Page 110 of 139
AUTOMATIC TRANSMISSION
Fault finding - Interpretation of parameters23A
23A - 110V5 MR-372-J84-23A100$696.mif
SIEMENS TA2005
Vdiag No.: 14-18
PR003
OIL PRESSURE
NOTESThere must be no present or stored faults.
Immobilise the vehicle: handbrake on and brake pedal depressed.
Check the oil pressure values on the diagnostic tool:
–engine not running: pressure reading less than 0.2 bar.
–engine at idle speed (~ 820 rpm) and gear lever at D or R: pressure reading ~ 2.6 bar.
–engine speed ~ 1400 rpm and gear lever at D or R: pressure reading ~ 8.7 bar.
AFTER REPAIRRepeat the conformity check from the start.
DP0TA2005_V14_PR003/DP0TA2005_V18_PR003
Page 113 of 139
AUTOMATIC TRANSMISSION
Fault finding - Interpretation of parameters23A
23A - 113V5 MR-372-J84-23A100$696.mif
SIEMENS TA2005
Vdiag No.: 14-18
PR007
TURBINE SPEED
NOTESThere must be no present or stored faults.
Turbine speed varies according to oil temperature and pressure.
Turbine speed depends on engine speed.
Check the turbine speed on the diagnostic tool:
Gear lever in position N.
Oil temperature 43 ˚C: engine speed ~ 762 rpmturbine speed ~ 681 rpm.
Oil temperature 45 ˚C: engine speed ~ 743 rpmturbine speed ~ 654 rpm.
AFTER REPAIRRepeat the conformity check from the start.
DP0TA2005_V14_PR007/DP0TA2005_V18_PR007
Page 119 of 139

AUTOMATIC TRANSMISSION
Fault finding - Interpretation of parameters23A
23A - 119V5 MR-372-J84-23A100$696.mif
SIEMENS TA2005
Vdiag No.: 14-18
PR126
CURRENT TURBINE SPEED
NOTESThere must be no present or stored faults.
Check the cleanliness and condition of the turbine speed sensor and its connections.
Check the insulation, continuity and the absence of interference resistance to earth, to + 12 V and the
following connections:
●connection code 5DA, between components 119 and 1017,
●connection code 5DB, between components 119 and 1017.
If any of the connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring
repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check the turbine speed on the diagnostic tool:
Gear lever position at N or P.
Oil temperature 43 ˚C: turbine speed ~ 681 rpm and engine speed: ~ 743 rpm.
Oil temperature 45 ˚C: turbine speed ~ 654 rpm and engine speed: ~ 743 rpm.
AFTER REPAIRRepeat the conformity check from the start.
DP0TA2005_V14_PR126/DP0TA2005_V18_PR126
Page 124 of 139

AUTOMATIC TRANSMISSION
Fault finding - Interpretation of parameters23A
23A - 124V5 MR-372-J84-23A100$696.mif
SIEMENS TA2005
Vdiag No.: 14-18
PR146
DIFFERENCE BETWEEN REFERENCE PRESSURE AND OIL
PRESSURE
NOTESThere must be no present or stored faults.
The reference pressure values are stored in the transmission computer memory and depend on how the vehicle
is used.
The oil pressure is regulated according to the reference pressure. The oil pressure values must always be close
to the reference pressure.
This parameter is the difference between parameter PR138 Reference pressure and parameter PR003 Oil
pressure.
–engine not running: reference pressure reading 21 bar.
oil pressure reading = 0 bar.
–engine at idle speed (~ 700 rpm) and selector lever at D or R: reference pressure reading ~ 2.7 bar.
oil pressure reading = ~ 2.6 bar.
–engine speed ~ 1400 rpm and selector lever at D or R: reference pressure reading ~ 8.9 bar.
oil pressure reading = ~ 8.7 bar.
AFTER REPAIRRepeat the conformity check from the start.
DP0TA2005_V14_PR146/DP0TA2005_V18_PR146
Page 127 of 139
Fault finding - Customer complaints23A
23A - 127V5 MR-372-J84-23A100$870.mif
SIEMENS TA2005
Vdiag No.: 14-18AUTOMATIC TRANSMISSION
Fault finding - Customer complaints
NOTESOnly refer to Customer complaints after carrying out a complete fault finding
procedure with the diagnostic tool and the conformity check.
NO DIALOGUE WITH THE COMPUTER ALP1
ENGINE STARTING FAULTSALP2
AUTOMATIC TRANSMISSION OPERATING FAULTS ALP3
AUTOMATIC TRANSMISSION MALFUNCTIONING ON GEAR CHANGING ALP4
ERRATIC GEAR CHANGESALP5
REVERSING LIGHTS DO NOT WORK ALP6
OIL UNDER THE VEHICLEALP7
MR-372-J84-23A100$870.mif
Page 130 of 139

AUTOMATIC TRANSMISSION
Fault finding - Fault Finding Chart23A
23A -130V5 MR-372-J84-23A100$928.mif
SIEMENS TA2005
Vdiag No.: 14-18
Start with the ALP1 cycle
ALP3 Automatic transmission operating faults
NOTESOnly refer to Customer complaints after carrying out a complete fault finding
procedure with the diagnostic tool and the conformity check.
If the engine races when shifting from 1/2 when cold (automatic transmission oil
temperature less than 15˚C), replace the pressure modulating solenoid valve
(EVM).
Use the diagnostic tool to check the
consistency between the display and the gear
lever positions (ignition on and engine
stopped).Adjust the control settings following the
instructions provided (see MR 370, Mechanical,
23 A, Automatic Transmission, Automatic
transmission control unit (for Mégane II and
Scénic II)).
Are they consistent?
Check the oil level and the condition of the oil
(colour, odour, etc.).Replace the automatic transmission (see MR 364,
Mechanical, 23A, Automatic transmission,
Removal-Refitting (for Mégane II) and MR 370,
Mechanical, 23A, Automatic transmission,
Removal-Refitting (for Scénic II)). Does the condition of the oil suggest there
is an internal fault in the automatic
transmission?
With the engine stopped, check the line
pressure information provided by the pressure
sensor (PR003 Oil pressure).Replace the pressure sensor (see MR 364,
Mechanical, 23A, Automatic transmission,
Pressure sensor (for Mégane II) and MR 370,
Mechanical, 23A, Automatic transmission,
Pressure sensor (for Scénic II)).
Is the value higher than 0.2 bar?
NO
YES
YES
NO
YES
NO
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
DP0TA2005_V14_ALP03/DP0TA2005_V18_ALP03
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AUTOMATIC TRANSMISSION
Fault finding - Fault Finding Chart23A
23A -131V5 MR-372-J84-23A100$928.mif
SIEMENS TA2005
Vdiag No.: 14-18
ALP3
CONTINUED 1
Check the oil level.
Check the oil pressure using PR003 Oil pressure:
Warm engine with gearbox oil temperature between 65 and 90˚C.
Measure the line pressure under the 3 following conditions:
IMPORTANT
The vehicle must be stationary: handbrake on and brake pedal depressed, no accessories operating
(e.g.: air conditioning)
1engine speed idling:
Shift the gear lever to R, N and D, the pressure reading must be greater than 2.5 bars.
2engine speed at 1200 rpm:
–gear lever in R position, the pressure reading must be greater than 4 bars.
–gear lever in D position, the pressure reading in first gear must be greater than 5.5 bars.
3engine speed at 2200 rpm:
–gear lever in R position, the pressure reading must be greater than 11 bars.
–gear lever in D position, the pressure reading in first gear must be greater than 11 bars.
Do the recorded values correspond to the specified values?
Shift the gear lever into position D and monitor
PR007 Turbine speed when accelerating.Replace the pressure modulating solenoid valve
and the oil. Repeat the check after replacement.
If the fault is still present, replace the hydraulic
distributor and all the solenoid valves (see MR 364
Mechanical, 23A, Automatic transmission,
Hydraulic distributor (for Mégane II) and MR 370
Mechanical, 23A, Automatic transmission,
Hydraulic distributor (for Scénic II)).
Does the turbine speed change?
Replace the automatic transmission (see MR 364, Mechanical, 23A,
Automatic transmission, Removal-Refitting (for Mégane II) and MR
370, Mechanical, 23A, Automatic transmission, Removal-Refitting
(for Scénic II)).
A
YESNO
NOYES
B
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
Page 132 of 139

AUTOMATIC TRANSMISSION
Fault finding - Fault Finding Chart23A
23A -132V5 MR-372-J84-23A100$928.mif
SIEMENS TA2005
Vdiag No.: 14-18
ALP3
CONTINUED 2
Refer to the procedure and the safety instructions for carrying out a setting point check on the torque converter.
Theoretical engine speed at setting point: 2300 ± 150 rpm
Is the value of the setting point wrong or is there an internal noise in the converter?
Carry out a road test, observing the engine speed
on the instrument panel and the information
displayed on the diagnostic tool (PR006 Engine
speed)Replace the torque converter, the lock-up solenoid
valve and the oil. If the oil is burnt, also replace the
hydraulic distributor and all the solenoid valves
(see MR 364 Mechanical, 23A, Automatic
transmission, Hydraulic distributor
(for Mégane II) and MR 370 Mechanical, 23A,
Automatic transmission, Hydraulic distributor
(for Scénic II)).
When replacing the torque converter, ensure that the
reaction shaft is securely attached to the hub of the
oil pump (flanged shaft).
Note:
A setting point which is too low may be due to a lack
of engine power. Does the engine speed change each time
there is a gear change?
The checks carried out have not provided any
evidence of a fault and the automatic
transmission appears to be working correctly.
If the vehicle does show the customer complaint
selected, continue with the entire fault finding
procedure.Replace the hydraulic distributor and all the solenoid
valves. (see MR 364 Mechanical, 23A, Automatic
transmission, Hydraulic distributor
(for Mégane II) and MR 370 Mechanical, 23A,
Automatic transmission, Hydraulic distributor
(for Scénic II)).
B
NO
NOYES
YESNO
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.