62B-68
MR-413-X44-62B000$828_eng.mif
V1
62B
CLIMATE CONTROL
Diagnostic - Fault finding chart
ALP 1 No dialogue with the computer
NOTESSpecial notes: To run fault finding on the vehicle computers, use the key to switch on
the ignition.
Use the W iring Diagram Technical Note for the New Twingo.
Check that the vehicle is equipped with climate control.
Try to establish dialogue with a computer on another vehicle to make sure that the diagnostic tool is not faulty.
If the tool is not at fault, and dialogue cannot be established with any other computer on the same vehicle, the
cause could be a faulty computer interfering on the multiplex network.
Check the battery voltage and perform the necessary operations to obtain a correct voltage (9.5 V < Battery
voltage < 17.5 V, see section 16A Starting-charging).
Check:
–the connection between the diagnostic tool and the diagnostic probe (lead in good condition),
–the connection between the diagnostic sensor and the diagnostic socket (lead in good condition).
Carry out fault finding on the multiplex network using the diagnostic tool (see 88B, Multiplex).
Check the condition and position of fuse F29 (15 A) in the passenger compartment fuse box.
Consult section 81C Fuses.
Disconnect the connectors of the following components of connection SP2:
●Component connector 615
●Component connector 419
●Component connector 645
●Component connector 319
●Component connector 261
●Component connector 653
●Component connector 1428
Check the insulation and continuity of connection SP2 between components 419 and 1016.
Check the vehicle earth connection NAM of the connector of component 419.
If the connection is faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for the
repair), repair the wiring, otherwise replace the wiring.
If these checks do not reveal any faults, carry out a test on each of the components involved in connection
SP2 (short circuit).
Check the condition and position of fuse F18 (10 A) in the passenger compartment fuse box.
Consult section 81C Fuses.
Disconnect the connectors of the following components of connection BP6:
●Component connector 995
●Component connector 419
AFTER REPAIRCarry out a complete check with the diagnostic tool.
CLIM_V44_ALP1
Vdiag No.: 44
MR-413-X44-62B000$828_eng.mif
