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

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Fault finding - Introduction
1. SCOPE OF THIS DOCUMENT
This document presents the fault finding procedure applicable to the heating function with the following
specifications:
2. PREREQUISITES FOR FAULT FINDING
Documentation type
Fault finding procedures (this manual):
–Assisted fault finding (integrated into the CLIP diagnostic tool),
Wiring Diagrams:
–Visu-Schéma (CD-ROM), paper.
Special tooling required
3. REMINDERS
This heating system does not have a computer and therefore fault finding cannot be carried out on the system using
the diagnostic tool.
In this section, the fault finding procedure is dealt with by Customer complaints - Fault finding charts. Vehicle(s): New Twingo
Function concerned: Heating
Special tooling required
Multimeter and current clamp
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Fault finding - Introduction61A
4. FAULT FINDING PROCEDURE
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 - Introduction61A
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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Fault finding - Fault finding charts
ALP 6 No heating or inadequate heating
NOTESCarry out these checks after a full check using the diagnostic tool (fault reading and
configuration checks).
Check that the fuses are sound.
Use a multimeter, current clamp and 21 W test light.
Use the Wiring Diagrams Technical Note, NEW TWINGO.
Is the air flow correct?
YES
Is the air distribution correct?
YES
With a warm engine, set the heating to max.
Is the blown air hot?
NO
Using the parameter and statuses screen on the
diagnostic tool (Heating and UCH or Climate
Control sub-functions: 62B), check that the
temperature signals are consistent (no sensor
deviation resulting in incorrect measurement).
For manual air conditioning systems:
–Use parameters PR002 Exterior temperature
(depending on option) and PR024 Engine
coolant temperature.
For climate control systems:
–Use parameters PR002 Exterior
temperature, PR004 Coolant temperature
and PR001 Interior temperature.
Are the temperature signals consistent?
YES
NOSee ALP3 Air flow fault, air flow fault.
NOSee ALP2 Air distribution fault, air
distribution fault.
YESIf necessary, explain how the system works to
the customer again.
Carry 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.
–For the interior temperature sensor,
see 62B, Climate control, Fault summary
table.
Replace any faulty components.
NO
A
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Fault finding - Fault finding charts61A
ALP 6
CONTINUED 2
Note:
Fault finding procedure performed using a current clamp.
For diesel vehicles equipped with Passenger compartment heating resistors and climate control, check that
the climate control computer is correctly configured by reading the following configuration (reconfigure the
computer if necessary):
–For the climate control computer, parameter LC044 Heating resistor type should display 900 W.
With the passenger compartment fan activated, fit a current clamp to the connection of earth between the battery
and chassis earth point, and use the CLIP tool to run command AC250 Heating resistor relay 1.
Does the current measured increase by at least 20 A when the command is run?
YES NO
Connect a test light between connection 38LL of
component 1113 and the chassis earth and run
command AC250 Heating resistor relay 1.
Does the test light illuminate?
NO YES
Disconnect the passenger compartment heating resistor connector
(component 1113) and connect a test light between connections 38LL and MAK
and run command AC250 Heating resistor relay 1.
Does the test light illuminate?
NO YES
Replace the passenger compartment heating
resistor unit (component 1113) (see MR 411,
Mechanical, 61A, Heating, Heating
resistors: Removal - Refitting).
Earth fault on component 1113. If there is a repair method (see Technical Note
6015A, Repairing electrical wiring, W iring: Precautions for repair), repair or
replace the wiring.
B
C
D

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CONTINUED 3
Note:
Fault finding procedure performed using a current clamp.
With the passenger compartment fan activated, fit a current clamp to the connection of earth between the battery
and chassis earth point, and use the CLIP tool to run command AC251 Heating resistor relay 2.
Does the current measured increase by at least 40 A when the command is run?
YES NO
With the passenger
compartment heating
resistors operating, carry
out a conformity check on
the injection, heating sub-
function (see 13B, Diesel
injection, Conformity
check).
Disconnect the passenger compartment heating resistor connector
(component 1113) and connect a test light between each of the connections
38LM and MAK and run command AC251 Heating resistor relay 2.
Does the test light illuminate?
NO YES
Replace the passenger compartment
heating resistor unit (component 1113)
(see MR 411, Mechanical, 61A, Heating,
Heating resistors: Removal - Refitting).Check the continuity of the 2 connections 38LM between
components 1113 and 1068.
Is the continuity correct?
NO YES
Continuity fault on
connection 38LM. If there
is a repair method
(see Technical Note
6015A, Repairing
electrical wiring, Wiring:
Precautions for repair),
repair or replace the
wiring.Re-run command AC251 Heating resistor relay 2. Check for + 12 V supply
on connections 3FB and BP9 of component 1068.
Are the supplies correct?
YES NO
Check the engine fuse
and relay box (see 16A,
Starting Charging).Run fault finding on the injection computer
for the heating element resistor 2 command
(see 13B, Diesel injection, Conformity
check).
C

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CONTINUED 4
Note:
Fault finding procedure performed using a current clamp.
Check the continuity on connection 38LL
between components 1113 and 1067.
Is the continuity correct?
YES
Re-run command AC250 Heating resistor
relay 1. Check for + 12 V between the chassis
earth and connections 3FB and BP9 of
component 1067.
Is there + 12 V?
YES
Run fault finding on the injection computer for
the heating element resistor 1 command
(see 13B, Diesel injection, Conformity check).
NOContinuity fault on connection 38LL. If there is
a repair procedure (see Technical Note
6015A, Repairing electrical wiring, Wiring:
Precautions for repair), repair the wiring or
replace it
.
NOCheck the engine fuse and relay box
(see 16A, Starting Charging).
D

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ALP 6
CONTINUED 5
Note:
Fault finding procedure without using a current clamp.
For vehicles equipped with Passenger compartment heating resistors and climate control, check that the
climate control computer is correctly configured by reading the following configurations (reconfigure the computer
if necessary):
–For the climate control computer, parameter LC044 Heating resistor type should display 900 W.
Disconnect the passenger compartment heating resistor connector (component 1113) and connect a test light
between connections 38LL and MAK and run command AC250 Heating resistor relay 1.
Does the test light illuminate?
YES NO
Replace the passenger
compartment heating resistor unit if,
at ambient temperature, the
resistance value between
connections 38LL and MAK of
component 1113, is not between:
0.55 and 0.75 ΩΩ Ω Ω
(see MR 411,
Mechanical, 61A, Heating,
Heating resistors:
Removal - Refitting).
Connect a test light between connections 38LL of component 1113
and the chassis earth and run command AC250 Heating resistor
relay 1.
Does the test bulb illuminate?
NO YES
Earth fault on component
1113. If there is a repair
method (see Technical Note
6015A, Repairing electrical
wiring, Wiring: Precautions
for repair), repair or replace
the wiring.
B
Check the continuity on
connection 38LL between
components 1113 and 1067.
Is the continuity correct?
NO YES
Continuity fault on connection 38LL. If there is a repair
method (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair
or replace the wiring.D
C

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CONTINUED 6
Note:
Fault finding procedure without using a current clamp.
Disconnect the passenger compartment heating resistor connector (component 1113) and connect a test light
between each of the connections 38LM and MAK and run command AC251 Heating resistor relay 2.
Does the test light illuminate?
YES NO
Replace the passenger
compartment heating resistor unit if,
at ambient temperature, the
resistance value between each of
connections 38LM and MAK of
component 1113, is not between:
0.55 and 0.75 Ω
(see MR 411, Mechanical, 61A,
Heating, Heating resistors:
Removal - Refitting).
The passenger compartment
heating resistors are correct, if the
fault is still present carry out a
conformity check on the injection,
heating sub-function (see 13B,
Diesel injection, Conformity
check).
Check the continuity of the 2 connections 38LM between
components 1113 and 1068.
Is the continuity correct?
YES NO
Continuity fault on connection
38LM. If there is a repair method
(see Technical Note 6015A,
Repairing electrical wiring,
Wiring: Precautions for repair),
repair or replace the wiring.
Check for + 12 V supply on connections 3FB and BP9 of
component 1068.
Are the supplies correct?
YES NO
Check the engine fuse
and relay box (see 16A,
Starting Charging).Carry out fault finding on the injection computer for heating resistor
relay 2 control (see 13B, Diesel injection, Conformity check).
C

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ALP 7 Too much hot air
NOTESCarry out this conformity check after a full check using the diagnostic tool
(fault reading and configuration checks).
Check that the fuses are sound.
Use a multimeter and a 21 W test light.
Use the Wiring Diagrams Technical Note, NEW TWINGO.
Is the air flow correct?
YES
Is the air distribution correct?
YES
Using the diagnostic tool statuses and
parameters screen (cold loop sub-function),
check that the temperature signals are
consistent (no sensor drift resulting in incorrect
measurement).
For manual air conditioning systems:
–Use parameters PR002 Exterior temperature
(depending on version) and PR024 Engine
coolant temperature.
For climate control systems:
–Use parameters PR002 Exterior
temperature, PR004 Coolant temperature
and PR001 Interior temperature.
Are the temperature signals consistent?
YES
NOSee ALP3, Air flow fault
NOSee ALP2, Air distribution fault.
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.
–For the interior temperature sensor,
see 62B, Climate control, Fault summary
table.
Replace any faulty components.
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