ESP RENAULT TWINGO RS 2009 2.G Electrical Equipment - Access Safety Workshop Manual

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Fault finding - Introduction82D
Faults
Faults are declared as either present or stored (depending on whether they appeared in a certain context and have
disappeared since, or whether they remain present but have not been diagnosed within the current context).
The present or stored status of faults should be taken into consideration when the diagnostic tool is switched on
after the + after ignition feed (without any system components being active).
For a present fault, apply the procedure described in the Interpretation of faults section.
For a stored fault, note the faults displayed and apply the instructions in the Notes section.
If the fault is confirmed when the instructions in the Notes section are applied, the fault is present. Deal with the fault
If the fault is not confirmed, check:
–the electrical lines which correspond to the fault,
–the connectors on these lines (corrosion, bent pins, etc.),
–the resistance of the component detected as faulty,
–the condition of the wires (melted or split insulation, wear).
Conformity check
The aim of the conformity check is to check data that does not produce a fault on the diagnostic tool because the
data is inconsistent. Therefore, this stage is used to:
–carry out fault finding on faults that do not have a fault display, and which may correspond to a customer
complaint.
–check that the system is operating correctly and that there is no risk of a fault recurring after repairs.
This section gives the fault finding procedures for statuses and parameters and the conditions for checking them.
If a status is not behaving normally or a parameter is outside the permitted tolerance values, consult the
corresponding fault finding page.
Customer complaints - Fault finding chart
If the test with the diagnostic tool is OK but the customer complaint is still present, the fault should be processed by
customer complaints.
A summary of the overall procedure to follow is provided on the following page in the
form of a flow chart.

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Fault finding - Introduction82D
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
Look for damage under the bonnet and in the passenger compartment.
Carefully check the fuses, insulators and wiring harness routing.
Look for signs of oxidation.
Tactile inspection
While manipulating the wiring harness, use the diagnostic tool to note any change in fault status from stored to
present.
Make sure that the connectors are properly locked.
Apply light pressure to the connectors.
Twist the wiring harness.
If there is a change in status, try to locate the source of the fault.
Inspection of each component
Disconnect the connectors and check the appearance of the clips and tabs, as well as the crimping (no crimping on
the insulating section).
Make sure that the clips and tabs are properly locked in the sockets.
Check that no clips or tabs have been dislodged during connection.
Check the clip contact pressure using an appropriate model of tab.
Resistance check
Check the continuity of entire lines, then section by section.
Look for a short circuit to earth, to + 12 V or to another wire.
If a fault is detected, repair or replace the wiring harness.

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Fault finding - Configurations and programming
Replacing the computer
After the injection computer or UCH has been replaced, program the immobiliser code into the new computer
(see 87B, Passenger compartment connection unit, Configuration and programming).
Access/Safety function configurations in the UCH
–Individual configuration available using the diagnostic tool, and the associated configuration should be read
Procedure to follow for modifying these configurations
–establish dialogue with the computer corresponding to the desired configuration.
–select the "repair mode" menu,
–select the "enter configuration" menu,
–select the line corresponding to the configuration to be modified,
–in the drop-down menu, select the line corresponding to the vehicle equipment level or to the customer selection
and click on "confirm",
–In the "Read configuration" menu, check that the configuration has been completed.
SR.*: Sunroof
*RF: radio frequencyEquipment required
Diagnostic toolClip
ConfigurationConfiguration
readingName of configuration Option
CF009 LC003Deadlocking WITH/WITHOUT
-LC089Memory key function WITH/WITHOUT
CF108 LC040 "Renault Anti-Intruder Device"WITH/WITHOUT
CF009 LC003 "Deadlocking"WITH/WITHOUT
CF192 LC093 "Central door locking"WITH/WITHOUT
CF195 LC097 "Type of key" STANDARD/RF*
CF229 LC126 "Alarm"WITH/WITHOUT
CF031 - "Calibration"-
CF173 LC070 "One-touch window(s)/SR*"WITH/WITHOUT
Note:
If configuration LC089 "Memory key function" is WITH and if status ET407 "Memory key" is YES, the UCH
allows the vehicle information stored in the key to be used.
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Fault finding - Fault Finding Chart82D
ALP 25
CONTINUED 1
Is status ET239 "Ignition switch position" "APC"?
YES
Are there any faults on the UCH?
NO
Are there any faults on the injection system?
NO
Is status ET008 "UCH blank" "Yes"?
NO
Is status ET185 "Key code received" "Yes"?
YES
Is status ET229 "Injection immobiliser code"
"Programmed"?
YES
Is status ET250 "Injection" "Protected"?
NO
NORefer to the interpretation of status ET239
"Ignition switch position" (see 87B,
Passenger compartment connection unit).
YESDeal with any faults connected to the UCH
(see 87B, Passenger compartment
connection unit).
YESDeal with any faults connected to the injection
system (see 13B, Diesel injection and see
also 17B, Petrol injection).
YESProgram the UCH using command SC004
"UCH programming" and allocate the key
using command SC015 "Key allocation".
NO
NOProgram the injection code using command
SC017 "Injection immobiliser programming".
YESIf status ET077 "Impact detected" (available
in the injection system) is "Present", carry
out fault finding on the airbag (see 88C, Airbag
and pretensioners) otherwise carry out fault
finding on the injection system (see 13B, Diesel
injection and see also 17B, Petrol injection).
AFTER REPAIRCarry out another fault finding check on the system.
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