AUTOMATIC TRANSMISSION
Fault finding - Interpretation of faults
23A
23A - 99V3 MR-372-J84-23A000$495.mif
AJ0 BVA
Vdiag No.: 04, 05
DF304
CONTINUED
Step 1:
Drain the automatic transmission (see, MR 370, Mechanical, 23A Automatic transmission, Oil change) and
remove the transmission housing (see, MR 370, Mechanical, 23A Automatic transmission, Hydraulic
distributor).
Check the continuity and insulation of the following connections on the internal wiring harness:
●Connection code 5KY, between components 119 and the pressure switch on brake 1.
If the connection is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Are the continuity and insulation correct?
If YES, replace the pressure switch on brake 1.
If NO, replace the internal wiring harness.
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition, wait 1 minute and carry out a road test followed by another
check with the diagnostic tool.
AUTOMATIC TRANSMISSION
Fault finding - Interpretation of faults
23A
23A - 101V3 MR-372-J84-23A000$495.mif
AJ0 BVA
Vdiag No.: 04, 05
DF305
CONTINUED
Step 1:
Drain the automatic transmission (see, MR 370, Mechanical, 23A Automatic transmission, Oil change) and
remove the transmission housing (see, MR 370, Mechanical, 23A Automatic transmission, Hydraulic
distributor).
Check the continuity and insulation of the following connections on the internal wiring harness:
●Connection code 5LK, between components 119 and the pressure switch on brake 2.
If the connection is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Are the continuity and insulation correct?
If YES, replace the pressure switch on brake 1.
If NO, replace the internal wiring harness.
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition, wait 1 minute and carry out a road test followed by another
check with the diagnostic tool.
AUTOMATIC TRANSMISSION
Fault finding - Interpretation of faults
23A
23A - 104V3 MR-372-J84-23A000$495.mif
AJ0 BVA
Vdiag No.: 04, 05
DF306
CONTINUED 2
Stage 4:
Drain the automatic transmission (see, MR 370, Mechanical, 23A Automatic transmission, Oil change) and
remove the transmission housing (see, MR 370, Mechanical, 23A Automatic transmission, Hydraulic
distributor).
Disconnect the connector from component 754, measure the resistance of lock-up/brake 1 solenoid valve
(on the connector of the internal wiring harness of the transmission) between the following connections:
●Connection code 5BF.
●Connection code 5LW.
The resistance must be 5.3 ΩΩ Ω Ω
± 0.5 ΩΩ Ω Ω
at 20 ˚C.
Is the resistance correct?
If YES, move on to step 5.
If NO, move on to step 6.
Stage 5:
Measure the continuity and insulation of the following connections:
●Connection code 5BF.
●Connection code 5LW.
Between components R22 and the internal connector in the transmission.
Are the continuity and insulation correct?
If YES, contact the Techline.
If NO, replace the intermediate wiring harness between connector R22 and the internal connector in the
transmission.
Stage 6:
Disconnect the connector from lock-up/brake 1 solenoid valve, measure the resistance of lock-up/brake 1
solenoid valve between the following connections:
●Connection code 5BF.
●Connection code 5LW.
The resistance must be 5.3 ΩΩ Ω Ω
± 0.5 ΩΩ Ω Ω
at 20 ˚C.
Is the resistance correct?
If YES, move on to step 7.
If NO, replace the hydraulic distributor.
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition, wait 1 minute and carry out a road test followed by another
check with the diagnostic tool.
AUTOMATIC TRANSMISSION
Fault finding - Interpretation of faults
23A
23A - 108V3 MR-372-J84-23A000$495.mif
AJ0 BVA
Vdiag No.: 04, 05
DF307
CONTINUED 2
Stage 4:
Drain the automatic transmission (see, MR 370, Mechanical, 23A Automatic transmission, Oil change) and
remove the transmission housing (see, MR 370, Mechanical, 23A Automatic transmission, Hydraulic
distributor).
Disconnect the connector from component 754, measure the resistance of brake 2 solenoid valve
(on the connector of the internal wiring harness of the transmission) between the following connections:
●Connection code 5R.
●Connection code 5LW.
The resistance must be 5.3 ΩΩ Ω Ω
± 0.5 ΩΩ Ω Ω
at 20 ˚C.
Is the resistance correct?
If YES, move on to step 5.
If NO, move on to step 6.
Stage 5:
Measure the continuity and insulation of the following connections:
●Connection code 5R.
●Connection code 5LW.
Between components R22 and the internal connector in the transmission.
Are the continuity and insulation correct?
If YES, contact the Techline.
If NO, replace the intermediate wiring harness between connector R22 and the internal connector in the
transmission.
Stage 6:
Disconnect the connector from brake 2 solenoid valve, measure the resistance of brake 2 solenoid valve
between the following connections:
●Connection code 5R.
●Connection code 5LW.
The resistance must be 5.3 ΩΩ Ω Ω
± 0.5 ΩΩ Ω Ω
at 20 ˚C.
Is the resistance correct?
If YES, move on to step 7.
If NO, replace the hydraulic distributor.
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition, wait 1 minute and carry out a road test followed by another
check with the diagnostic tool.
AUTOMATIC TRANSMISSION
Fault finding - Interpretation of faults
23A
23A - 111V3 MR-372-J84-23A000$495.mif
AJ0 BVA
Vdiag No.: 04, 05
DF307
CONTINUED 5
Stage 3:
Measure the resistance of lock-up/brake 1 solenoid valve (on connector R22) between the following
connections:
●Connection code 5BF.
●Connection code 5LW.
The resistance must be 5.3 ΩΩ Ω Ω
± 0.5 ΩΩ Ω Ω
at 20 ˚C.
Is the resistance correct?
If YES, and if the fault is still there, contact the Techline.
If NO, move on to step 4.
Stage 4:
Drain the automatic transmission (see, MR 370, Mechanical, 23A Automatic transmission, Oil change) and
remove the transmission housing (see, MR 370, Mechanical, 23A Automatic transmission, Hydraulic
distributor).
Disconnect the connector from component 754, measure the resistance of lock-up/brake 1 solenoid valve
(on the connector of the internal wiring harness of the transmission) between the following connections:
●Connection code 5BF.
●Connection code 5LW.
The resistance must be 5.3 ΩΩ Ω Ω
± 0.5 ΩΩ Ω Ω
at 20 ˚C.
Is the resistance correct?
If YES, move on to step 5.
If NO, move on to step 6.
Stage 5:
Measure the continuity and insulation of the following connections:
●Connection code 5BF.
●Connection code 5LW.
Between components R22 and the internal connector in the transmission.
Are the continuity and insulation correct?
If YES, contact the Techline.
If NO, replace the intermediate wiring harness between connector R22 and the internal connector in the
transmission.
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition, wait 1 minute and carry out a road test followed by another
check with the diagnostic tool.
AUTOMATIC TRANSMISSION
Fault finding - Interpretation of parameters
23A
23A - 135V3 MR-372-J84-23A000$765.mif
AJ0 BVA
Vdiag No.: 04, 05AUTOMATIC TRANSMISSION
Fault finding - Interpretation of parameters
PR004
TRANSMISSION OIL TEMPERATURE
PARAMETER
DEFINITIONThis parameter shows the gearbox oil temperature in ˚C.
NOTESSpecial notes:
Only perform these tests if the parameters do not correspond with the system operation
programming.
No faults should be present or stored.
Conformity check with engine running, engine coolant temperature > 80 ˚C
With the engine running at idle speed, the gearbox oil temperature varies in accordance with the engine coolant
temperature.
- 40 ˚C > PR004 > 150 ˚C
In the event of a fault, consult the interpretation of fault DF023 Gearbox oil temperature sensor.
Sensor electrical conformity
Disconnect the connector of component 119, measure the resistance of the oil temperature sensor
(on the connector of component 119) between the following connections:
●Connection code 5BZ,
●Connection code 5BY.
The resistance should be between:
- 4.208 ± 0.42 kΩΩ Ω Ω
at 20 ˚C,
- 1.947 ± 0.19 kΩΩ Ω Ω
at 40 ˚C,
- 0.988 ± 0.09 kΩΩ Ω Ω
at 60 ˚C.
In the event of a fault, consult the interpretation of fault DF023 Gearbox oil temperature sensor.
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
AJ0_V04_PR004/AJ0_V05_PR004
MR-372-J84-23A000$765.mif
AUTOMATIC TRANSMISSION
Fault finding - Interpretation of parameters
23A
23A - 137V3 MR-372-J84-23A000$765.mif
AJ0 BVA
Vdiag No.: 04, 05
PR007
TURBINE SPEED
Note:
Parameter PR007 "Turbine speed" applies to the following sub-functions:
"Gear changes".
"Torque activation".
PARAMETER
DEFINITIONThis parameter shows the gearbox turbine speed in rpm.
NOTESSpecial notes:
Only perform these tests if the parameters do not correspond with the system operation
programming.
No faults should be present or stored.
Conformity check with engine stopped and ignition on
PR007 = 0 rpm
In the event of a fault, consult the interpretation of fault DF038 Turbine speed sensor circuit.
Conformity check with engine running, engine coolant temperature > 80 ˚C
PR007 "Turbine
speed"PR006 "Engine
speed"PR004 "Gearbox
oil temperature"ET013 "Gear
engaged"ET012 "Gear lever
position"
0 rpm≈ 800 rpm 25 ˚C 1 D
≈ 660 rpm≈ 800 rpm 25 ˚CDISENGAGE
(clutch
disengagement)D
In the event of a fault, consult the interpretation of fault DF038 Turbine speed sensor circuit.
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
AJ0_V04_PR007/AJ0_V05_PR007
AUTOMATIC TRANSMISSION
Fault finding - Fault Finding Chart
23A
23A - 160V3 MR-372-J84-23A000$945.mif
AJ0 BVA
Vdiag No.: 04, 05
ALP4The vehicle moves forwards or backwards with the gear lever in
position N
NOTESSpecial notes:
There must be no present or stored electrical faults.
Only consult this customer complaint after a complete check using the diagnostic tool
and a conformity check.
Connect the diagnostic tool to the vehicle and establish dialogue with the automatic transmission computer.
Check statuses ET012 Gear lever position and ET013 Gear engaged; check the consistency between the
display on the tool and the locked positions of the gear lever at the gear lever bridge piece (ignition on and engine
stopped).
Are they consistent?
YES NO
Check the condition and level of the
transmission oil (colour).
Does the condition of the oil suggest there
is an internal fault with the automatic
transmission?
NO
End of fault finding. Review the cause
against the customer complaint.
Check that the selection cable is correctly adjusted
and the gear lever correctly positioned at the lever
position sensor located on the automatic
transmission (see MR 370 mechanical, 37A,
Automatic gear controls, Adjustment).
Carry out a test on the gear selector.
Are they consistent?
NO YES
Contact the Techline
to confirm
replacement of the
automatic
transmission.
End of fault finding.
YES
AFTER REPAIRDeal with any faults detected by the diagnostic tool. Clear the computer memory.
Carry out a road test, then check with the diagnostic tool.
AJ0_V04_ALP04/AJ0_V05_ALP04