wiring RENAULT TWINGO 2009 2.G Heating And Air Conditioning - Manual Air Conditioning Workshop Manual

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Fault finding - Introduction
1. SCOPE OF THIS DOCUMENT
This document presents the fault finding procedure applicable to all computers with the following specifications:
2. PREREQUISITES FOR FAULT FINDING
Documentation type
Fault finding procedures (this document and the Technical Notes concerning the injection system
fitted to the vehicle, and the UCH):
–Assisted fault finding (integrated into the diagnostic tool), Dialogys.
Wiring Diagrams:
–Visu Schéma (CD-ROM), paper.
Type of diagnostic tools
–CLIP + multiplex line sensor
Special tooling required
3. REMINDERS
Procedure
To run fault finding on the vehicle computers, proceed as follows:
–turn the ignition key to APC,
–Connect the diagnostic tool and carry out the required operations,
To cut off the + after ignition feed, proceed as follows:
–disconnect the diagnostic tool,
–turn the ignition key to OFF,
–switch off the ignition. Vehicle(s): New Twingo
Function concerned: Manual air conditioning
Special tooling required
Multimeter
Elé. 1681 Universal bornier
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4. FAULT FINDING PROCEDURE (CONTINUED)
Wiring check
Fault finding problems
Disconnecting the connectors and/or manipulating the wiring harness may temporarily remove the cause of a fault.
Electrical measurements of voltage, resistance and insulation are generally correct, especially if the fault is not
present when the analysis is made (stored fault).
Visual inspection of the connection:
●Check that the connector is connected correctly and that the male and female parts of the connection are
correctly coupled.
Visual inspection of the area around the connection:
●Check the condition of the mounting (pin, strap, adhesive tape, etc.) if the connectors are attached to the
vehicle.
●Check that there is no damage to the wiring trim (sheath, foam, adhesive tape, etc.) near the wiring.
●Check that there is no damage to the electrical wires at the connector outputs, in particular on the
insulating material (wear, cuts, burns, etc.).
Disconnect the connector to continue the checks.
Visual inspection of the plastic casing:
●Check that there is no mechanical damage (casing crushed, cracked, broken, etc.), in particular to the
fragile components (lever, lock, openings, etc.).
●Check that there is no heat damage (casing melted, darker, deformed, etc.).
●Check that there are no stains (grease, mud, liquid, etc.).
Visual inspection of the metal contacts:
(The female contact is called CLIP. The male contact is called TAB.)
●Check that there are no bent contacts (the contact is not inserted correctly and can come out of the back
of the connector). The spring contact of the connector when the wire is gently pulled.
●Check that there is no damage (folded tabs, clips open too wide, blackened or melted contact, etc.).
●Check that there is no oxidation on the metal contacts. Note:
Carry out each requested check visually. Do not remove a connector if it is not required.
Note:
Repeated connections and disconnections alter the functionality of the connectors and increase the risk of poor
electrical contact. Limit the number of connections/disconnections as much as possible.
Note:
The check is carried out on the 2 parts of the connection. There may be two types of connections:
–Connector / Connector
–Connector / Device

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Fault finding - Introduction62C
Visual inspection of the sealing:
(Only for watertight connectors)
●Check for the seal on the connection (between the 2 parts of the connection).
●Check the seal at the back of the connectors:
–For unit joints (1 for each wire), check that the unit joints are present on each electrical wire and that
they are correctly positioned in the opening (level with the housing). Check that plugs are present on
openings which are not used.
–For a grommet seal (one seal which covers the entire internal surface of the connector), check that
the seal is present.
–For gel seals, check for gel in all of the openings without removing the excess or any protruding
sections (it does not matter if there is gel on the contacts).
–For hotmelt sealing (heat-shrink sheath with glue), check that the sheath has contracted correctly on
the rear of the connectors and electrical wires, and that the hardened glue comes out of the side of
the wire.
●Check that there is no damage to any of the seals (cuts, burns, significant deformation, etc.).
If a fault is detected, repair or replace the wiring (see Technical Note 6015A, Repairing electrical wiring, Wiring:
Precautions for repair).
5. FAULT FINDING LOG
You will always be asked for this log:
●when requesting technical assistance from Techline,
●for approval requests when replacing parts for which approval is mandatory,
●to be attached to monitored parts for which reimbursement is requested. The log is needed for warranty
reimbursement, and enables better analysis of the parts removed.
6. SAFETY INSTRUCTIONS
Safety rules must be observed during any work on a component to prevent any damage or injury:
–check the battery voltage to avoid incorrect operation of computer functions,
–do not smoke,
–Use the proper tools. IMPORTANTIMPORTANT
Any fault on a complex system requires thorough fault finding with the appropriate tools. The
FAULT FINDING LOG, which should be completed during the procedure, enables you to keep
track of the procedure which is carried out. It is an essential document when consulting the
manufacturer.
IT IS THEREFORE MANDATORY TO FILL OUT A FAULT FINDING LOG EACH TIME FAULT FINDING IS
CARRIED OUT.

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ALP 5
CONTINUED 1
Using a multimeter in the voltmeter position, check for + 12 V on connection SP3 of component 164 and earth
MAN of component 319.
Are the checks correct?
YES NO
Is the vehicle fitted with electric windows?
YES NO
Carry out a continuity test on
connection SP3 between components
164 and 1428.Carry out a continuity test on connection SP3
between components 164 and fuse F28 (30A) of
component 1016.
YES NO NO YES
D
Repair the wiring. If there is a repair procedure
(see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise replace it.Check fuse
F28 (30A) of
component 1016.
Make sure that the control panel speed selection button works properly.
Position the speed selection button on speed 1 and carry out a continuity check between connection MAN and
connection 38AH of component 319.
Position the speed selection button on speed 2 and carry out a continuity check between connection MAN and
connection 38AJ of component 319.
Position the speed selection button on speed 3 and carry out a continuity check between connection MAN and
connection 38AK of component 319.
Position the speed selection button on speed 4 and carry out a continuity check between connection MAN and
connection 38AL of component 319.
Are the checks correct?
YES NO
Replace the air conditioning control panel.
AFTER REPAIRCarry out a complete check with the diagnostic tool.

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ALP 5
CONTINUED 2
Carry out a continuity test on connection 38AH between components 319 and 164.
Is the continuity correct?
YES NO
Carry out a continuity test
on connection 38AJ
between components 319
and 164.
Is the continuity correct?
YES NO
Carry out a continuity test
on connection 38AK
between components 319
and 164.
Is the continuity correct?
YES NO
Carry out a continuity test
on connection 38AL
between components 319
and 164.
Is the continuity correct?
YES NO
Fault on connection 38AL between components 319 and 164. Repair the wiring.
If there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Fault on connection 38AH between components 319 and 164. Repair the wiring.
If there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Fault on connection 38AJ between components 319 and 164. Repair the wiring.
If there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Fault on connection 38AK between components 319 and 164. Repair the wiring.
If there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
AFTER REPAIRCarry out a complete check with the diagnostic tool.

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ALP 5
CONTINUED 3
Disconnect the connector of component 1156, position the speed switch in position V4.
Using a test light, check for + 12 V between connections 38DA and 38DB of component 1156.
Does the test light illuminate?
YES NO
Replace fan assembly 1 (see MR 411 Mechanical,
61A, Heating, Fan assembly control unit:
Removal - Refitting).
Is the continuity correct?
YES NO
Carry out a continuity test on connection 38DB
between components 1156 and 164.
Is the continuity correct?
YES NO
End of procedure. Fault on connection 38DB between components 1156
and 164. Repair the wiring. If there is a repair
procedure (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair),
repair the wiring, otherwise replace it.
Carry out a continuity test on connection 38DA
between components 1156 and 164.
Fault on connection 38DA between components 1156
and 164. Repair the wiring. If there is a repair
procedure (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair),
repair the wiring, otherwise replace it.
AFTER REPAIRCarry out a complete check with the diagnostic tool.

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ALP 5
CONTINUED 4
Using a test light, check for + 12 V between connection SP2 and earth MAM.
Is the test light lit?
YES NO
Using a test light, check for + 12 V between
connection BP1 of component 1428 and a chassis
earth.Using a test light, check for + 12 V between
connnection SP2 and a chassis earth.
Is the test light lit? Is the test light lit?
YES NO YES NO
Activate speed 1 and,
using a test light, check for
+ 12 V between
connection SP3 of
component 1156 and a
chassis earth.Carry out a continuity
test on connection
BP1 between
component 1428 and
fuse
F24 (30A) of
component 1016.Fault on connection MAM.
Repair the wiring. If there is a
repair procedure (see Technical
Note 6015A, Repairing
electrical wiring, Wiring:
Precautions for repair), repair
the wiring, otherwise replace it.Carry out a
continuity test
on connection
SP2 between
component
1428 and fuse
F29-15A of
component
1016 Is the test light lit? Is the continuity
correct?
YES NO YES NO
Replace the
fan assembly.Replace the
fan assembly
relay.Fault on connection MAM.
Repair the wiring. If there is
a repair procedure (see
Technical Note 6015A,
Repairing electrical
wiring, Wiring:
Precautions for repair),
repair the wiring, otherwise
replace it.
D
Is the continuity correct?
YES NO
AFTER REPAIRCarry out a complete check with the diagnostic tool.

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ALP 5
CONTINUED 5
Check fuse F24-30A of
component 1016.Check fuse F29-15A of
component 1016.Fault on connection SP2. Repair
the wiring. If there is a repair
procedure (see Technical Note
6015A, Repairing electrical
wiring, Wiring: Precautions
for repair), repair the wiring,
otherwise replace it.
AFTER REPAIRCarry out a complete check with the diagnostic tool.

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Preliminary cold loop efficiency test
ALP 8 No cold air
NOTESConsult this customer complaint after a full check with the diagnostic tool
(fault reading and configuration checks).
Check that the engine speed is greater than 750 rpm and that the exterior
temperature is above 3 ˚C.
Check that the fuses are sound.
Use a multimeter and a 21 W test light.
Use the Wiring Diagram Technical Note, New Twingo.
With engine running, air conditioning in maximum
cold position and maximum ventilation speed. After
10 minutes, is the high pressure pipe at the
compressor outlet hot, and the low pressure pipe at
the evaporator outlet cold and iced up?
NO
Check the cleanliness of the condenser. Touch the
pipes: are they warmer at the inlet than the outlet?
YES
Is the dehydrator reservoir pipe hot at the inlet and
outlet?
YES
Is the expansion valve pipe hot at the inlet and
outlet?
NO
Is the evaporator pipe hot at the inlet and outlet?
NO
1
YES2
NOReplace the condenser (see MR 411
Mechanical, 62A, Air conditioning,
Condenser: Removal - Refitting).
NOReplace the dehydrator reservoir (see MR
411 Mechanical, 62A, Air conditioning,
Dehydrator reservoir: Removal -
Refitting).
YESReplace the expansion valve (see MR 411
Mechanical, 62A, Air conditioning,
Expansion valve: Removal - Refitting).
YESReplace the evaporator (see MR 411
Mechanical, 62A, Air conditioning,
Evaporator: Removal - Refitting).
AFTER REPAIRCarry out a complete check with the diagnostic tool.

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ALP 8
CONTINUED 1
1
Using the diagnostic tool statuses and parameters
screen (UCH heating sub-function), check that the
temperature signals are consistent (no sensor
deviations resulting in incorrect measurement).
–Use statuses PR002 Exterior temperature and
PR024 Engine coolant temperature.
Are the temperature signals consistent?
YES
Start the engine and switch on the air conditioning by
pressing the AC button (with a request for maximum
cold temperature and the passenger compartment
blower running).
2
Display the following status in the “User selection”
sub-function screen:
ET029 Air conditioning button should be
PRESSED.
Note:
The status indicates if the signal for the AC button
pressed on the control panel is read by the UCH
correctly.
Does status ET029 display PRESSED?
YES
NOCarry out a conformity check:
–For the coolant temperature sensor,
see 13B, Diesel injection, Fault
summary table or 17B Petrol
injection, Fault summary table.
–For the exterior temperature sensor,
see 87B, Passenger compartment
connection unit, Fault summary
table.
Replace any faulty components.
NOContinuity fault on connection 38LP.
Using an ohmmeter, carry out a continuity
test on connection 38LP between
components 319 and 645. If there is a
procedure (see Technical Note 6015A,
Repairing electrical wiring, Wiring:
Precautions for repair), repair the wiring,
otherwise replace the wiring.
AFTER REPAIRCarry out a complete check with the diagnostic tool.