Renault Megane Quiz
Engine and peripherals

Interpreting parameters

In this manual: Engine and peripherals
Engine and peripherals — 141Chassis — 79Chassis — 72Renault Mégane III Driver's Manual — 87Electrical equipment — 221Engine and peripherals — 47Electrical equipment — 80Transmission — 14Air conditioning — 30Bodywork — 115Trim and upholstery — 44General vehicle information — 27Air conditioning — 59General vehicle information — 16Transmission — 38Sealing and soundproofing — 7General vehicle information — 3
~14min read
PR030 ACCELERATOR PEDAL POSITION

INSTRUCTIONS

No fault must be present or stored

Check that the accelerator pedal is not mechanically seized.
Check the cleanliness and condition of the accelerator pedal potentiometer connector.
Disconnect the battery and the injection ECU.

Check the connector for cleanliness and condition.

Use the "Universal breakout box". Check insulation and continuity of the following connections:

ECU pin H3, connector A → Pedal potentiometer
ECU pin G2, connector A → Pedal potentiometer
ECU pin H2, connector A → Pedal potentiometer
ECU pin F4, connector A → Pedal potentiometer
ECU pin F2, connector A → Pedal potentiometer
ECU pin F3, connector A → Pedal potentiometer

(see the connector pin numbers in the corresponding wiring diagram)
If the fault persists, replace the pedal potentiometer.

AFTER REPAIR

Restart the conformity check from the beginning.

PR032 INTAKE PRESSURE

INSTRUCTIONS

No fault must be present or stored.

Check the cleanliness and condition of the manifold pressure sensor and its connector.
Disconnect the battery and the injection ECU.

Check the connector for cleanliness and condition.

Use the "Universal breakout box". Check insulation and continuity of the following connections:

ECU pin H2, connector B → Manifold pressure sensor
ECU pin H3, connector B → Manifold pressure sensor
ECU pin H4, connector B → Manifold pressure sensor

(see the connector pin numbers in the corresponding wiring diagram)
If the fault is still present, replace the manifold pressure sensor.
If the problem persists, perform the following checks: The intake line must be perfectly sealed, from the throttle body to the cylinder head.

Check:

  • the condition of the air filter,
  • that the air intake circuit is not obstructed,
  • the seal between the throttle body and the intake manifold,
  • the seal of the manifold pressure sensor,
  • the fuel vapour canister purge valve, which must not be stuck open,
  • the EVAP canister purge circuit for leaks,
  • the seal of the brake booster circuit,
  • the turbocharger protection valve circuit for leaks,
  • the seal of the cylinder head oil vapour recovery circuit,
  • the seal between the intake manifold and the cylinder head,
  • the exhaust line from the cylinder head to the catalytic converter for leaks.

AFTER REPAIR

Restart the conformity check from the beginning.

PR037 REFRIGERANT FLUID PRESSURE

INSTRUCTIONS

No fault must be present or stored.

Check the cleanliness and condition of the manifold pressure sensor and its connector.
Disconnect the battery and the injection ECU.

Check the connector for cleanliness and condition.

Connect the "Universal breakout box" in place of the ECU and check insulation and continuity of the following links:

ECU pin J2, connector B → Refrigerant fluid sensor
ECU pin J3, connector B → Refrigerant fluid sensor
ECU pin K2, connector B → Refrigerant fluid sensor

see the connector pin numbers in the corresponding wiring diagram)
If the problem persists, replace the refrigerant fluid sensor.
If the fault is still present, check the air conditioning circuit (refer to the Repair Manual)

AFTER REPAIR

Restart the conformity check from the beginning.

PR071 CONTROL MODULE SUPPLY VOLTAGE

INSTRUCTIONS

No fault must be present or stored.

With no electrical loads.

Ignition on If voltage is too low: Check the battery and the charging circuit (see the corresponding chapter in the Repair Manual).
If voltage is too high: Check that the charging voltage is correct with and without electrical loads (see the corresponding chapter in the Repair Manual)
At idle If voltage is too low: Check the battery and the charging circuit (see the corresponding chapter in the Repair Manual).
If voltage is too high: Check that the charging voltage is correct with and without electrical loads (see the corresponding chapter in the Repair Manual

AFTER REPAIR

Restart the conformity check from the beginning.

PR094 CAMSHAFT PHASER SETPOINT RCO

INSTRUCTIONS

No fault must be present or stored.

If there is an inconsistency with PR093 "Measured camshaft phaser position", deal with it first.

Check the cleanliness and condition of the camshaft sensor connector.
Check the resistance of the camshaft phaser solenoid valve (see the value in the "Help" chapter).

If the value is not within specification, replace the camshaft phaser solenoid valve.
Check with ignition on for +12 V at the camshaft phaser solenoid valve connector (see the connector pin number in the corresponding wiring diagram). If there is no +12 V:
  • disconnect the battery,
  • disconnect the connector marked "PPM1" in the Protection and Switching Unit,
  • check the cleanliness and condition of the connector,
  • use the "Universal breakout box" and check continuity of the following connection:

Protection and Switching Unit connector PPM1 pin 1 → Camshaft phaser solenoid valve
Reconnect the Protection and Switching Unit connector and reconnect the battery.

If there is still no +12 V at the camshaft phaser solenoid valve connector with ignition on, there is a fault in the Protection and Switching Unit.

Contact the Techline
Disconnect the battery.

Disconnect the ECU. Check the cleanliness and condition of the connector.

Use the "Universal breakout box". Check insulation and continuity of the following connection:

ECU pin L3, connector B → Camshaft phaser solenoid valve

(see the connector pin numbers in the corresponding wiring diagram)
If the problem persists, replace the camshaft phaser solenoid valve.
If the fault is still not resolved, there is most likely a mechanical problem in the camshaft phaser system.

Refer to the appropriate chapter in the Repair Manual.

AFTER REPAIR

Restart the conformity check from the beginning.

PR095 KNOCK CORRECTION

KNOCK CORRECTION

No fault must be present or stored.

The knock sensor must output a non-zero signal, proving that it detects the engine's mechanical vibrations.
Check that the fuel in the tank meets specification.
Check the condition and specification of the spark plugs.
Check the tightening torque of the knock sensor.
Check the cleanliness and condition of the knock sensor connector.
Disconnect the battery and the injection ECU.

Check the connector for cleanliness and condition.

Use the "Universal breakout box". Check insulation and continuity of the following connections:

ECU pin B3, connector B → Knock sensor
ECU pin B4, connector B → Knock sensor
ECU pin B2, connector B → Knock sensor shield

(see the connector pin numbers in the corresponding wiring diagram)
If the problem persists, replace the knock sensor.

AFTER REPAIR

Restart the conformity check from the beginning.

PR098 UPSTREAM OXYGEN SENSOR VOLTAGE

INSTRUCTIONS

No fault must be present or stored.

Check the cleanliness and condition of the upstream oxygen sensor connector.
Disconnect the battery and the injection ECU.

Check the connector for cleanliness and condition.

Use the "Universal breakout box". Check insulation and continuity of the following connections:

ECU pin C1, connector C → Upstream oxygen sensor
ECU pin B1, connector C → Upstream oxygen sensor

(see the connector pin numbers in the corresponding wiring diagram)
Check the tightening of the upstream oxygen sensor.
If the vehicle is driven mainly in town, perform a decarbonising run.
Check that there is no leak in the exhaust line from the manifold to the catalytic converter.
If the problem persists, replace the upstream oxygen sensor.
If the problem is still not resolved, continue with the checks.
Check:
  • the condition of the air filter,
  • that the air intake circuit is not obstructed,
  • the condition and conformity of the spark plugs,
  • that the catalytic converter is not clogged,
  • the seal between the throttle body and the intake manifold,
  • the seal of the manifold pressure sensor,
  • the EVAP canister purge valve, which must not be stuck open,
  • the seal of the fuel vapour canister purge circuit,
  • the seal of the brake booster circuit,
  • the seal of the cylinder head oil vapour recovery circuit,
  • the seal between the intake manifold and the cylinder head,
  • the seal of the exhaust line from the cylinder head to the catalytic converter,
  • the fuel pressure and flow rate.

If the idle speed is unstable, check:

  • the valve timing,
  • the hydraulic lash adjusters if there is a camshaft noise (see the Repair Manual),
  • the cylinder compressions.
Carry out a road cycle to confirm the repair.

AFTER REPAIR

Restart the conformity check from the beginning.

PR099 DOWNSTREAM OXYGEN SENSOR VOLTAGE

INSTRUCTIONS

No fault must be present or stored.

Check the cleanliness and condition of the downstream oxygen sensor connector.
Disconnect the battery and the engine ECU. Use the "Universal breakout box". Check the insulation and continuity of the following connections:

ECU pin A2, connector C → Downstream oxygen sensor
ECU pin B2, connector C → Downstream oxygen sensor

(See the connector pin numbers in the corresponding wiring diagram)
Check the tightening of the downstream oxygen sensor.
If the vehicle is driven mostly in town, carry out a decarbonising (fouling of the oxygen sensors and catalytic converter).
Check that the exhaust line is perfectly sealed.
Replace the downstream oxygen sensor.
If the problem persists, the catalytic converter is most likely damaged.
If the catalytic converter is faulty, the cause of its failure must be determined, otherwise the new catalytic converter may be damaged.
Remove the catalytic converter.
The following are causes of catalytic converter failure:
  • deformation (impact),
  • thermal shock (splashing cold water on a hot catalytic converter can cause it to fail),
  • injector or ignition fault: fuel contact damages the catalytic converter (faulty coil, faulty coil control, injector stuck open),
  • injector leak,
  • abnormal oil or coolant consumption (faulty head gasket),
  • use of an additive or similar product (ask the customer, as this type of product can contaminate the catalytic converter and make it ineffective over time).

Check the service "history" of the vehicle or, if unavailable, ask the customer whether the vehicle has had fuel injection or ignition problems.
If the cause of the catalytic converter failure has been found and the problem resolved, replace the catalytic converter.

AFTER REPAIR

Restart the conformity check from the beginning.

AC015 FUEL PUMP RELAY

INSTRUCTIONS

No fault must be present or stored.

IF THE RELAY DOES NOT CLICK Disconnect the battery and the injection ECU.

Check the cleanliness and condition of the ECU connector.

Disconnect the "PEM" connector at the Protection and Switching Unit and check the cleanliness and condition of the connector.

Use the "Universal breakout box". Check insulation and continuity of the following connection:

ECU pin D1, connector C → Protection and Switching Unit PEM pin 1

(See the connector pin number in the corresponding wiring diagram)
If the fault is still present, there is a problem in the Protection and Switching Unit (the fuel pump relay is inside the Protection and Switching Unit and cannot be removed).

Contact Techline.
IF THE PUMP DOES NOT RUN Disconnect the fuel pump.

Check the connector for cleanliness and condition.

With the ignition on, check for + 12 V at the fuel pump connector (see the pin number in the corresponding wiring diagram). If there is no + 12 V:
  • disconnect the battery,
  • disconnect the connector marked PPH2 at the Protection and Switching Unit,
  • check the cleanliness and condition of the connector,
  • using the "Universal breakout box", check the continuity of the following link:

Protection and Switching Unit connector PPH2 pin 5 → Fuel pump connector
Reconnect the Protection and Switching Unit connector and reconnect the battery.

If there is still no + 12 V with the ignition on at the fuel pump relay connector, there is a problem in the Protection and Switching Unit.

Contact Techline.
Check for earth at the connector (see the pin number in the corresponding wiring diagram).

Repair if necessary.
If the problem persists, replace the fuel pump.

AFTER REPAIR

Restart the conformity check from the beginning.

AC017 EVAPORATIVE PURGE SOLENOID VALVE

INSTRUCTIONS

No fault must be present or stored

Check the cleanliness and condition of the connector on the fuel vapour canister purge solenoid valve.
Check the resistance of the fuel vapour canister purge solenoid valve (see the value in the "Help" section).

If the value is not within specification, replace the fuel vapour canister purge solenoid valve.
With the ignition on, check for + 12 V at the connector of the fuel vapour canister purge solenoid valve (see the connector pin number in the corresponding wiring diagram). If there is no + 12 V:
  • disconnect the battery,
  • disconnect connector PPM1 from the Protection and Switching Unit,
  • check the cleanliness and condition of the connector,
  • using the "Universal breakout box", check the continuity of the following link:

Protection and Switching Unit connector PPM1 pin 2 → Fuel vapour canister purge solenoid valve
Reconnect the Protection and Switching Unit connector and reconnect the battery.

If there is still no + 12 V with the ignition on at the fuel vapour canister purge solenoid valve connector, there is a problem in the Protection and Switching Unit.

Contact Techline.
Disconnect the battery.

Disconnect the ECU. Check the cleanliness and condition of the connector.

Use the "Universal breakout box". Check insulation and continuity of the following connection:

ECU pin E1, connector C → Fuel vapour canister purge solenoid valve

(See the connector pin numbers in the corresponding wiring diagram)
If the problem persists, replace the solenoid valve.

AFTER REPAIR

Restart the conformity check from the beginning.

AC027 ELECTRONIC THROTTLE BODY

INSTRUCTIONS

No fault must be present or stored.

SAFETY: do not drive the vehicle until you have checked that there are no faults relating to the throttle body.

Check the cleanliness and condition of the throttle body and its connector.
Check by hand that the throttle plate rotates correctly.
Disconnect the battery and the injection ECU.

Check the connector for cleanliness and condition.

Connect the "Universal breakout box" and check the insulation and continuity of the following connections:

ECU pin M3, connector B → Electronic throttle body
ECU pin M4, connector B → Electronic throttle body
ECU pin G4, connector B → Electronic throttle body
ECU pin G3, connector B → Throttle potentiometer track 1
ECU pin G2, connector B → Throttle potentiometer track 1
ECU pin D3, connector B → Throttle potentiometer track 2
ECU pin G2, connector B → Throttle potentiometer track 2

(See the connector pin numbers in the corresponding wiring diagram)
Check the resistance of the throttle motor between pins M3 and M4 (see the value in the "Help" chapter).

If the value is not within specification, replace the throttle body.
If the problem persists, replace the throttle body.

AFTER REPAIR

If the throttle body has been replaced, carry out a learning reset ("RZ008").

Restart the conformity check from the beginning.

Test yourself

A quick Renault Megane quiz: every answer comes with an explanation and a link to the manual page.