the resistance between tracks
A and C (only for Mégane 2).
Replace the sender if the resistance value is different to the value shown in the table below (only for Mégane 2).
Check for the presence of earth on track C (for Mégane 2) or track A3 (for Logan) of the LPG tank sender
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
For Logan:
LPG computer track D4track B, of the LPG tank sender
track A2, of the LPG tank sender
If the fault is still present, check the intermediate connectors (R2 track 36, for Mégane 2), (R34 track 8 and R345
track B, for Logan).
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_DF029 / GAZ3000_V10_DF029

17C-33
MR-372-J84-17C000$354.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF030
PRESENT
OR
STOREDLPG TANK SENDER SUPPLY VOLTAGE
1.DEF: Voltage outside permitted range of values
2.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).
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 tank sender 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 tank sender
connector.
Replace the connector if necessary.
Check for a supply on track A4 (for Mégane 2) or on track B2 (for Logan) of the LPG computer and on track A
(for Mégane 2) or on track A2 (for Logan) of the fuel sender during LPG operation.
For Mégane 2: check the intermediate connectors R2 track 39, R34 track 15 and R345 track A.
Contact the Techline if the voltage value is not between 4.6V and 5.2V.
Check the insulation and continuity of the following connection:
For Mégane 2:
LPG computer track D3
For Logan:
LPG computer track D3track C of the LPG tank sender
track A1 of the LPG tank sender unit
If the fault is still present, check the intermediate connectors (R2 track 37, for Mégane 2, R674 track 4,
for Logan) and (R34 track 16 and R345 track C, for Mégane 2).
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_DF030 / GAZ3000_V10_DF030

17C-34
MR-372-J84-17C000$354.mif
V2
GAS INJECTION
Fault finding - Interpretation of faults
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
DF031
PRESENT
LPG PRESSURE DOWNSTREAM OF EXPANSION VALVE
1.DEF: Signal incoherent
2.DEF: Signal outside lower limit
3.DEF: Signal outside upper limit
4.DEF: Non-compliance with emission control standards
NOTESNone.
Manipulate the wiring harness between the LPG computer and the LPG tank pressure 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 sensor
downstream of the expansion valve and its connections.
If necessary, repair or replace the connector.
With the engine off, switch on LPG mode and check that the sender is not at minimum.
If necessary, put some LPG back into the tank.
Check that parameter PR112 LPG pressure downstream of the expansion valve is no more than 800 mbar
greater than the manifold pressure parameter 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.
Check that the LPG supply pipes are not pinched or crushed.
Replace the faulty pipes 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_DF031P / GAZ3000_V10_DF031

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