Fault location tree

ALP 1

No communication with the ECU

INSTRUCTIONS

Nothing to report.

Try the diagnostic tool on another vehicle.

Check: the link between the diagnostic tool and the diagnostic interface (cable in good condition), the link between the diagnostic interface and the vehicle diagnostic socket (cable in good condition), the injection, engine and cabin fuses

Check for a battery +12 V on pin 16, a post-ignition +12 V on pin 1, and earth on pin 5 and pin 4 of the diagnostic socket. Repair if necessary.

Repair if necessary. Disconnect the air conditioning control unit connector in order to check the insulation, continuity and absence of parasitic resistance of the wiring: Air conditioning control unit 12-way connector: Pin 11 → + before contact (see vehicle wiring diagram) Pin 10 → + auxiliary supply (see vehicle wiring diagram) Pin 6 → Earth Pin 7 → Pin 6 of the diagnostic socket (CAN H) Pin 1 → Pin 14 of the diagnostic socket (CAN L) Repair if necessary (see vehicle wiring diagram)

AFTER REPAIR

Carry out a full check with the diagnostic tool.

ALP 2

Air distribution problem

INSTRUCTIONS

Only consult this customer effect after a complete check with the diagnostic tool (no fault must be present or stored, in particular fault DF012 "Distribution motor circuit").

Notes: Commanding air distribution or ventilation cancels the automatic mode of the air conditioning.

NOTE: The air distribution motor is located on the right-hand side of the distribution-ventilation housing, above the footwell air duct.

AFTER REPAIR

Carry out a full check with the diagnostic tool.

ALP 3

Air flow problem

INSTRUCTIONS

Only refer to this customer complaint after a complete check with the diagnostic tool.

Make sure the customer is using their air conditioning.

AFTER REPAIR

Carry out a full check with the diagnostic tool.

ALP 4

Insufficient windscreen demisting efficiency

INSTRUCTIONS

Only refer to this customer complaint after a complete check with the diagnostic tool.

Notes: Check that the inside of the windows is not greasy, as this would reduce demisting efficiency.

AFTER REPAIR

Carry out a full check with the diagnostic tool

ALP 5

No cabin ventilation

INSTRUCTIONS

Only refer to this customer complaint after a complete check with the diagnostic tool.

Notes: The 2 x 5-way intermediate connector is located on the left-hand side of the distribution-ventilation housing (behind a plastic cover), and the cabin blower motor control module is located slightly higher, below the heater matrix tubes.

AFTER REPAIR

Carry out a full check with the diagnostic tool.

ALP 11

Bad odors in the cabin

CONDITIONSConsult this customer complaint only after a complete check with the diagnostic tool.

AFTER REPAIR

Carry out a full check with the diagnostic tool.

ALP 12

Water present in the cabin

INSTRUCTIONS

Only refer to this customer complaint after a complete check with the diagnostic tool.

AFTER REPAIR

Carry out a full check with the diagnostic tool.

ALP 13

No lighting on the control panel

INSTRUCTIONS

Consult this customer complaint only after a complete check of the multiplex network and the air conditioning with the diagnostic tool.

Special notes: Ignition on, the control panel display is constantly lit, but the panel buttons only light up when the parking lights are switched on.

NOTE: If the outside temperature sensor is faulty, the automatic climate control unit comes on 5 seconds after ignition is switched on (this can help identify a fault, as the outside temperature sensor is not diagnosed by the Cabin Central Unit).

AFTER REPAIR

Carry out a full check with the diagnostic tool.