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 112 of 139
AUTOMATIC TRANSMISSION
Fault finding - Interpretation of parameters23A
23A - 112V5 MR-372-J84-23A100$696.mif
SIEMENS TA2005
Vdiag No.: 14-18
PR006
ENGINE SPEED
NOTESThere must be no present or stored faults.
Run a multiplex network test (see 88B, Multiplex).
After these checks, if parameter PR006 Engine speed is absent, refer to the interpretation of the parameter
(see 17B, Petrol injection or 13B, Diesel injection).
AFTER REPAIRRepeat the conformity check from the start.
DP0TA2005_V14_PR006/DP0TA2005_V18_PR006
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 117 of 139
AUTOMATIC TRANSMISSION
Fault finding - Interpretation of parameters23A
23A - 117V5 MR-372-J84-23A100$696.mif
SIEMENS TA2005
Vdiag No.: 14-18
PR123
CALCULATED ENGINE TORQUE
NOTESThere must be no present or stored faults.
Run a multiplex network test (see 88B, Multiplex).
If parameter PR123 Calculated engine torque is absent, refer to the interpretation of the parameter (see 17B,
Petrol injection or 13B, Diesel injection).
AFTER REPAIRRepeat the conformity check from the start.
DP0TA2005_V14_PR123/DP0TA2005_V18_PR123
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 120 of 139
AUTOMATIC TRANSMISSION
Fault finding - Interpretation of parameters23A
23A - 120V5 MR-372-J84-23A100$696.mif
SIEMENS TA2005
Vdiag No.: 14-18
PR128
ENGINE/TURBINE SPEED DIFFERENCE
NOTESThere must be no present or stored faults.
Check the cleanliness and condition of the engine speed sensor and its connections.
Run a multiplex network test (see 88B, Multiplex).
After these checks, if parameter PR006 Engine speed is absent, refer to the interpretation of the parameter
(see 17B, Petrol injection or 13B, Diesel injection).
Check the cleanliness and condition of the turbine speed sensor and its connections.
This parameter is the difference between parameter PR006 Engine speed and parameter PR007 Turbine speed.
Check the engine/turbine speed difference with the diagnostic tool:
Engine idling:
Engine speed: ~ 743 rpm and turbine speed: ~ 654 rpmdifference = ~ 89 rpm.
AFTER REPAIRRepeat the conformity check from the start.
DP0TA2005_V14_PR128/DP0TA2005_V18_PR128
Page 123 of 139
AUTOMATIC TRANSMISSION
Fault finding - Interpretation of parameters23A
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SIEMENS TA2005
Vdiag No.: 14-18
PR138
REFERENCE PRESSURE
NOTESThere must be no present or stored faults.
The reference pressure is determined by the automatic transmission computer.
Check the reference pressure on the diagnostic tool:
–engine not running: pressure reading 21 bar.
–engine at idle speed (~ 700 rpm) and selector lever at D or R: pressure reading ~ 2.7 bar.
–engine speed ~ 1400 rpm and gear lever at D or R: pressure reading ~ 8.9 bar.
AFTER REPAIRRepeat the conformity check from the start.
DP0TA2005_V14_PR138/DP0TA2005_V18_PR138
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