2009 RENAULT TWINGO Chasiss ABS Workshop Manual

38C-49
MR-413-X44-38C000$517_eng.mif
V1
ANTI-LOCK BRAKING SYSTEM
Fault finding - Interpretation of faults
MK70 ABS
Vdiag No: 04
38C
DF250
DF251
DF252
DF253
DF254
PRESENT
OR
STOREDENGINE SPEED MULTIPLEX SIGNAL
AVERAGE EFFECTIVE TORQUE MULTIPLEX SIGNAL
TORQUE REQUEST MULTIPLEX FEEDBACK SIGNAL
CALCULATED TORQUE MULTIPLEX SIGNAL
RESISTING TORQUE MULTIPLEX SIGNAL
NOTESSpecial notes:
Although it is stored in the computer, the ABS system is not faulty.
Perform fault finding on the injection system using the diagnostic tool.
Note:
The injection computer does not always store these transient faults as quickly as the
ABS computer.
If no fault is stored in the injection computer, start the engine; if there is no fault
present, contact the Techline. After solving the injection system problem, erase
the faults from the ABS computer memory.
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present when the engine is started up.
Carry out fault finding on the injection system (see MR413 Fault Finding, 13B, Diesel injection or 17B,
Petrol injection).
If the fault is still present, contact the Techline.
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ABS_V04_DF250 / ABS_V04_DF251
ABS_V04_DF252 / ABS_V04_DF253 / ABS_V04_DF254

38C-50
MR-413-X44-38C000$517_eng.mif
V1
ANTI-LOCK BRAKING SYSTEM
Fault finding - Interpretation of faults
MK70 ABS
Vdiag No: 04
38C
DF311
PRESENT
OR
STOREDNO BVR MULTIPLEX SIGNAL
NOTESSpecial notes:
Even though it is stored in the computer, this fault does not cause the warning lights to
come on or a fault message, because the ABS system is not faulty.
Perform fault finding on the BVR (sequential gearbox) using the diagnostic tool.
Note:
After repairing the fault in the BVR (sequential gearbox), clear the fault memory
in the ABS system.
Priority in the event of a number of faults:
Deal with fault DF152 Multiplex network first if it is present or stored.
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present when the engine is started up.
Check the gearbox type configuration with the diagnostic tool, using command LC008 Gearbox type.
If the configuration is not correct, configure the gearbox type present on the vehicle using configuration command
CF079 Gearbox type.
Check the BVR (sequential gearbox) using the diagnostic tool.
Run a multiplex network test (see 88B, Multiplex).
If the fault is still present, contact the Techline.
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ABS_V04_DF311

38C-51
MR-413-X44-38C000$564_eng.mif
V1
38C
ANTI-LOCK BRAKING SYSTEM
Fault finding - Conformity check
SUB-FUNCTION: BRAKE REGULATION
NOTESOnly check conformity after a full check with the diagnostic tool.
Order FunctionParameter or Status
checked or ActionDisplay and Notes Fault finding
1Diagnostic tool
dialogueABS system Apply ALP1.
2Computer
configurationPR030:Tachometric
indexCheck that the index
entered corresponds to
the tyres fitted to the
vehicle (see Clip help).See Configurations and
Programming (VP007).
3Brake pedal not
depressed
detectionET017:Brake pedalStatus "RELEASED"
confirmed, brake pedal
not depressed.If there is a fault, use the
interpretation for ET017
Brake pedal.
4Depressed
brake pedal
detectionET017:Brake pedalStatus "DEPRESSED"
confirmed, brake pedal
depressed.If there is a fault, use the
interpretation for ET017
Brake pedal.
5Vehicle
parameter
readingPR063: Vehicle
parametersCheck that the version
corresponds to the
vehicle being tested
(see the Clip Help)See Configuration and
programming
(VP004 "Vehicle
parameters").
6Gearbox type
readingLC008:Gearbox typeCheck that the gearbox
selected corresponds to
that fitted on the vehicle.See Configuration and
programming
(CF079 "Gearbox type").
ABS_V04_CCONF
MK70 ABS
Vdiag No: 04
MR-413-X44-38C000$564_eng.mif

38C-52
MR-413-X44-38C000$611_eng.mif
V1
38C
ANTI-LOCK BRAKING SYSTEM
Diagnostic - Summary table of statuses and parameters
ABS STATUS SUMMARY TABLE
ABS PARAMETER SUMMARY TABLETool status Diagnostic tool title
ET017Brake pedal
Tool parameter Diagnostic tool title
PR001Front right-hand wheel speed
PR002Front left-hand wheel speed
PR003Rear right-hand wheel speed
PR004Rear left-hand wheel speed
PR005Computer feed voltage
PR030Tachometric index
PR038Vehicle speed
PR063Vehicle parameters
MK70 ABS
Vdiag No: 04
MR-413-X44-38C000$611_eng.mif

38C-53
MR-413-X44-38C000$658_eng.mif
V1
38C
ANTI-LOCK BRAKING SYSTEM
Fault finding - Interpretation of statuses
ET017
BRAKE PEDAL
NOTESSpecial notes:
Only carry out the checks if the PRESSED and RELEASED statuses are inconsistent
with the pedal position.
Use the Technical Note wiring diagram for New Twingo.
STATUS
"RELEASED"
Brake pedal
depressed
If brake lights operate:
–Check the continuity of connection 65A between components 160 and 1094.
If the connector is faulty (see NT6015, Repairing electrical wiring, wiring: Precaution
for repairs), repair the connector, otherwise replace the wiring.
If the brake lights are not working:
–Check the condition, mounting and adjustment of the brake light switch and the
conformity of the bulbs.
–Remove the brake light switch and check that it is operating correctly:
Connection continuity Connection insulation
Switch pressed
(Brake pedal released)AP10 and 5A AP10 and 65A
Switch released
(Brake pedal depressed)AP10 and 65A AP10 and 5A
–Replace the switch if necessary.
Intermediate connector R107 and component 160 and 1081 disconnected:
–Check the continuity and insulation of connection AP10 between
component 1016 and intermediate connector R107.
–Check the continuity and insulation of connection AP10 between
component 160 and intermediate connector R107.
If the connector is faulty (see NT6015, Repairing electrical wiring, wiring:
Precaution for repairs), repair the connector or the wiring, otherwise replace the
wiring.
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ABS_V04_ET017
MK70 ABS
Vdiag No: 04
MR-413-X44-38C000$658_eng.mif

38C-54
MR-413-X44-38C000$658_eng.mif
V1
MK70 ABS
Vdiag No: 04ANTI-LOCK BRAKING SYSTEM
Fault finding - Interpretation of statuses38C
ET017
CONTINUED 1
Connectors of components 645, 172, 173, 639 and 1094, intermediate connectors
R107 and R15 and connector of component 119 (if present on the vehicle)
disconnected from connection 65A:
–Check the insulation of connection 65A between component 160 and
intermediate connector R107.
–Check the insulation of connection 65A between component 172 and
intermediate connector R107.
–Check the insulation of connection 65A between component 173 and
intermediate connector R107.
–Check the insulation of connection 65A between intermediate connectors R107
and R15.
–Check the insulation of connection 65A between component 639 and
intermediate connector R15.
–Check the insulation of connection 65A between component 645 and
intermediate connector R107.
If the connector is faulty (see NT6015, Repairing electrical wiring, wiring:
Precaution for repairs), repair the connector, otherwise replace the wiring.
–Check for + 12 V after ignition feed on connection AP10 of component 1016 to
earth MAH.
If the checks reveal no faults, carry out a check of each component associated with
connection 65A and AP10 (short circuits).
Check the condition and positioning of the F5 5A fuse (see MR411 Mechanical
systems, 81C, Fuses: 16A).
–Check the condition, mounting and adjustment of the brake light switch and the
conformity of the bulbs.
–Remove the brake light switch and check that it is operating correctly:
Connection continuity Connection insulation
Switch pressed
(Brake pedal released)AP10 and 5A AP10 and 65A
Switch released
(Brake pedal
depressed)AP10 and 65A AP10 and 5A
–Replace the switch if necessary.
Connectors of components 645, 172, 173, 639 and 1094, intermediate
connectors R107 and R15 and connector of component 119 (if present on the vehicle)
disconnected from connection 65A
–Check the insulation of connection 65A between component 160 and
intermediate connector R107.
STATUS
DEPRESSED:
Brake pedal
released
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.

38C-55
MR-413-X44-38C000$658_eng.mif
V1
ANTI-LOCK BRAKING SYSTEM
Fault finding - Interpretation of statuses
MK70 ABS
Vdiag No: 04
38C
ET017
CONTINUED 2
–Check the insulation of connection 65A between component 172 and intermediate connector R107.
–Check the insulation of connection 65A between component 173 and intermediate connector R107.
–Check the insulation of connection 65A between intermediate connectors R107 and R15.
–Check the insulation of connection 65A between component 639 and intermediate connector R15.
–Check the insulation of connection 65A between component 645 and intermediate connector R107.
If the connector is faulty (see NT6015, Repairing electrical wiring, wiring: Precaution for repairs),
repair the connector, otherwise replace the wiring.
If the checks reveal no faults, carry out a check of each component associated with connection 65A
(internal component faults).
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.

38C-56
MR-413-X44-38C000$705_eng.mif
V1
38C
ANTI-LOCK BRAKING SYSTEM
Fault finding - Dealing with computer statuses and parameters
PARAMETERS
PR001: Front right-hand wheel speed.
PR002: Front left-hand wheel speed.
PR003: Rear right-hand wheel speed.
PR004: Rear left-hand wheel speed.
These parameters indicate the speed in mph (km/h) of each wheel on the vehicle.
PR005: Computer supply voltage.
This parameter indicates the computer supply voltage in volts.
PR030: Tachometric index.
This parameter specifies the tachometric index entered in the computer for the tyres fitted to the vehicle.
PR038: Vehicle speed.
This parameter indicates the vehicle speed in mph (km/h).
PR063: Vehicle parameters.
This parameter shows whether the configuration (VP004 "Vehicle parameters") matches the vehicle
undergoing fault finding.
STATUS
ET017: Brake pedal
This status gives the position (depressed or released) of the brake pedal
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
MK70 ABS
Vdiag No: 04
MR-413-X44-38C000$705_eng.mif