Renault Megane Quiz
Chassis

Fault location tree

In this manual: Chassis
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
~3min read
ALP 1 No communication with the ECU

INSTRUCTIONS

Nothing to report.

Try the diagnostic tool on another vehicle.

Check that the tool has an update later than CD-ROM No. 32.
Check:
  • the link between the diagnostic tool and the diagnostic socket (connection and condition of the link cable).
  • the ECU power supply.
  • the engine and passenger compartment fuses.
Check that the CLIP probe is powered through pins 16 (+12 V) and 4 and 5 (ground) of the diagnostic socket, indicated by both red indicator lights on the probe coming on.

Check that the CLIP probe is powered by the computer's USB port.

Check that the CLIP tool communicates with the vehicle's ECUs, indicated by both green LEDs on the CLIP lighting up.
Check the following circuits at the diagnostic socket:

pin 1 → + After ignition
pin 16 → + Battery
pins 4 and 5 → Earth

Repair if necessary.
Check the continuity, insulation and absence of parasitic resistance of the lines:

CAN H (pin 6 of the diagnostic socket)
CAN L (pin 14 of the diagnostic socket)
Using a multimeter, check that the voltages at the diagnostic socket terminals are approximately:

- 2.5 V between CAN H (pin 6) and earth (pins 4 and 5)
- 2.5 V between CAN L (pin 14) and earth (pins 4 and 5)
If, after all these checks, communication still cannot be established with the Cabin Central Unit, contact your Techline.

AFTER REPAIR

Check that no fault is present any longer.

Check that the system operates correctly.

ALP 2 "Tyre pressure to be readjusted" message illuminates (the affected wheel becomes solid on the display)

Note: On vehicles with Vdiag 44, the "service" warning light comes on in addition to the message on the instrument panel.

INSTRUCTIONS

Check that all the wheels concerned are fitted with tyre pressure monitoring valves.

Allumage du message "pression pneu à réajuster"

AFTER REPAIR

Carry out a full check with the diagnostic tool.

ALP 3 "Tyre pressure to be readjusted" message illuminates (2 wheels become solid on the display)

Note: On vehicles with Vdiag 44, the "service" warning light comes on in addition to the message on the instrument panel.

INSTRUCTIONS

Check that all the wheels concerned are fitted with tyre pressure monitoring valves.

Allumage du message "pression pneu à réaguster"

AFTER REPAIR

Carry out a full check with the diagnostic tool.

ALP 4 "Tyre sensor out of service" message illuminates (one wheel indicator disappears)

INSTRUCTIONS

Check that all the wheels concerned are fitted with tyre pressure monitoring valves.

Allumage du message "Capteur pneu hors service"

AFTER REPAIR

Carry out a full check with the diagnostic tool.

ALP 5 "Tyre sensor out of service" message illuminates (all 4 wheel indicators disappear)

INSTRUCTIONS

Check that all the wheels are fitted with tyre pressure monitoring valves.

Allumage du message "Capteur pneu hors service"

AFTER REPAIR

Carry out a full check with the diagnostic tool.

ALP 6 "Puncture, change the wheel" message illuminates (the wheel becomes solid on the display)

INSTRUCTIONS

Without.

Allumage du message "crevaison changer la roue"

AFTER REPAIR

Carry out a full check with the diagnostic tool.

Test yourself

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