2009 RENAULT TWINGO Chasiss ABS Workshop Manual

38C-57
MR-413-X44-38C000$752_eng.mif
V1
38C
ANTI-LOCK BRAKING SYSTEM
Fault finding - Dealing with command modes
CLEARING
RZ001: Fault memory.
This command is used for clearing the computer's stored faults.
SPECIAL COMMANDS
SC001: Check target teeth.
This command tests the condition of the teeth on each wheel.
Select command SC001 "Check target teeth" and follow the instructions.
The test result should indicate 48 sprockets.
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$752_eng.mif

38C-58
MR-413-X44-38C000$799_eng.mif
V1
38C
ANTI-LOCK BRAKING SYSTEM
Fault finding - Command summary table
Tool command Diagnostic tool title
AC003Front left-hand wheel solenoid valves
AC004Front right-hand wheel solenoid valves
AC005Rear left-hand wheel solenoid valves
AC006Rear right-hand wheel solenoid valves
AC016Pump motor test
AC153Bleed front left-hand wheel
AC154Bleed front right-hand wheel
AC155Bleed rear left-hand wheel
AC156Bleed rear right-hand wheel
AC195Vehicle speed signal
AC196Hazard warning light activation request
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$799_eng.mif

38C-59
MR-413-X44-38C000$846_eng.mif
V1
38C
ANTI-LOCK BRAKING SYSTEM
Fault finding - Dealing with command modes
AC003
AC004
AC005
AC006FRONT LEFT-HAND WHEEL SOLENOID VALVES
FRONT RIGHT-HAND WHEEL SOLENOID VALVES
REAR LEFT-HAND WHEEL SOLENOID VALVES
REAR RIGHT-HAND WHEEL SOLENOID VALVES
NOTESConditions of use of the command.
Ignition on, engine stopped and vehicle speed zero.
Before using the commands, check that the battery is fully charged.
The previous 4 commands allow the hydraulic check of each wheel.
Raise the vehicle in order to be able to rotate the wheels, and check that they rotate freely.
Keep the brake pedal depressed to prevent the wheel being tested from being turned by hand (do not brake so
firmly that full braking power is reached).
Select and confirm the command of the wheel being examined (e.g. Front left-hand wheel solenoid valves, etc.)
Turn the wheel concerned by hand; 5 locking/unlocking cycles should be noted on the wheel.
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ABS_V04_AC003 / ABS_V04_AC004
ABS_V04_AC005 / ABS_V04_AC006
MK70 ABS
Vdiag No: 04
MR-413-X44-38C000$846_eng.mif

38C-60
MR-413-X44-38C000$846_eng.mif
V1
ANTI-LOCK BRAKING SYSTEM
Fault finding - Dealing with command modes
MK70 ABS
Vdiag No: 04
38C
AC016
PUMP MOTOR TEST
NOTESConditions of use of the command.
Ignition on, engine stopped and vehicle speed zero.
Before using the command, check that the battery is fully charged.
This command is used to test the pump motor control circuit.
Select command AC016 Pump Motor Test.
The motor must run for 5 seconds.
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ABS_V04_AC016

38C-61
MR-413-X44-38C000$846_eng.mif
V1
ANTI-LOCK BRAKING SYSTEM
Fault finding - Dealing with command modes
MK70 ABS
Vdiag No: 04
38C
AC153
AC154
AC155
AC156BLEED FRONT LEFT-HAND WHEEL
BLEED FRONT RIGHT-HAND WHEEL
BLEED REAR LEFT-HAND WHEEL
BLEED REAR RIGHT-HAND WHEEL
NOTESConditions of use of the command.
Ignition on, engine stopped and vehicle speed zero.
Before using the commands, check that the battery is fully charged.
These 4 commands should only be used if you observe lengthening of the brake pedal travel during a road test
with ABS regulation (the system should have been bled in advance using the conventional procedure).
See ALP8.
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ABS_V04_AC153 / ABS_V04_AC154
ABS_V04_AC155 / ABS_V04_AC156

38C-62
MR-413-X44-38C000$846_eng.mif
V1
ANTI-LOCK BRAKING SYSTEM
Fault finding - Dealing with command modes
MK70 ABS
Vdiag No: 04
38C
AC195
VEHICLE SPEED SIGNAL
NOTESConditions of use of the command.
Ignition on, engine stopped and vehicle speed zero.
Before using the command, check that the battery is fully charged.
This command is used to generate a speed other than 0 mph at the computer's vehicle speed wire output
(connection 47F) for users of that signal (radio, sunroof).
This command has no visible effect on the dashboard speedometer needle.
–Radio: Turn on the radio and make sure that the Adjust volume as a function of speed function is active.
Run command AC195. During the command, you should notice the volume of the sound increase and then
decrease. (See 86A, radio).
–Sunroof: This command has no visible effect on the sunroof. This command changes the activation threshold
of the anti-pinch system (the energy required to close the sunroof varies with vehicle speed due to aerodynamic
constraints). (See 87D ELECTRIC WINDOWS - SUNROOF).
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ABS_V04_AC195

38C-63
MR-413-X44-38C000$846_eng.mif
V1
ANTI-LOCK BRAKING SYSTEM
Fault finding - Dealing with command modes
MK70 ABS
Vdiag No: 04
38C
AC196
HAZARD WARNING LIGHT ACTIVATION REQUEST
NOTESConditions of use of the command.
Ignition on, engine stopped and vehicle speed zero.
Before using the command, check that the battery is fully charged.
This command sends a hazard warning light activation request to the UCH (Passenger compartment connection
unit) to test their operation in the event of emergency braking (depending on UCH, Passenger Compartment
Connection Unit configuration).
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
ABS_V04_AC196

38C-64
MR-413-X44-38C000$893_eng.mif
V1
38C
ANTI-LOCK BRAKING SYSTEM
Fault finding - Customer complaints
NOTESOnly consult this customer complaint after a complete check with the
diagnostic tool.
FAULTS DETECTED ON BRAKING WITH ABS/BRAKING REGULATION
LOCKING OF ONE OR MORE WHEELS ALP 2
PULLING ALP 3
DRIFT ALP 4
UNEXPECTED ABS OPERATION AT LOW SPEEDS AND SLIGHT PEDAL
PRESSURE ALP 5
UNEXPECTED ABS OPERATION ON A POOR ROAD SURFACE ALP 6
UNEXPECTED ABS OPERATION WHEN SPECIAL EQUIPMENT
USED (CAR PHONE, CB, ETC.) ALP 7
EXTENSION OF BRAKE PEDAL TRAVEL FOLLOWING
REGULATION PHASE (WITH LEAKING PEDAL WHEN STARTING
REGULATION PHASE)ALP 8
SPONGY PEDAL ALP 9
BRAKE PEDAL VIBRATION ALP 10
NOISES FROM THE PUMP, PIPES OR HYDRAULIC UNIT ALP 11
OTHER CASES
NO DIALOGUE WITH THE ABS COMPUTER ALP 1
MK70 ABS
Vdiag No: 04
MR-413-X44-38C000$893_eng.mif