Page 209 of 230

PETROL INJECTION
Fault finding - Interpretation of parameters
17B
17B - 209
PETROL INJECTION
Fault finding - Interpretation of parameters
17B
17B - 209V9 MR-372-J84-17B050$705.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54
PR098
CONTINUED
If the fault is still present, replace the upstream oxygen sensor.
If the fault has still not been cured, continue with the checks.
Check:
– the condition of the air filter,
– that the air inlet circuit is not blocked,
– the condition and conformity of the spark plugs,
– that the catalytic converter is not clogged,
– the sealing between the throttle valve and inlet manifold,
– the manifold pressure sensor sealing,
– the fuel vapour absorber bleed, which must not be jammed open,'
– the fuel vapour absorber bleed system sealing,
– the brake servo system sealing,
– the cylinder head oil vapour recovery system sealing,
– the sealing between the inlet manifold and cylinder head,
– the exhaust pipe sealing between the cylinder head and catalytic converter.
– the fuel flow rate and pressure.
If the idle speed is not stable, check:
– the timing adjustment,
– the hydraulic tappets if there is camshaft noise (see MR 364 or 370 Mechanics, 11A, Top and front of engine),
– the cylinder compressions.
Drive the vehicle to check the repair.
AFTER REPAIRRepeat the conformity check from the start.
Page 210 of 230

PETROL INJECTION
Fault finding - Interpretation of parameters
17B
17B - 210
PETROL INJECTION
Fault finding - Interpretation of parameters
17B
17B - 210V9 MR-372-J84-17B050$705.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54
PR099
DOWNSTREAM OXYGEN SENSOR VOLTAGE
NOTESThere must be no present or stored faults.
Check the cleanliness and condition of the downstream oxygen sensor connections.
Repair if necessary.
Disconnect the battery and the injection computer.
Using the Universal bornier, check the insulation and continuity of the following connections:
Injection computer, connectorC, track A2 track C of the downstream oxygen sensor
Injection computer, connectorC, track B2 track D of the downstream oxygen sensor
Repair if necessary.
Check the tightness of the downstream oxygen sensor.
Repair if necessary.
If the vehicle is driven frequently in town, carry out the unclogging procedure (oxygen sensors and catalytic
converter clogging).
Check that the exhaust pipe is completely leak free.
Repair if necessary.
AFTER REPAIRRepeat the conformity check from the start.
S3000_V4C_PR099/S3000_V54_PR099
Page 211 of 230

PETROL INJECTION
Fault finding - Interpretation of parameters
17B
17B - 211
PETROL INJECTION
Fault finding - Interpretation of parameters
17B
17B - 211V9 MR-372-J84-17B050$705.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54
PR099
CONTINUED
Replace the downstream oxygen sensor.
If the fault is still present, the catalytic converter is certainly damaged.
If the catalytic converter is defective, determine the cause of the destruction, otherwise the new catalytic
converter may be damaged in turn.
Remove the catalytic converter.
Various things may destroy a catalytic converter:
–deformation (impact),
–thermal shock (cold water splashed onto a hot catalytic converter can damage it),
–defective injector or ignition: the catalytic converter is damaged by contact with fuel (coil fault, coil control fault,
injector jammed open),
–injector leak,
–abnormal oil or coolant consumption (defective cylinder head gasket),
–use of a fuel additive or other equivalent product (obtain information from the customer because this type of
product can contaminate the catalytic converter and render it useless sooner or later).
Look up the service history of the vehicle or, if this is not possible, ask the customer if the vehicle has had injection
or ignition faults.
If the cause of the catalytic converter damage has been found and the fault has disappeared, replace the
catalytic converter.
AFTER REPAIRRepeat the conformity check from the start.
Page 212 of 230

PETROL INJECTION
Fault finding - Interpretation of parameters
17B
17B - 212
PETROL INJECTION
Fault finding - Interpretation of parameters
17B
17B - 212V9 MR-372-J84-17B050$705.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54
PR312
MANIFOLD PRESSURE
NOTESThere must be no present or stored faults.
Check the cleanliness and condition of the manifold pressure sensor and its connections.
Repair if necessary.
Disconnect the battery and the injection computer.
Check the cleanliness and condition of the connections.
Using the Universal bornier, check the insulation and continuity of the following connections:
Injection computer, connectorB, track H2 track C of the manifold pressure sensor
Injection computer, connectorB, track H3 track B of the manifold pressure sensor
Injection computer, connectorB, track H4 track A of the manifold pressure sensor
Repair if necessary.
If the fault is still present, replace the manifold pressure sensor.
If the fault is still present, carry out the following checks:
The inlet line must be perfectly sealed, from the throttle valve to the cylinder head.
Check:
– the condition of the air filter,
– that the air inlet circuit is not blocked,
– the sealing between the throttle valve and inlet manifold,
– the manifold pressure sensor sealing,
– the fuel vapour absorber bleed, which must not be jammed open,
– the fuel vapour absorber bleed system sealing,
– the brake servo system sealing,
– the cylinder head oil vapour recovery system sealing,
– the sealing between the inlet manifold and cylinder head,
– the exhaust pipe sealing between the cylinder head and catalytic converter.
Repair if necessary.
AFTER REPAIRRepeat the conformity check from the start.
S3000_V4C_PR312/S3000_V54_PR312
Page 213 of 230
PETROL INJECTION
17B
17B-213
PETROL INJECTION
17B
17B-213V9 MR-372-J84-17B050$752.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54PETROL INJECTION
Fault finding - Command summary table
Tool command Diagnostic tool title
RZ001Fault memory
RZ005Programming
AC017Canister bleed solenoid valve
AC018Upstream O
2 sensor heating
AC019Downstream O
2 sensor heating
AC027Motorised throttle
AC079Actuator static test
AC195Electric coolant pump
AC253Camshaft dephaser: Normal control
AC254Camshaft dephaser: ON/OFF control
VP020Enter VIN
MR-372-J84-17B050$752.mif
Page 214 of 230

PETROL INJECTION
Fault finding - Interpretation of commands
17B
17B - 214
PETROL INJECTION
Fault finding - Interpretation of commands
17B
17B - 214V9 MR-372-J84-17B050$799.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54PETROL INJECTION
Fault finding - Interpretation of commands
AC017
CANISTER BLEED SOLENOID VALVE
NOTESThere must be no present or stored faults.
Check the cleanliness and condition of the fuel vapour absorber bleed solenoid valve connections.
Repair if necessary.
Measure the resistance of the petrol vapour absorber bleed solenoid valve.
Replace the bleed solenoid valve for the fuel vapour absorber if the resistance is not 26Ω ±4Ω at 23 °C.
Check for + 12 V feed on track 1 of the fuel vapour absorber bleed solenoid valve with the ignition on.
If +12V is not present:
– using the Universal bornier, check for continuity on the following connections:
Fuel computer, connectorB, track M2 track 1 of the petrol vapour absorber bleed
solenoid valve
Main relaytrack 1 of the petrol vapour absorber bleed
solenoid valve
Repair if necessary.
Disconnect the battery.
Disconnect the computer. Check the cleanliness and condition of the connections.
Using the Universal bornier, check the insulation and continuity of the following connection:
Petrol computer, connector C, track E1 track 2 of the fuel vapour absorber bleed
solenoid valve
Repair if necessary.
If the fault is still present, replace the solenoid valve.
AFTER REPAIRRepeat the conformity check from the start.
S3000_V4C_AC017/S3000_V54_AC017
MR-372-J84-17B050$799.mif
Page 215 of 230
PETROL INJECTION
Fault finding - Interpretation of commands
17B
17B - 215
PETROL INJECTION
Fault finding - Interpretation of commands
17B
17B - 215V9 MR-372-J84-17B050$799.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54
AC027
MOTORISED THROTTLE
WARNING
Never drive the vehicle without checking first that there are no throttle valve faults.
NOTESThere must be no present or stored faults.
Switch on the ignition and run command AC027 Motorised throttle.
If the motorised throttle does not work, apply the interpretation for DF079 Motorised throttle valve automatic
control.
AFTER REPAIRRepeat the conformity check from the start.
S3000_V4C_AC027/S3000_V54_AC027
Page 216 of 230

PETROL INJECTION
Fault finding - Interpretation of commands
17B
17B - 216
PETROL INJECTION
Fault finding - Interpretation of commands
17B
17B - 216V9 MR-372-J84-17B050$799.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54
AC079
ACTUATOR STATIC TEST
NOTESThere must be no present or stored faults.
Switch the ignition on and run command AC079 Actuator static test.
If the following actuators are not working, apply the interpretation of the associated fault:
– Fuel pump relay, apply the interpretation of DF085 Fuel pump relay circuit.
– The motorised throttle, apply the interpretation of DF079 Motorised throttle valve servo control.
– The electric coolant pump, apply the interpretation of DF570 Coolant pump relay.
–Upstream O
2 sensor heating, apply the interpretation of DF601 Upstream O2 sensor heating power circuit.
– Downstream O
2 sensor heating, apply the interpretation of DF602 Downstream O2 sensor heating power
circuit.
AFTER REPAIRRepeat the conformity check from the start.
S3000_V4C_AC079/S3000_V54_AC079