Page 187 of 279

17B-187V2 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.
PR059INLET AIR TEMPERATURE
PA R A M E T E R
DEFINITIONThis parameter indicates the air temperature in °C.
Conformity check with engine stopped and ignition on.
With the ignition on the inlet air temperature varies according to the exterior temperature.
In the event of a fault, consult the interpretation of fault DF002 Air temperature sensor circuit.
Parameter PR059 PR064 Coolant temperature engine cold.
Conformity check with the engine running and engine coolant temperature > 80°C
With the engine running at idle speed the inlet air temperature varies according to the engine coolant temperature.
In the event of a fault, refer to the interpretation of fault DF002.
V42_V04_PR059/V42_V05_PR059/V42_V06_PR059/V42_V14_PR059/V42_V16_PR059/V42_V18_PR059
Page 188 of 279

17B-188V2 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.
PR064COOLANT TEMPERATURE
PA R A M E T E R
DEFINITIONThis parameter indicates the engine coolant temperature in °C.
NOTESThere must be no present or stored faults.
Perform this fault finding procedure:
– after finding an inconsistency in the parameter,
– after a customer complaint (e.g. lack of power).
Conformity check with engine stopped and ignition on.
With the ignition on the coolant temperature varies according to the exterior temperature.
In the event of a fault, consult the interpretation of fault DF001 Coolant temperature sensor circuit.
Conformity check with the engine running and engine coolant temperature > 80°C
With the engine running at idle speed the coolant temperature varies according to the engine temperature.
If there is a fault, refer to the interpretation of fault DF001.
V42_V04_PR064/V42_V05_PR064/V42_V06_PR064/V42_V14_PR064/V42_V16_PR064/V42_V18_PR064
Page 190 of 279
17B-190V2 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.
PR089VEHICLE SPEED
PA R A M E T E R
DEFINITIONGives the vehicle speed in km/h.
Conformity check: Engine stopped and ignition on, or engine running, and engine coolant temperature > 80°C.
Carry out a road test, observing the vehicle speed on the instrument panel and the information given by the
diagnostic tool.
If there is an inconsistency between the two values, run complete fault finding on the ABS computer (see 38C,
ABS).
V42_V04_PR089/V42_V05_PR089/V42_V06_PR089/V42_V14_PR089/V42_V16_PR089/V42_V18_PR089
Page 198 of 279

17B-198
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
PR139RICHNESS ADAPTIVE OPERATION
PA R A M E T E R
DEFINITIONNo faults must be present.
Conformity check with the engine running and engine coolant temperature > 80°C
Check the sealing of the fuel vapour absorber bleed.
Repair if necessary.
With the engine warm in the idle speed regulation phase, look at parameter PR139.
– If the parameter goes to MAXIMUM stop, there is not enough fuel or too much air in the mixture.
– If the parameter goes to MINIMUM stop, there is too much fuel or not enough air in the mixture.
Check the cleanliness and correct operation of:
– petrol filter,
– petrol pump,
– fuel circuit,
–tank,
– air supply pipe,
– air filter,
– plugs.
Repair if necessary.
Check:
– the compressions,
– the valve clearance,
– the ignition.
Repair if necessary.
V42_V04_PR139/V42_V05_PR139/V42_V06_PR139/V42_V14_PR139/V42_V16_PR139/V42_V18_PR139
Page 206 of 279
17B-206
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
PR444BUILT-IN CORRECTION FOR IDLE SPEED REGULATION
PA R A M E T E R
DEFINITIONThis parameter indicates the built-in correction for idle speed regulation in N.m.
Conformity check with engine stopped and ignition on, or engine running, and engine coolant temperature > 80°C
The built-in idle speed regulation correction is continuously calculated to take into account consumer air demand.
V42_V04_PR444/V42_V05_PR444/V42_V06_PR444/V42_V14_PR444/V42_V16_PR444/V42_V18_PR444
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 213 of 279

17B-213V2 MR-376-X76-17B050$140.mif
17B
V42 Injection
Program No.: 2A
Vdiag No.: 04, 05, 06,
14, 16, 18
*TDC: Top Dead Centre
**GMV: fan assemblyTool
commandDiagnostic tool title Comments
RZ001 Fault memoryThis command is used to clear the faults stored in the computer.
RZ003 Engine adaptivesThis command enables a long engine start time.
RZ031 Throttle stop programmingThis command is used to reset the necessary system adaptives
if replacing the throttle valve.
RZ033Richness regulation
programmingThis command is used to reset the necessary system adaptives
if replacing the injectors.
RZ037Flywheel target
programmingThis command is used to reset the necessary system adaptives
if replacing the TDC* sensor.
RZ064Programming the level of
alcoholThis command is used to count the richness adaptive
programming necessary when replacing the injection computer.
AC005 Cylinder 1 injectorThis command is used to perform an audible check on injector 1.
AC006 Cylinder 2 injectorThis command is used to perform an audible check on injector 2.
AC007 Cylinder 3 injectorThis command is used to perform an audible check on injector 3.
AC008 Cylinder 4 injectorThis command is used to perform an audible check on injector 4.
AC015 Fuel pump relayThis command is used to check the fuel pump.
AC017Canister bleed solenoid
valveThis command is used to check the canister bleed solenoid
valve.
AC027 Motorised throttleThis command is used to check the motorised throttle.
AC038 Low speed GMV** relayThis command is used to check the low speed GMV** relay.
AC039 High speed GMV** relayThis command is used to check the high speed GMV** relay.
AC180Air conditioning
compressor relay controlThis command is used to check the air conditioning compressor
relay.
PETROL INJECTION
Fault finding – Command summary table
Page 218 of 279
17B-218V2 MR-376-X76-17B050$150.mif
PETROL INJECTION
Fault finding – Customer complaints17B
V42 Injection
Program No.: 2A
Vdiag No.: 04, 05, 06,
14, 16, 18
DRIVING PLEASURE
ROUGH IDLEALP21
IDLE SPEED TOO HIGH OR TOO LOW ALP22
JERKING OR HESITATION ALP23
ENGINE STALLSALP24
ERRATIC ACCELERATION ALP25
ERRATIC DECELERATION ALP26
ENGINE RACING (WITHOUT ACTION ON THE PEDAL) ALP27
SUSPECTED NOISE WITH NO FAULT ON THE DEPHASER SYSTEMTechnical Note
6506A
ALP 2
OIL LEAK FROM THE CAMSHAFT DEPHASERTechnical Note
6506A
ALP 7
OIL LEAK FROM THE CAMSHAFT DEPHASER SOLENOID VALVETechnical Note
6506A
ALP 8