AUTOMATIC TRANSMISSION
Fault finding - Role of components
23A
23A - 16V3 MR-372-J84-23A000$225.mif
AJ0 BVA
Vdiag No.: 04, 05
"PRESSURE CONTROL" FUNCTION:
Purpose of this function:
The purpose of this function is to regulate the oil pressure inside the transmission hydraulic distributor.
"Lever selection"
function
"Pressure
control"
function Oil temperature
Line pressure solenoid
valve
Vehicle speed
Turbine speed
–Accelerator pedal
position
–Engine speed
–Engine torqueCAN
"Gear change" function
AUTOMATIC TRANSMISSION
Fault finding - Role of components
23A
23A - 17V3 MR-372-J84-23A000$225.mif
AJ0 BVA
Vdiag No.: 04, 05
"CONVERTER lock-up" FUNCTION:
Aim of this function: The aim of this function is to lock up the converter.
–lock-up/release definition:
The converter is a hydraulic clutch which provides a hydraulic connection between the engine and the automatic
transmission pressure plate.
The purpose of the lock-up function is to lock the turbine and the converter casing together, transforming a hydraulic
connection into a mechanical connection. The role of the lock-up function is to prevent slipping losses.
EVS2*: sequence solenoid valve 2."Lever selection"
function
"Converter
lock-up"
functionLock-up and brake 1
solenoid valve
Solenoid valve EVS2*
Oil temperature
Vehicle speed
Turbine speed
Brake pedal action
"Torque management"
function
–Accelerator pedal
position
–Engine speed
–Engine torqueCAN
"Gear change" function
AUTOMATIC TRANSMISSION
Fault finding - Replacement of components
23A
23A-24V3 MR-372-J84-23A000$270.mif
AJ0 BVA
Vdiag No.: 04, 05
Replacing the transmission computer:
Remove the automatic transmission computer (see MR 370 mechanical, 23A, Automatic transmission,
Automatic transmission computer, Removal - Refitting).
Refit the automatic transmission computer (see MR 370 mechanical, 23A, Automatic transmission,
Automatic transmission computer, Removal - Refitting).
Establish dialogue with the diagnostic tool.
Use command VP001 Enter VIN.
Run command VP009 Write last After-Sales Service operation date.
Do not carry out any automatic programming if replacing the automatic transmission computer. Automatic
programming is finalised when the vehicle is driven.
In order to optimise the automatic programming before delivering the vehicle to the customer, apply the
"Programming procedure" shown below.
Replacing the hydraulic distributor:
Remove the transmission hydraulic distributor (see MR 370 mechanical, 23A, Automatic transmission,
Hydraulic distributor, Removal - Refitting).
Refit the transmission hydraulic distributor (see MR 370 Mechanical, 23A, Automatic transmission, Hydraulic
distributor, Removal - Refitting).
Replacing the automatic transmission
Remove the transmission (see MR 370,Mechanical, 23A, Automatic transmission, Removal - Refitting).
Refit the transmission (see MR 370, Mechanical, 23A, Automatic transmission, Removal - Refitting).
Establish communication with the diagnostic tool.
Initialise all the programming, use the command RZ009 Self-adapting clearing (Vdiag05 only).
Run command VP009 Write last After-Sales Service operation date.
The self-programming functions are performed when the vehicle is being driven.
In order to optimise the automatic programming before delivering the vehicle to the customer, apply the
"Programming procedure" shown below.
* APV: After-SalesPROGRAMMING PROCEDURE:
Programming conditions:
The automatic gearbox oil temperature should be between 60˚C and 100˚C.
Stationary, engine running, brake pedal depressed:
Engage neutral at least 5 times to consolidate the programming.
While driving:
Engage the same gear at least 5 times (i.e. in the same conditions) to consolidate the programming.
Note:
Gear changes are slow and harsh the first few times the vehicle is driven, until the automatic transmission computer
has carried out its automatic programming.
During upshifts and downshifts, the system analyses variations in oil pressure, components (play in the brakes and
clutches, changes to spring stiffness due to ageing) and input torque, then corrects them in order to maintain the
quality of gear changes.
The system analyses the turbine speed during the 3 phases of drag reduction (selection of Neutral when stationary,
regulation during drag reduction and deselection of Neutral) and corrects this speed by adjusting the converter
lock-up solenoid valve pressure.
AUTOMATIC TRANSMISSION
Fault finding - Fault summary table
23A
23A - 26V3 MR-372-J84-23A000$360.mif
AJ0 BVA
Vdiag No.: 04, 05AUTOMATIC TRANSMISSION
Fault finding - Fault summary table
*signal: signal
*EVS1 = sequence solenoid valve 1
*EVS2 = sequence solenoid valve 2
*LS = line pressure regulation solenoid valveTool fault Associated DTC Diagnostic tool title
DF023710 Transmission oil temperature sensor circuit
DF038715 Turbine speed sensor circuit
DF067705 Lever position switch circuit
DF084C073 Multiplex network
DF0851753 EVS1* shift solenoid circuit
DF0861758 "ESV2"* shift solenoid circuit
DF091748 "LS"* pressure regulation solenoid valve circuit
DF093826 Manual sequential controls circuit
DF095928 Gear lever lock electromagnet circuit
DF097740 Converter lock-up
DF1085300 Effective average torque multiplex signal
DF171720 Vehicle speed sensor circuit
DF1785600 Accelerator pedal position
DF183C140 No UCH multiplex signal
DF186C100 No injection multiplex signal
DF230C415 Invalid vehicle speed multiplex signal
DF236725 Invalid engine speed multiplex signal
DF2384073 Invalid raw engine torque multiplex signal*
DF256730 Erratic gear jumping
DF273753 Clutch 1 solenoid valve circuit
DF274763 Clutch 2 solenoid valve circuit
DF275768 Clutch 3 solenoid valve circuit
DF2891840 Automatic transmission multiplex signal
DF290C121 Multiplexed ABS signal
DF298893 Gear shifts
DF300758 Brake 2 solenoid valve circuit
DF301751 Clutch 1 pressure switch circuit
MR-372-J84-23A000$360.mif
AUTOMATIC TRANSMISSION
Fault finding - Interpretation of faults
23A
23A - 28V3 MR-372-J84-23A000$405.mif
AJ0 BVA
Vdiag No.: 04, 05AUTOMATIC TRANSMISSION
Fault finding - Interpretation of faults
DF023
PRESENT
OR
STOREDGEARBOX OIL TEMPERATURE SENSOR CIRCUIT
1.DEF: Open circuit or short circuit
NOTESConditions for applying fault finding procedures to stored faults:
The fault is declared present after:
–in the event of open circuit or short circuit+:
–+ after ignition feed,
–oil temperature ≤ - 40 ˚C,
–vehicle speed > 6 mph (10 km/h).
–in the event of short circuit-:
–+ after ignition feed,
–oil temperature > 180 ˚C,
–vehicle speed > 6 mph (10 km/h).
–accelerator pedal > 12.5 % and engine speed > 305 rpm.
(detection time in the event of short circuit- is 10 minutes).
Effect on system:
–in the event of open circuit or short circuit+:
Gear change quality is reduced.
lock-up is inhibited.
–in the event of short circuit-:
The transmission operates as if the temperature had increased.
Customer complaint:
–in the event of open circuit or short circuit+:
If the fault occurs while driving, the transmission engages fixed 5th gear.
Restarting is in 3rd gear.
Gear change quality is reduced.
Fault warning light on
–in the event of short circuit-:
Fault warning light on
Use the Wiring Diagrams Technical Note, SCENIC II ph2.
Check that the coolant temperature (see 13B, Diesel injection, EDC16, CP33 M9R 721 Conformity check)
is ≥ - 40 ˚C (the transmission oil temperature sensor is within its operating range).
If the oil temperature ≤ - 40 ˚C, move on to step 1.
If the oil temperature is ≥ - 40 ˚C, deal with the fault; move on to step 2.
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.
AJ0_V04_DF023/AJ0_V05_DF023
MR-372-J84-23A000$405.mif
AUTOMATIC TRANSMISSION
Fault finding - Interpretation of faults
23A
23A - 29V3 MR-372-J84-23A000$405.mif
AJ0 BVA
Vdiag No.: 04, 05
DF023
CONTINUED 1
Step 1:
Start the vehicle, check that engine coolant temperature is ≥ 20 ˚C.
If the fault is stored, deal with the other faults displayed on the diagnostic tool. In the absence of faults, end of
fault finding.
If a fault is still present, deal with it, then move on to step 2.
Step 2:
Look for any damage to the harness and check the condition and connection of the automatic transmission
computer and automatic transmission connectors.
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.
Disconnect the connector from 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,
Is the resistance correct?
If YES, contact the Techline.
If NO, move on to step 3.
Stage 3:
Disconnect connector R22 and check continuity and insulation on the following connections:
●Connection code 5BZ,
●Connection code 5BY.
Between components 119 and R22.
If the connection or 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.
Are the continuity and insulation correct?
If YES, move on to step 4.
If NO, replace the external wiring harness on the automatic 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 faults
23A
23A - 51V3 MR-372-J84-23A000$405.mif
AJ0 BVA
Vdiag No.: 04, 05
*EVS2 = sequence solenoid valve 2DF097
PRESENT
OR
STORED
CONVERTER lock-up
1.DEF: CONVERTER LOCK-UP CONTROL
NOTESOrder of priority in the event of more than one fault:
If there is a combination of the following faults:
–DF097 "Converter lock-up",
–DF086 "Sequence solenoid valve circuit "EVS2*""
–DF306 "Lock-up/brake 1 solenoid valve circuit",
deal first with faults DF086 "Sequence solenoid valve "EVS2*"" and DF306 "Lock-
up/brake 1 solenoid valve circuit".
Conditions for applying fault finding procedures to stored faults:
The fault is declared present after:
If in lock-up:
Lever in Manual position,
and difference in *slippage speed ≥ 40 + Vehicle speed / 2 for a certain time,
and EVS2* solenoid valve control status > 95 %.
In the event of slippage:
Lever in Manual position,
and difference in slippage speed ≥ 40 + slippage speed setpoint for a certain time,
and EVS2* solenoid valve control status > 95 %.
*slippage = engine speed - turbine speed
Effect on system:
Increase in oil temperature.
–In the event of engagement fault, lock-up inhibited.
–In the event of slippage fault, lock-up slippage inhibited.
Customer complaint:
Warning light on.
Use the Wiring Diagrams Technical Note, SCENIC II ph2.
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.
AJ0_V04_DF097/AJ0_V05_DF097
AUTOMATIC TRANSMISSION
23A
23A - 134V3 MR-372-J84-23A000$720.mif
AJ0 BVA
Vdiag No.: 04, 05AUTOMATIC TRANSMISSION
Fault finding - Parameter summary table
Tool parameter Diagnostic tool title
PR004Transmission oil temperature
PR006Engine speed
PR007Turbine speed
PR008Computer voltage supply
PR022Accelerator pedal position
PR067Calculated accelerator pedal position
PR105Vehicle speed
PR106Effective engine torque
PR123Calculated engine torque
PR153Slow torque setpoint
PR154Rapid torque setpoint
MR-372-J84-23A000$720.mif