Page 207 of 279
17B-207
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V2 MR-376-X76-17B050$130.mif
PETROL INJECTION
Fault finding – Interpretation of parameters17B
V42 Injection
Program No.: 2A
Vdiag No.: 04, 05, 06,
14, 16, 18
PR446UPSTREAM O2 SENSOR HEATING RESISTOR
PA R A M E T E R
DEFINITIONThis parameter indicates the heating resistance of the downstream oxygen sensor in
Ohms.
Conformity check with engine stopped and ignition on, or engine running, and engine coolant temperature > 80°C
The value must be 9 at 20°C.
V42_V04_PR446/V42_V05_PR446/V42_V06_PR446/V42_V14_PR446/V42_V16_PR446/V42_V18_PR446
Page 208 of 279
17B-208
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V2 MR-376-X76-17B050$130.mif
PETROL INJECTION
Fault finding – Interpretation of parameters17B
V42 Injection
Program No.: 2A
Vdiag No.: 04, 05, 06,
14, 16, 18
PR447DOWNSTREAM O2 SENSOR HEATING RESISTOR
PA R A M E T E R
DEFINITIONThis parameter indicates the heating resistance of the downstream oxygen sensor in
Ohms.
Conformity check with engine stopped and ignition on, or engine running, and engine coolant temperature > 80°C
The value must be 9 at 20°C.
V42_V04_PR447/V42_V05_PR447/V42_V06_PR447/V42_V14_PR447/V42_V16_PR447/V42_V18_PR447
Page 209 of 279
17B-209V2 MR-376-X76-17B050$130.mif
PETROL INJECTION
Fault finding – Interpretation of parameters17B
V42 Injection
Program No.: 2A
Vdiag No.: 04, 05, 06,
14, 16, 18
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test, then check with the diagnostic tool.
PR448IGNITION ADVANCE
PA R A M E T E R
DEFINITIONThis parameter indicates the ignition advance in volts.
Conformity check with engine stopped and ignition on, or engine running, and engine coolant temperature > 80°C
The value must be 0° V with the ignition on and 4 V at idle speed.
In the event of a fault, apply the interpretation of fault DF120 Engine speed sensor signal.
V42_V04_PR448/V42_V05_PR448/V42_V06_PR448/V42_V14_PR448/V42_V16_PR448/V42_V18_PR448
Page 210 of 279
17B-210V2 MR-376-X76-17B050$130.mif
PETROL INJECTION
Fault finding – Interpretation of parameters17B
V42 Injection
Program No.: 2A
Vdiag No.: 04, 05, 06,
14, 16, 18
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test, then check with the diagnostic tool.
PR538MEASURED THROTTLE VOLTAGE, GANG 2
PA R A M E T E R
DEFINITIONThis parameter indicates the throttle valve gang 2 voltage measured in volts.
Conformity check with engine stopped and ignition on, or engine running, and engine coolant temperature
>80°C
The value must be 0.60 V.
In the event of a fault, apply the interpretation of fault DF096 Throttle potentiometer circuit gang 2.
V42_V04_PR538/V42_V05_PR538/V42_V06_PR538/V42_V14_PR538/V42_V16_PR538/V42_V18_PR538
Page 211 of 279
17B-211
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V2 MR-376-X76-17B050$130.mif
PETROL INJECTION
Fault finding – Interpretation of parameters17B
V42 Injection
Program No.: 2A
Vdiag No.: 04, 05, 06,
14, 16, 18
PR539THROTTLE VALVE GANG 1 MEASURE VOLTAGE
PA R A M E T E R
DEFINITIONThis parameter indicates the throttle valve voltage, gang 1 measured in volts.
Conformity check with engine stopped and ignition on, or engine running, and engine coolant temperature > 80°C
The value must be 0.35 V.
In the event of a fault, apply the interpretation of fault DF095 Throttle potentiometer circuit gang 1.
V42_V04_PR539/V42_V05_PR539/V42_V06_PR539/V42_V14_PR539/V42_V16_PR539/V42_V18_PR539
Page 212 of 279
17B-212
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V2 MR-376-X76-17B050$130.mif
PETROL INJECTION
Fault finding – Interpretation of parameters17B
V42 Injection
Program No.: 2A
Vdiag No.: 04, 05, 06,
14, 16, 18
PR814NUMBER OF ACTIVE HEATING RESISTORS
PA R A M E T E R
DEFINITIONThis parameter indicates the number of active heating resistors and can be between 0
to 5 depending on the relays activated.
0 if no relay is active
1 if relay 1 is active
2 if relay 2 is active
3 if relays 1 and 2 are active
4 if relays 2 and 3 are active
5 if all of the relays are active
Conformity check: Engine stopped and ignition on, or engine running, and engine coolant temperature < 80°C
In the event of a fault, consult the interpretation of faults:
DF992 Additional heater relay 1 circuit,
DF993 Additional heater relay 2 circuit,
DF994 Additional heater relay 3 circuit.
V42_V04_PR814/V42_V05_PR814/V42_V06_PR814/V42_V14_PR814/V42_V16_PR814/V42_V18_PR814
Page 220 of 279

17B-220
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V2 MR-376-X76-17B050$160.mif
PETROL INJECTION
Fault finding – Fault Finding Chart17B
V42 Injection
Program No.: 2A
Vdiag No.: 04, 05, 06,
14, 16, 18
ALP 1 No dialogue with the computer
NOTESSee the Wiring Diagrams Technical Note for Logan, Sandero, Duster, Thalia 2/
Symbol 2, Clio II F 6, Kangoo VLL.
Try to establish dialogue with a computer on another vehicle to make sure that the diagnostic tool is not faulty. If
the tool is not the cause and communication cannot be established with any other computer on the same vehicle,
it is possible that another computer is disrupting the multiplex network.
Check the voltage of the battery.
If the battery voltage is between 9.5 V and 17.5 V, run fault finding on the charging circuit.
– Check the presence and condition of the injection fuses on the UPC and in the engine fuse box.
– Check the connection of the computer connectors, component code 120.
– Check the injection computer earths (quality, oxidation, tightness of the earth bolts on the battery terminal).
– Check that the supply to the computer is correct:
–Earth on connection NH of component 120 (for Logan, Sandero, Duster, Kangoo VLL),
–Earth on connection N of component 120 (for Thalia 2/Symbol 2),
–Earth on connection NF of component 120 (for Clio II F 6)
–+ 12V on connection 3FB of component 120.
If the connection(s) are faulty and there is a repair method (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check that the diagnostic socket, component code 225 is correctly supplied:
–+ before ignition feed on connection BP56 of component 225 (for Logan, Sandero, Duster),
–+ before ignition feed on connection BP10 of component 225 (for Thalia 2/Symbol 2, Clio II F 6, Kangoo
VLL),
–+ after ignition feed on connection AP10 of component 225,
– Earth on connections MAM and NC of component 225 (for Logan, Sandero, Duster
),
– Earth on connections N and M of component 225 (for Thalia 2/Symbol 2, Clio II F 6),
– Earth on connections NA and MK of component 225 (for Kangoo VLL).
If the connection(s) are faulty and there is a repair method (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
If dialogue has still not been established after these checks, contact the techline.
V42_V04_ALP1/V42_V05_ALP1/V42_V06_ALP1/V42_V14_ALP1/V42_V16_ALP1/V42_V18_ALP1
PETROL INJECTION
Fault finding – Fault Finding Chart
Page 231 of 279
17B-231
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V2 MR-376-X76-17B050$160.mif
PETROL INJECTION
Fault finding – Fault Finding Chart17B
V42 Injection
Program No.: 2A
Vdiag No.: 04, 05, 06,
14, 16, 18
ALP 12 Blue smoke from the exhaust
Check the oil.
Check the coolant temperature sensor by running TEST 15 Coolant temperature sensor check.
Check the spark plugs.
Check the ignition coil by running TEST 14 Checking the ignition coil.
Check the injectors by running TEST 13 Checking the injectors.
Check the oil filter.
Check the oil circuit.
Check the exhaust manifold.
Check the oil pump.
Check the pistons and piston rings.
Check the cylinder head.
Check the inlet and exhaust valves.
Check the rotating parts.
If the fault is still present, contact the techline.
V42_V04_ALP12/V42_V05_ALP12/V42_V06_ALP12/V42_V14_ALP12/V42_V16_ALP12/V42_V18_ALP12