display RENAULT TWINGO RS 2009 2.G Chasiss - Power Assisted Steering Workshop Manual

36B-3
MR-413-X44-36B000$067.mif
V2
POWER – ASSISTED STEERING
Fault finding – Introduction
EPAS
Vdiag No.: 04 - 08
36B
Faults
Faults are declared present or stored (depending on whether they appeared in a certain context and have
disappeared since, or whether they remain present but are not 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 defective,
–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.

36B-25
MR-413-X44-36B000$536.mif
V2
36B
POWER – ASSISTED STEERING
Fault finding – Conformity check
MAIN SCREEN
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool.
Application conditions: ignition on, engine stopped, no movement of
the steering wheel, front wheels set straight ahead.
FunctionParameter or Status
Checked or ActionDisplay and notes Fault finding
Wire informationPR003:Vehicle speedX = 0 mph (km/h)In the event of a fault, apply the
interpretation of parameter
PR003.
PR004: Engine speed0 = rpmIn the event of a fault, apply the
interpretation of parameter
PR004.
AssistancePR001: Torque applied
to the steering
wheel0 Nm (+ 0.2 Nm)In the event of a fault, apply the
interpretation of parameter
PR001.
Steering wheel
angle
(Vdiag 04 only)PR121:Steering wheel
angle- 5˚ < X < 5˚In the event of a fault, apply the
interpretation of parameter
PR121.
EPAS
Vdiag No.: 04 - 08
MR-413-X44-36B000$536.mif
DAE_V04_CCONF/DAE_V08_CCONF

36B-26
MR-413-X44-36B000$536.mif
V2
POWER – ASSISTED STEERING
Fault finding – Conformity check
EPAS
Vdiag No.: 04 - 08
36B
SUB-FUNCTION: ASSISTANCE
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool.
Application conditions: ignition on, engine stopped, no movement of
the steering wheel, front wheels set straight ahead.
FunctionParameter or Status
Checked or ActionDisplay and notes Fault finding
Power supplyPR032:Feed voltage0 VIn the event of a fault on this
parameter, apply the fault finding
procedure of DF037 Battery voltage.
Wire informationPR003:Vehicle speed0 mphIn the event of a fault, apply the
interpretation of parameter PR003.
PR004:Engine speed0 rpmIn the event of a fault, apply the
interpretation of parameter PR004.
Steering wheel
angle
(Vdiag 04 only)ET020:Steering
wheel angle
sensor
programmingNot programmedIn the event of a fault, apply the
interpretation of status ET020.
PR121:Steering
wheel angle- 5˚ < X < 5˚In the event of a fault, apply the
interpretation of parameter PR121.
FaultsET021:Motor thermal
protection
indicatorNot activeIn the event of a fault, apply the
interpretation of status ET021.
ET025:Fault indicatorOffIn the event of a fault, apply the
interpretation of status ET025.

36B-27
MR-413-X44-36B000$536.mif
V2
POWER – ASSISTED STEERING
Fault finding – Conformity check
EPAS
Vdiag No.: 04 - 08
36B
SUB-FUNCTION: ASSISTANCE (CONTINUED)
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool.
Application conditions: ignition on, engine stopped, no movement of the
steering wheel, front wheels set straight ahead.
FunctionParameter or Status
Checked or ActionDisplay and notes Fault finding
AssistancePR001:Torque applied
to the steering
wheel0 Nm (+ 0.2 Nm)In the event of a fault, apply the
interpretation of parameter
PR001.
OutputPR132:Current setpoint
(45 A)0 A
Note: these two
parameters must be
approximately the
same.In the event of a fault, apply the
interpretation of parameters
PR132 and PR130.
PR130:Motor power
(45 A)
PR131:Current setpoint
(60 A)0 A
Note: these two
parameters must be
approximately the
same.In the event of a fault, apply the
interpretation of parameters
PR131 and PR129.
PR129:Motor power
(60 A)

36B-28
MR-413-X44-36B000$536.mif
V2
POWER – ASSISTED STEERING
Fault finding – Conformity check
EPAS
Vdiag No.: 04 - 08
36B
MAIN SCREEN
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool.
Application conditions: engine at idle speed, no movement of the steering
wheel, front wheels straight ahead.
FunctionParameter or Status
Checked or ActionDisplay and notes Fault finding
Wire informationPR003:Vehicle speed0 mphIn the event of a fault, apply the
interpretation of parameter
PR003.
PR004:Engine speed850 +/- 50 rpmIn the event of a fault, apply the
interpretation of parameter
PR004.
Assistance PR001:Torque applied
to the steering
wheel0 Nm (+ 0.2 Nm)In the event of a fault, apply the
interpretation of parameter
PR001.
Steering wheel
angle
(Vdiag 04 only)PR121:Steering wheel
angle- 5˚ < X < 5˚In the event of a fault, apply the
interpretation of parameter
PR121.

36B-29
MR-413-X44-36B000$536.mif
V2
POWER – ASSISTED STEERING
Fault finding – Conformity check
EPAS
Vdiag No.: 04 - 08
36B
SUB-FUNCTION: ASSISTANCE
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool.
Application conditions: engine at idle speed, no movement of the steering
wheel, front wheels straight ahead.
FunctionParameter or Status
Checked or ActionDisplay and notes Fault finding
Power supplyPR032:Feed voltage12 < X < 16 VIn the event of a fault on this
parameter, apply the fault finding
procedure of DF037 Battery
voltage.
Wire informationPR003: Vehicle speed0 mphIn the event of a fault, apply the
interpretation of parameter
PR003.
PR004:Engine speed850 +/- 50 rpmIn the event of a fault, apply the
interpretation of parameter
PR004.
Steering wheel
angle (Vdiag 04
only)ET020:Steering wheel
angle sensor
programmingNot programmedIn the event of a fault, apply the
interpretation of status ET020.
PR121:Steering wheel
angle- 5˚ < X < 5˚In the event of a fault, apply the
interpretation of parameter
PR121.
FaultsET021:Motor thermal
protection
indicatorNot activeIn the event of a fault, apply the
interpretation of status ET021.
ET025:Fault indicatorOffIn the event of a fault, apply the
interpretation of status ET025.

36B-30
MR-413-X44-36B000$536.mif
V2
POWER – ASSISTED STEERING
Fault finding – Conformity check
EPAS
Vdiag No.: 04 - 08
36B
SUB-FUNCTION: ASSISTANCE (CONTINUED)
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool.
Application conditions: engine at idle speed, no movement of the steering
wheel, front wheels straight ahead.
FunctionParameter or Status
Checked or ActionDisplay and notes Fault finding
AssistancePR001:Torque applied
to the steering
wheel0 Nm (+ 0.2 Nm)In the event of a fault, apply the
interpretation of parameter
PR001.
OutputPR132: Current setpoint
(45 A)0 A
Note: these two
parameters must be
approximately the
same.In the event of a fault, apply the
interpretation of parameters
PR132 and PR130.
PR130: Motor power (45
A)
PR131: Current setpoint
(60 A)0 A
Note: these two
parameters must be
approximately the
same.In the event of a fault, apply the
interpretation of parameters
PR131 and PR129.
PR129: Motor power (60
A)