Continuously Variable Transmission (cvt) 01j on Board Diagnostic (OBD) Audi A4 B6

On Board Diagnostic (OBD), operation

The Multitronic 01J constantly variable automatic transmission is controlled electronically/hydraulically.

The Transmission Control Module (TCM) receives information from components which influence the shifts. Based on this information, the control module activates the applicable proportioning valves in the valve body. The three proportioning valves regulate the fluid pressure generated by the ATF pump.

Proportioning valve 1 regulates the opening and closing of the clutches or brakes respectively.

Proportioning valve 2 controls the transmission ratio between the two disc sets, depending on driving conditions, i.e. it regulates the pressures on the adjusting cylinders of the two disc sets and keeps the chain at a constant tension.

Proportioning valve 3 regulates ATF cooling of the transmission.

A more precise description and operation of the individual valves can be found in

Refer to Self-study Program Course No. 951103, Variable Automatic Transmission, Multitronic 01J

Transmission Control Module (TCM) DTC Recognition

The term "On Board Diagnostic" refers to the electrical/electronic part of the controls.

The control module is equipped with a Diagnostic Trouble Code (DTC) memory so that in the event of the failure of an electrical/electronic component, or in the event of an open circuit, the cause of the malfunction can be determined quickly.

The potential of the On Board Diagnostic (OBD) system can only be fully exploited with the V.A.G. 5051 Vehicle Diagnostic Measurement and Information System or with the V.A.G. 1551 scan tool, operating mode 1 "Rapid Data Transmission."

For functions which the V.A.G. 5051 Vehicle Diagnostic Measurement and Information System or the V.A.G. 1551 scan tool can cover. Refer to List of Selectable Functions , Overview of Selectable Functions.

Malfunctions are recognized by means of electrical signals. If malfunctions occur in the sensors or components being monitored, they are stored in the DTC memory indicating the type and location of the malfunctions.

If a malfunction is present, it is saved as a statistical error. If the malfunction occurs only briefly and is then no longer present, it becomes an intermittent malfunction after the ignition is switched off and on again.

Malfunctions occurring sporadically (intermittently, occasionally) are displayed on the screen as "sporadic."

After 40 engine cold starts (followed by transmission warm-up) the sporadic malfunctions are automatically deleted from the DTC memory

A maximum of 10 trouble codes are stored in the DTC memory. If an eleventh trouble code should be detected with 10 statistical trouble codes, emergency shutoff takes place.

If 10 trouble codes have already been saved in the DTC memory but they are not all statistical, and an eleventh trouble code is added, the oldest existing sporadic trouble code is overwritten.

Transmission Control Module (TCM) safety functions

In the event of a failure of individual or several components or sensors, the control module -J217- activates corresponding substitute functions. This ensures non-destructive operation of the transmission with the consequent effect on the function and quality of the shifts.

Three conditions can be distinguished which are recognized by multitronic.

Scheme 573

1 - The trouble code is stored and a substitute program allows the vehicle to continue to be driven (with some limitations). The driver is not alerted to this condition, since it is not critical to safety nor for the transmission. The transmission range display in the instrument cluster indicates as normal the particular range that has been selected (arrow). The driver may notice a difference in vehicle driveability and contact an authorized dealer.

Scheme 574

2 - The trouble code is stored and a substitute program allows the vehicle to continue to be driven (with some restrictions). The fully illuminated transmission range display in the instrument cluster shows the driver a simple malfunction (arrow). This malfunction is barely noticeable to the driver, but the brightly lighted transmission range display is intended to indicate that he or she should consult an authorized dealer as soon as possible to avoid subsequent damage in the transmission.

Scheme 575

3 - A flashing transmission range indicator in the instrument cluster points to a serious malfunction in the transmission (arrow). The condition is critical to safety or for the transmission.

The flashing transmission range display is requesting the driver to stop his or her vehicle at the nearest possible location and to inform an Audi authorized dealer.

Note. In specific cases following a short wait, driving can be resumed by restarting the engine. In any case, the driver should immediately consult an Audi authorized dealer.

If the Transmission Control Module (TCM) -J217- fails, for example, due to a loss of the voltage feed, it will not be possible to continue driving.

Technical Data

Scheme 576

1 - Transmission Control Module (TCM) for multitronic -J217

1. Component location --> (Scheme 577)
2. Control module is tested by the OBD system
3. Removal and installation

Refer to 38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS

2 - Hydraulic unit

1. Component location. (Scheme 578)
2. Valves are tested by the OBD system

Refer to 38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS

1. Removal and installation

3 - Shift control mechanism cover

1. Removal and installation

Refer to 37 - AUTOMATIC TRANSMISSION - CONTROLS, HOUSING

4 - Tiptronic Switch -F189

1. Component location: Integral with the printed-circuit board which is located in the cover for the shift control mechanism
2. Consists of 3 Hall sensors which are triggered by a solenoid on the transverse slide of the roll cover
3. Can be tested in Measured Value Block. Refer to «Measured Value Block, reading»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2)
4. In the event of Tiptronic switch malfunctions, first check whether the solenoid is properly attached to the roll cover, if necessary replace the transverse slide. The circuit board must not be replaced until the wiring connections have been inspected.

1. Removal and installation

Refer to 37 - AUTOMATIC TRANSMISSION - CONTROLS, HOUSING

5 - Shift lock solenoid -N110

1. Component location. (Scheme 579)
2. Can be tested in the Measured Value Block. Refer to «Measured Value Block, reading»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2) and «Electrical Testing»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2)
3. Removal and installation

Refer to 37 - AUTOMATIC TRANSMISSION - CONTROLS, HOUSING

6 - Data Link Connector (DLC)

1. Component location. (Scheme 580)

7 - Cruise control switch -E45

1. Component location. (Scheme 581)
2. Removal and installation

Refer to

1. «94 LIGHTS, SWITCHES - EXTERIOR»(/audi/a4/b6-2000-2006/remont/cruise-control-systems/#electrical-equipment)
2. 94 LIGHTS, SWITCHES - EXTERIOR for ELECTRICAL EQUIPMENT, CABRIOLET

8 - Park/Neutral Position (PNP) relay -J226

1. Component location. (Scheme 582)

9 - Power supply relay terminal 87

1. Component location. (Scheme 582)

10 - Transmission Range (TR) selector lever display -Y6

1. Component location. see scheme 10
2. Flashing transmission range display indicates a critical defect. Refer to «Transmission Control Module (TCM) safety functions»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2__transmission-control-module-tcm-safety-functions)
3. Fully illuminated transmission range display indicates a simple defect. Refer to «Transmission Control Module (TCM) safety functions»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2__transmission-control-module-tcm-safety-functions)
4. No display points to a wiring fault or a faulty display -Y6

11 - Kickdown switch -F8

1. Component location. (Scheme 584)
2. No mechanical switch. A specific value from the Throttle position sensors -G79-/-G185- is saved in the Engine Control Module (ECM)
3. Signal transmission from the Engine Control Module (ECM) to the Transmission Control Module (TCM) over the CAN bus
4. Can be tested in Measured Value Block. Refer to «Measured Value Block, reading»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2)

1. Accelerator pedal module removal and installation

Refer to 20 - FUEL SUPPLY SYSTEM

12 - Brake light switch -F

1. Component location. (Scheme 583)
2. Can be tested in Measured Value Block. Refer to «Measured Value Block, reading»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2)
3. Removal and installation

Refer to 46 - BRAKES - MECHANICAL COMPONENTS

Scheme 577

Component location: The Transmission Control Module (TCM) -J217- is mounted at the rear of the transmission, directly on the hydraulic unit.

The following components are integrated in the control module.

A - Sender for transmission output RPM -G195- and Sender 2 for transmission output RPM -G196

B - Transmission fluid temperature sensor -G93

C - Multi-function transmission range (TR) switch -F125

D - Sensor for transmission RPM -G182

E - Sender 1 for hydraulic pressure, automatic transmission -G193

F - Sender 2 for hydraulic pressure, automatic transmission -G194

Scheme 578

Component location: The hydraulic unit is bolted to the rear of the transmission. The Transmission Control Module (TCM) -J217- is bolted directly to the hydraulic unit.

A - Wiring connector for Pressure control valve 1 for automatic transmission -N215

A - Wiring connector for Pressure control valve 2 for automatic transmission -N216

C - Wiring connector for solenoid valve 1 -N88

The following valves are integral on the hydraulic unit (not shown here)

1 - Pressure control valve 1 for automatic transmission -N215-; clutch solenoid valve

2 - Pressure control valve 2 for automatic transmission -N216-; transmission ratio solenoid valve

3 - Solenoid valve 1 -N88-; clutch cooling/safety cutoff

4 - Clutch cooling valve

5 - Minimum pressure valve

6 - Pressure control valve

7 - Clutch control valve

8 - Control pressure valve

You will find a more precise description and operation of the individual valves in

Refer to Self-study Program Course No. 951103, Variable Automatic Transmission, Multitronic 01J

Scheme 579

Component location: The shift lock solenoid is located in the shift control mechanism (arrow).

Scheme 580

Component location: The DLC is located under the knee bolster to the left of the steering wheel.

Scheme 581

Component location: The cruise control switch is located on the steering column switch.

Transmission Range (TR) selector lever display -Y6

Component location: Integrated in the instrument cluster

Note. The transmission range selector lever display can only be replaced together with the instrument cluster.

Scheme 582

Component location: On the relay carrier in the E-Box plenum.

3 - Relay for power supply terminal 87

Power supply via terminal 87 is handled through the Motronic ECM power supply relay -J271-.

4 - Park/Neutral Position (PNP) relay -J226

Scheme 583

Component location: The brake light switch -arrow- is located on the pedal cluster.

Note. To ensure an adequately tight fit, the switch must only be installed once.

Scheme 584

Component location

1. No mechanical switch. A specific value from the Throttle position sensors -G79-/-G185- is stored in the Engine Control Module (ECM)

Safety Precautions

If the use of test and measuring equipment is required during test drives, the following precautions must be observed

In order to prevent injuries to persons and/or destruction of electrical and electronic components, the following precautions must be observed

1. Attach measurement and test equipment terminals only with the ignition switched OFF.
2. With some tests it may happen that the control module detects and stores a trouble code. For this reason, the DTC memory must be read and if necessary deleted after completing all tests and repairs.
3. Disconnecting and attaching battery terminals must only be carried out with the ignition switched OFF, otherwise the Transmission Control Module (TCM) can be damaged.

Performance testing, brake testing and towing

Note. It is not possible to tow the vehicle in order to start the engine, for example when the battery is too weak or the starter is not working.

VAS 5051 Vehicle Diagnosis, Measurement and Information System, connecting and selecting functions

Test requirements

1. Parking brake applied.
2. Vehicle voltage supply O.K.
3. Voltage supply and fuses for particular system O.K.

Refer to Electrical Wiring Diagrams, Troubleshooting and Component Locations binder

1. Ground connections for transmission O.K.

Refer to Electrical Wiring Diagrams, Troubleshooting and Component Locations binder

1. Check ground connections for corrosion and damaged connection, repair as needed.

Refer to Electrical Wiring Diagrams, Troubleshooting and Component Locations binder

1. Check battery ground (GND) strap and ground (GND) strap between battery and transmission.

Test procedure

1. Switch ignition OFF.

1. Connect VAS 5051 Vehicle Diagnosis, Measurement and Information System with diagnostic lead VAS 5051/1.

Note. The Data Link Connector (DLC) is located at the left-side knee bolster.

Note. If an error message appears in the display

Refer to Users Manual for VAS 5051 Vehicle Diagnosis, Measurement and Information System VAS 5051

Scheme 585

Display on VAS 5051

1. Touch "Vehicle OBD" button.

Scheme 586

Display on VAS 5051

Note. By touching "00 Read DTC Memory Complete System" in the selection -1- the automatic test sequence is performed, i.e. a scan is performed of the DTC memory for all systems in the vehicle capable of OBD.

Depending on the desired function

1. Switch ignition ON.

or

1. Start engine.
2. In selection -1- touch vehicle system "02 Transmission Electronics".
3. Wait until next display appears on screen.

Scheme 587

Display on VAS 5051

1 - Control module identification number of the Transmission Control Module (TCM).

List of Selectable Functions

Diagnostic Trouble Code (DTC) memory, reading

1. Connect VAS 5051 Vehicle Diagnosis, Measurement and Information System. Refer to «VAS 5051 Vehicle Diagnosis, Measurement and Information System, connecting and selecting functions»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2__vas-5051-vehicle-diagnosis-measurement-and) . In selection touch vehicle system "02 Transmission Electronics". Ignition must be switched on.

Scheme 588

Display on VAS 5051

1. In selection -1- touch diagnostic function "02 Read DTC memory".

Scheme 589

Display on VAS 5051

1 - Contents of the DTC memory

0 DTC detected

or

X DTCs detected

2 - DTC

DTC

Location of DTC

Type of DTC

A - If DTCs were recognized

1. Print out contents of screen or OBD protocol.
2. End function "02 Read DTC memory" by touching <-- button.

Display on VAS 5051

1. Repair malfunction(s) using DTC Chart. Refer to «Diagnostic Trouble Code (DTC) table»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2) .
2. In selection touch diagnostic function "02 Read DTC memory" again and delete DTC memory. Refer to «Diagnostic Trouble Code (DTC) memory, erasing»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2) .
3. Touch "06 End output".

B - If no DTC was detected

1. Touch "06 End output".

Diagnostic Trouble Code (DTC) table

Note. In the following list all the possible DTCs are shown in ascending order. These DTCs can be recognized by the Transmission Control Module (TCM) -J217-. Then they are displayed on the VAS 5051 Vehicle Diagnosis, Measurement and Information System VAS 5051 or on the V.A.G 1551 scan tool during reading of the DTC memory content. If DTCs occur only occasionally or if the DTC memory was not deleted after the malfunction was corrected, these DTCs will be displayed for a predetermined time as "intermittently occurring DTCs". Refer to Transmission Control Module (TCM) DTC Recognition . If faulty components are displayed when the DTC memory is read, make an additional check of wiring connections to the components for short or open circuits.

Refer to Electrical Wiring Diagrams, Troubleshooting and Component Locations binder

Part 1, up to Diagnostic Trouble Code 18149/P1741

Note on DTC 17087/P0703

1. Conditions for DTC recognition: The signals from the brake light switch and the brake test switch are transmitted over the CAN bus circuit to the Transmission Control Module (TCM) and evaluated there. After 10 consecutive occurrences of an implausibility between the brake light switch and the brake test switch (one switch actuated, the other not) this DTC is saved in the Transmission Control Module (TCM).

1) The solenoid transmits the current position of the selector shaft to the Hall sensors on the multifunction TR switch -F125-. If the shift control mechanism is correctly adjusted, this position matches the selector lever position.

2) The multifunction TR switch -F125- is integrated in the Transmission Control Module (TCM) -J217- and can only be replaced as a unit with the Transmission Control Module (TCM).

3) The transmission fluid temperature sensor -G93- is integrated in the Transmission Control Module (TCM) -J217- and can only be replaced as a unit along with the Transmission Control Module (TCM).

4) The Transmission fluid temperature sensor -G93- is integrated in the Transmission Control Module (TCM) -J217- and can only be replaced as a unit along with the Transmission Control Module (TCM).

Note on DTC 17096/P0712

1. Condition for DTC recognition: The temperature reading measured fell below -60°C.

4) The transmission fluid temperature sensor -G93- is integrated in the Transmission Control Module (TCM) -J217- and can only be replaced as a unit with the Transmission Control Module (TCM).

5) The Measured Value Block should be read out when the engine and transmission have cooled (approx. room temperature). If the temperature reading is then higher than or equal to 160°C, the transmission fluid temperature sensor -G93- is clearly faulty.

Note on DTC 17097/P0713

1. Condition for DTC recognition: The temperature reading measured has exceeded 160°C.

6) The Sensor for transmission RPM -G182- is integrated in the Transmission Control Module (TCM) -J217 and can only be replaced as a unit along with the Transmission Control Module (TCM).

Note on DTC 17100/P0716

1. Condition for DTC recognition: The Transmission Control Module recognizes short-term drive RPM which is higher than 7000 RPM.

6) The Sensor for transmission RPM -G182- is integrated in the Transmission Control Module (TCM) -J217- and can only be replaced as a unit along with the Transmission Control Module (TCM).

Note on DTC 17101/P0717

1. Condition for DTC recognition: The Transmission Control Module (TCM) recognizes short-term input RPM which is less than or equal to 1 RPM and simultaneously an output RPM which is higher than 100 RPM.

7) The Sender for transmission RPM -G195- is integrated in the Transmission Control Module (TCM) -J217- and can only be replaced as a unit along with the Transmission Control Module (TCM).

Note on DTC 17110/P0726

1. An implausible RPM signal is being received by the Transmission Control Module (TCM) over the RPM lead. The cause could be, for example, engine RPM too high or false RPM readings caused by interference from the ignition system. The substitute engine RPM signal is then transmitted by the Engine Control Module (ECM) over the CAN bus circuit to the Transmission Control Module.

Note on DTC 17111/P0727

1. In the event of an open circuit in the RPM lead, the substitute engine RPM signal is transmitted by the Engine Control Module (ECM) over the CAN bus circuit to the Transmission Control Module (TCM).

8) Solenoid valve 1 -N88- is integral in the hydraulic unit and can only be replaced as a unit along with the hydraulic unit.

9) The wires are integral in the Transmission Control Unit -J217- and can only be replaced as a unit along with the new Transmission Control Module (TCM).

10) The data bus is also described as a CAN bus.

11) Software status of Engine Control Module (ECM), ABS and Transmission Control Module (TCM) or instrument cluster do not match, or an incorrect Transmission Control Module could also have been installed.

Notes on DTC 18031/P1623

1. The exchange of data and information between the Engine Control Module (ECM), ABS control module, Transmission Control Module (TCM) and instrument cluster is carried out over the CAN bus. All information signals are transmitted over 2 leads.
2. The Transmission Control Module (TCM) can send signals and data, but it cannot receive anything.

13) No mechanical switch. A specific value from the Throttle position sensors -G79-/-G185- is saved in the Engine Control Module (ECM). Signal transmission from Engine Control Module (ECM) to Transmission Control Module takes place over CAN bus.

Note on DTC 18112/P1704

1. With the brake pedal depressed and simultaneous full depression of the accelerator pedal as far as Kickdown (Wide Open Throttle) this DTC can be displayed erroneously.

Note on DTC 18132/P1724

1. Open circuit cannot be determined by the control module.

Note on DTC 18137/P1729

1. Open circuit cannot be determined by the control module.

14) The Tiptronic switch -F189- consists of switches for recognition, upshift and downshift. It is integrated in the shift mechanism printed circuit board, i.e. if the Tiptronic switch is faulty, the printed circuit board has to be replaced.

15) The Tiptronic switch -F189- receives its Tiptronic gate recognition or upshift/downshift information through the solenoid on the transverse slide of the roll cover. If the solenoid has become detached, the cover must be replaced.

Note on DTC 18141/P1733

1. In the case of this DTC "Downshift switch" is always displayed in Measured Value Block 003.

14) The Tiptronic switch -F189- consists of switches for recognition, upshift and downshift. It is integrated in the shift mechanism printed circuit board, i.e. if the Tiptronic switch is faulty, the printed circuit board has to be replaced.

15) The Tiptronic switch -F189- receives its Tiptronic gate recognition or upshift/downshift information through the solenoid on the transverse slide of the roll cover. If the solenoid has become detached, the cover must be replaced.

Note on DTC 18147/P1739

1. In the case of this DTC "Upshift switch" is always displayed in Measured Value Block 003.

Notes on DTC 18148/P1740

1. The DTC is displayed when clutch temperature is too high.
2. Engine torque is automatically cut back until the temperature has fallen into the permissible operating range again.

Note on DTC 18149/P1741

1. If this DTC occurs intermittently (display SP), the DTC memory must be deleted. Afterward, the vehicle must be taken for a test drive and the DTC memory read again. If the DTC recurs, the hydraulic unit must be replaced.

Part 2, up to Diagnostic Trouble Code 18270/P1862

16) This DTC is displayed if an incorrect transmission has been installed, i.e. if a transmission for a 1.8 liter engine was mistakenly installed in a vehicle with a 3.0 liter engine.

14) The Tiptronic switch -F189- consists of switches for recognition, upshift and downshift. It is integrated in the shift mechanism printed circuit board, i.e. if the Tiptronic switch -F189- is faulty, the printed-circuit board has to be replaced.

15) The Tiptronic switch -F189- receives its Tiptronic gate recognition or upshift/downshift information through the solenoid on the transverse slide for the roll cover. If the solenoid has become detached, the cover must be replaced.

17) If the transmission is shifted into the Tiptronic gate with the selector lever in D this shift procedure is recognized by the Tiptronic recognition switch -F189- and transmitted to the Transmission Control Module (TCM).

Note on DTC 18152/P1744

1. DTC is displayed if Tiptronic recognition was detected, although the selector lever is not in the Tiptronic gate.

Note on DTC 18158/P1750

1. Condition for DTC recognition: Battery voltage was detected as less than or at 10 V.

Notes on DTC 18159/P1751

1. Condition for DTC recognition: Battery voltage above 16 volts.
2. This DTC was also displayed, for example, when jump starting with a 24 volt battery.

14) The Tiptronic switch -F189- consists of switches for recognition, upshift and downshift. It is integrated in the shift mechanism printed circuit board, i.e. if the Tiptronic switch -F189- is faulty, the printed circuit board has to be replaced.

14) The Tiptronic switch -F189- consists of switches for recognition, upshift and downshift. It is integrated in the shift mechanism printed circuit board, i.e. if the Tiptronic switch -F189- is faulty, the printed circuit board has to be replaced.

14) The Tiptronic switch -F189- consists of switches for recognition, upshift and downshift. It is integrated in the shift mechanism printed circuit board, i.e. if the Tiptronic switch -F189- is faulty, the printed circuit board has to be replaced.

14) The Tiptronic switch -F189- consists of switches for recognition, upshift and downshift. It is integrated in the shift mechanism printed circuit board, i.e. if the Tiptronic switch -F189- is faulty, the printed circuit board has to be replaced.

18) Shift locksolenoid -N110- is also described as selector lever lock solenoid.

Notes on DTC 18172/P1764

1. The DTC is displayed when clutch temperature is too high.
2. Engine torque is automatically cut back until the temperature has fallen into the permissible operating range again.

Note on DTC 18181/P1773

1. If DTC 18201/P1793 is displayed in addition, the sensor wheel may be faulty and the transmission must be replaced.

19) The Transmission Range selector lever display -Y6- is integrated in the instrument cluster and can only be replaced as a unit with the instrument cluster.

19) The Transmission Range selector lever display -Y6- is integrated in the instrument cluster and can only be replaced as a unit with the instrument cluster.

Note on DTC 18199/P1791

1. No display in instrument cluster.

19) The Transmission Range selector lever display -Y6- is integrated in the instrument cluster and can only be replaced as a unit with the instrument cluster.

Note on DTC 18201/P1793

1. If DTC 18181/P1773 is displayed in addition, the sensor wheel may be faulty and the transmission must be replaced.

16) This DTC is displayed if an incorrect transmission has been installed, i.e. if a transmission for a 1.8 liter engine was mistakenly installed in a vehicle with a 3.0 liter engine.

20) Code 0000 is displayed in the Transmission Control Module (TCM) identification number.

10) The data bus is also described as a CAN bus.

Notes on DTC 18258/P1850

1. Condition for DTC recognition: The Transmission Control Module (TCM) is not receiving a message from the Engine Control Module (ECM). However, communication with the ABS control module and the instrument cluster is working.
2. The exchange of data and information between the Engine Control Module (ECM), ABS control module, Transmission Control Module (TCM) and instrument cluster is carried out over what is called a CAN bus. All information signals are transmitted over 2 leads.

Notes on DTC 18259/P1851

1. Condition for DTC recognition: The Transmission Control Module (TCM) is not receiving a signal from the ABS control module. However, communication with the Engine Control Module (ECM) and the instrument cluster is working.
2. The exchange of data and information between the Engine Control Module (ECM), ABS control module, Transmission Control Module (TCM) and instrument cluster is carried out over what is called a CAN bus. All information signals are transmitted over 2 leads.

10) The data bus is also described as a CAN bus.

Note on DTC 18262/P1854

1. The exchange of data and information between the Engine Control Module (ECM), ABS control module, Transmission Control Module (TCM) and instrument cluster is carried out over what is called a CAN bus. All information signals are transmitted over 2 leads.

Note on DTC 18263/P1855

1. The exchange of data and information between the Engine Control Module (ECM), ABS control module, Transmission Control Module (TCM) and instrument cluster is carried out over what is called a CAN bus. All information signals are transmitted over 2 leads.

Notes on DTC 18265/P1857

1. The signal for actual engine torque is transmitted from the Engine Control Module (ECM) over the CAN bus lead to the Transmission Control Module (TCM).
2. Conditions for DTC recognition: The malfunction in the component in question is diagnosed by the Engine Control Module (ECM). This diagnosis is transmitted over the CAN bus circuit to the Transmission Control Module (TCM).

10) The data bus is also described as a CAN bus.

Notes on DTC 18270/P1862

1. Condition for DTC recognition: The Transmission Control Module is not receiving a message from the Engine Control Module (ECM). However, communication with the ABS control module is working.
2. The exchange of data and information between the Engine Control Module (ECM), ABS control module, Transmission Control Module (TCM) and instrument cluster is carried out over what is called a CAN bus. All information signals are transmitted over 2 wires.

Output Diagnostic Test Mode (DTM)

Note. Output DTM can only be performed if the selector lever is in "P" or "N," the engine is not running and the vehicle is stationary. Output DTM is terminated if the engine is started, the vehicle starts to move or if a switch is not made within about 60 seconds to the next actuator. It is also terminated if the selector lever is moved to a position other than "P" or "N."

Test sequence

1. Connect VAS 5051 Vehicle Diagnosis, Measurement and Information System. Refer to «VAS 5051 Vehicle Diagnosis, Measurement and Information System, connecting and selecting functions»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2__vas-5051-vehicle-diagnosis-measurement-and) and select vehicle system "02 Transmission Electronics". Ignition must be switched on.

Display on VAS 5051

1. Touch -1- diagnostic function "03 Diagnostic Test Mode".
2. Touch delta button.

Scheme 590

Display on VAS 5051

A - First actuator being tested

1 - Back-up light signal

1. The Park/Neutral Position (PNP) Relay -J226- turns the back-up lights ON and OFF at intervals for about 1 minute unless a switch has been made to the next actuator by pressing the delta button.

If the back-up lights do not illuminate

1. Check Park/Neutral Position (PNP) Relay -J226- and wiring using wiring diagram.

Note. Any electrical malfunctions are saved in the DTC memory. Refer to DTC chart starts on Diagnostic Trouble Code (DTC) table .

1. Touch delta button.

Scheme 591

Display on VAS 5051

A - Second actuator being tested

2 - Shift lock solenoid -N110

1. The shift lock solenoid -N110- is triggered at intervals for about 1 minute (clicks) unless actuator diagnosis is terminated by touching the delta button.

Note. In addition, the brake symbol on the shift mechanism cover must illuminate at intervals.

If the solenoid is not triggered

1. Perform electrical test. Refer to «Electrical Testing»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2) .

Note. Any electrical malfunctions are saved in the DTC memory. Refer to DTC chart starts on Diagnostic Trouble Code (DTC) table .

1. Touch the delta button.

Scheme 592

Display on VAS 5051

A - Actuator test is concluded

1. End function "03 Diagnostic Test Mode" by touching <-- button.

Diagnostic Trouble Code (DTC) memory, erasing

Requirements

1. DTC memory read. Refer to «Diagnostic Trouble Code (DTC) memory, reading»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2) .
2. All DTCs corrected.

After DTC scan has been performed

Display on VAS 5051

1. Touch -1- diagnostic function "05 Erase DTC memory".

Scheme 593

Display on VAS 5051

1 - No display (before erasing)

or

DTC memory erased

Note. If the message: "DTC memory has not been read yet" appears in display field -1-, the test procedure was not followed exactly. The DTC memory can only be erased if the DTC memory was read previously.

2 - you sure you want to do this? will be deleted!

1. Touch "OK" button in display -2-.
2. End function "05 Erase DTC memory" by touching <-- button.
3. After repair read DTC memory again.

Note. This erases DTCs which were stored during repair of the malfunction, for example by removing harness connectors.

1. After reading and deleting DTC memory, test drive vehicle and read DTC memory again.

DTC memory must display

"No DTC recognized"

Transmission Control Module (TCM), coding

The Transmission Control Module (TCM) can be coded.

Note. Coding can only be performed with the ignition ON and with the selector lever in position "P" or "N." The accelerator pedal must be in the idle position. The vehicle must be stationary and the engine must not be started.

Test procedure

1. Connect VAS 5051 Vehicle Diagnosis, Measurement and Information System. Refer to «VAS 5051 Vehicle Diagnosis, Measurement and Information System, connecting and selecting functions»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2__vas-5051-vehicle-diagnosis-measurement-and) and select vehicle system "02 Transmission Electronics". Ignition must be switched on.

Display on VAS 5051

1. Touch -1- diagnostic function "07 Coding control module".

Scheme 594

Display on VAS 5051

1 - Enter code word

1. On keypad -2- enter control module code as given in code chart.
2. Confirm entry by pressing Q button.

Coding chart

Note. After coding, the Transmission Control Module DTC memory is automatically deleted.

Display on VAS 5051

1 - Coding is being carried out

1. Wait until next display appears on screen.

Scheme 595

Display on VAS 5051

1 - Coding in the vehicle system completed

2 - Control module identification number with new coding (previous coding in parentheses)

1. Terminate function "07 Coding Control Module" by pressing <-- button.
2. Perform adaptation. Refer to «Adaptation»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2) .

Measured Value Block, reading

Test procedure

1. Connect VAS 5051 Vehicle Diagnosis, Measurement and Information System. Refer to «VAS 5051 Vehicle Diagnosis, Measurement and Information System, connecting and selecting functions»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2__vas-5051-vehicle-diagnosis-measurement-and) and select vehicle system "02 Transmission Electronics". Ignition must be switched on.

or, depending on the desired operation

1. Start engine.

Display on VAS 5051

1. Touch -1- diagnostic function "08 Read Measured Value Block".

Display on VAS 5051

1 - Enter display group Max. input value = 255

1. On key pad -2- enter desired 3-digit display group number. Refer to «List of Selectable Display Groups»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2__list-of-selectable-display-groups) and confirm entry by touching Q button.

Example

1. Enter "001" for "Display group number 001" and confirm by touching Q button.

Scheme 596

Display on VAS 5051 for display group 001 to 255

1 - Display group X

2 - Display field 1

Display field 2

Display field 3

Display field 4

Note. If a display field is not being used, there will be no display. To switch to another display field, proceed as follows

1. End function "08 Read Measured Value Block" by touching <-- button.

List of Selectable Display Groups

Note. The legend for the values in the individual display fields can be found under. Refer to "Test Chart for Measured Value Blocks" starting on Measured Value Block table .

Measured Value Block table

1) While driving: a second technician is needed to read the specified values.

2) While driving: a second technician is needed to read the specified values.

4) You must activate the upshift switch (+) by tapping the selector lever forward. On vehicles with multi-function steering wheel the upshift switch has to be activated by additionally tapping the upper left or right button (+) on the steering wheel.

5) You must activate the downshift switch (-) by tapping the selector lever to the rear. On vehicles with multi-function steering wheel the downshift switch has to be activated by additionally tapping the lower left or right button (-) on the steering wheel.

2) While driving: a second technician is needed to read the specified values.

2) While driving: a second technician is needed to read the specified values.

Notes on display group number 004

1. If "0 RPM" is shown in display field 3 or 4, the corresponding sender is faulty and the Transmission Control Module (TCM) must be replaced.
2. If "0 RPM" is shown in display field 3 and 4, there is a mechanical defect in the transmission, and the transmission must be replaced.

2) While driving: a second technician is needed to read the specified values.

2) While driving a second technician is needed to read the specified values.

Note on display group number 007, display field 4

1. If "AS" is always displayed, the clutch is slipping. The ATF must be changed. If "AS" is still displayed the transmission must be replaced.

2) While driving a second technician is needed to read the specified values.

2) While driving a second technician is needed to read the specified values.

6) In order to generate the Kickdown signal the accelerator pedal must be depressed to the stop.

7) "ADP" is the abbreviation for adaptation. Adaptation means adapting to an internal specified value.

7) "ADP" is the abbreviation for adaptation. Adaptation means adapting to an internal specified value.

2) While driving a second technician is needed to read the specified values.

2) While driving a second technician is needed to read the specified values.

2) While driving a second technician is needed to read the specified values.

Notes on display group number 125

1. If "1" is displayed, communication from the corresponding control module to the Transmission Control Module (TCM) is O.K.
2. If "0" is displayed and no trouble code has been set in the DTC memory, the corresponding control module does not have CAN capability (or is faulty).

Adaptation

Adaptation must be performed after the following operations

1. After replacing the Transmission Control Module (TCM) -J217
2. After coding the Transmission Control Module -J217
3. After reprogramming (flash) the Transmission Control Module -J217

Requirement

1. No trouble codes in the DTC memory; read DTC memory. Refer to «Diagnostic Trouble Code (DTC) memory, reading»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2) .

Adaptation for driving forward

1. Read Measured Value Block display group 010, engine at idle. Refer to «Measured Value Block, reading»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2) .

Scheme 597

Display on VAS 5051

1. Check whether transmission fluid temperature in display field 3 is higher than 60°C. A short test drive may be necessary to reach this temperature.
2. Drive forward briefly and then brake to a stop again.
3. Check display in display field 2.

1. Display must from change "ADP. is running" to "ADP. O.K."

If the display does not come up as described

1. Repeat start from stop and braking procedure until "ADP. O.K." is displayed.

If the specified value "ADP. O.K." is not obtained

1. Read DTC memory. Refer to «Diagnostic Trouble Code (DTC) memory, reading»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2) and correct malfunction. Adaptation must be performed again afterward.
2. Perform adaptation for driving in reverse.

Adaptation for driving in reverse

1. Read Measured Value Block display group 011, engine at idle. Refer to «Measured Value Block, reading»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2) .

Display on VAS 5051

1. Drive backward (in reverse) briefly and then brake to a stop again.
2. Check display in display field 2.

1. Display must from change "ADP. is running" to "ADP. O.K."

If the display does not come up as described

1. Repeat start from stop and braking procedure until "ADP. O.K." is displayed.

If the specified value "ADP. O.K." is not obtained

1. Read DTC memory. Refer to «Diagnostic Trouble Code (DTC) memory, reading»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2) and correct malfunction. Adaptation must be performed again afterward.

Electrical Testing

Special tools and equipment

Scheme 598

1. Multimeter V.A.G. 1526 A

Scheme 599

1. Test box V.A.G. 1598/21

Note. For testing, use Multimeter V.A.G. 1526 A or VAS 5051 Vehicle Diagnosis, Measurement and Information System. The charts contain the specific measurement methods which have to be set up before the corresponding measurements. The specified values given are valid for an ambient temperature of 0°C to 40°C. If the values measured deviate from the specified values, determine the malfunction using the wiring diagram. If the values measured show only a minor deviation from the specified values, clean cavities and plugs on the test equipment and test leads, repeat test. Before replacing the components in question, check their wires and connectors. In particular with specified values below 10 ohms repeat the resistance measurement on the component. The terminal numbers of the connector and the cavity numbers on the V.A.G. 1598/21 test box match. Refer to Multiple harness connector (25-pin connector) for Transmission control module -J217- (cavities on V.A.G 1598/21) .

Test requirements

1. Vehicle power supply O.K.
2. Power supply and fuses for particular system OK

Refer to Electrical Wiring Diagrams, Troubleshooting and Component Locations

1. Ground connections for transmission O.K.

Refer to Electrical Wiring Diagrams, Troubleshooting and Component Locations

1. Check ground connections for corrosion and faulty connection, repair as needed.

Refer to Electrical Wiring Diagrams, Troubleshooting and Component Locations

1. Check battery ground strap and ground strap between battery and transmission.

Test procedure

1. Switch ignition OFF.

Scheme 600

1. Undo quick release fasteners -2- and -3- and remove sound deadening at rear. Sound deadening at front remains installed.
2. Loosen cover for vehicle floor and heat shield above exhaust system in rear area of transmission. Push heat shield a little to one side.

Scheme 601

1. Where used, remove left inner -2- and right inner -1- vehicle floor covers.

Scheme 602

1. Unlock connector -A- in direction of (arrow) and disconnect it from transmission.
2. Uncover wiring harness.
3. Connect test box V.A.G 1598/21 to wiring harness to control module.
4. Perform test as described in specific test chart.

Multiple harness connector (25-pin connector) for Transmission control module -J217- (cavities on V.A.G 1598/21)

Test table

8) Power supply through terminal 87 is managed in different ways: On vehicles with the 2.4 liter engine through the ignition time delay relay for ignition cut off -J64-; On all other gasoline engines through the Motronic ECM power supply relay -J271-; On vehicles with diesel engines through the Diesel Direct Fuel Injection (DFI) system relay -J322-.

7) Corresponding terminal pinout on the Engine Control Module (ECM)

Refer to Electrical Wiring Diagrams, Troubleshooting and Component Locations

Shift Lock Solenoid -N110-, checking

Note. This test must be performed if the specified values in the voltage measurement are not reached.

Additional special tools and equipment

Scheme 603

1. Connector test kit V.A.G 1594 A

Test sequence

1. Remove cover for shift control mechanism

Refer to 37 - AUTOMATIC TRANSMISSION - CONTROLS, HOUSING

Scheme 604

1. Disconnect harness connector at Shift lock solenoid -N110 -A-.
2. Attach multimeter for resistance measurement between contacts -B-.

1. Specified value: 22.3 ± 1 ohms

If the specified value is not reached

1. Replace the shift lock solenoid.

Refer to 37 - AUTOMATIC TRANSMISSION - CONTROLS, HOUSING

Data Exchange between Transmission Control Module (TCM) and CAN-Capable Control Modules, checking

Note. The exchange of data between the individual control modules is carried out by means of a bus system. "CAN Bus" describes a system to carry and distribute data. The wiring connections between the control modules, over which the data are transmitted, are described as data lines. Data are transmitted serially, that means in sequence, over these data lines to the attached control modules (e.g. engine RPM, accelerator pedal position).

Checking bus system

In the DTC table you were instructed to inspect the exchange of data between the Transmission Control Module (TCM) and CAN-capable control modules.

1. Connect VAS 5051 Vehicle Diagnosis, Measurement and Information System. Refer to «VAS 5051 Vehicle Diagnosis, Measurement and Information System, connecting and selecting functions»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2__vas-5051-vehicle-diagnosis-measurement-and) and select vehicle system "02 Transmission Electronics". Ignition must be switched on.

Display on VAS 5051

1. Touch -1- diagnostic function "08 Read Measured Value Block".

Display on VAS 5051

1 - Enter display group Max. input value = 255

Note. Measured Value Block 125 shows the participants on the data BUS drive.

1. On keypad enter -2- "125" for "Display group number 125" and confirm by touching Q button.

Display on VAS 5051

1. Check displays in display fields -1- to -4-.

The display shows the control modules which are CAN- capable with the Engine Control Module (ECM)

1. Display 1: CAN-capable control module is a participant on data bus
2. Display 0 or no display: CAN-capable control module is not a participant on data bus or not CAN-capable

1. End function "08 Read Measured Value Block" by touching <-- button.
2. Touch "06 End output".

Display on VAS 5051

1. In selection -1- touch diagnostic function "00 Read DTC memory complete system".

1. DTC memory of all systems in the vehicle capable of On Board Diagnostic (OBD) is read.

If a control module responds and identifies itself, the number of stored DTCs or "No DTC" is displayed on the screen.

Any stored DTCs in a system are shown in sequence. Then the VAS 5051 sends the next address word.

If a DTC referring to "Data bus drive..." or "...CAN bus" is displayed

1. Check whether correct Engine Control Module (ECM) and other CAN-capable control modules have been installed (Part No. and Code).

If the correct control modules have been installed

1. Check whether multiple connectors for control module are fully seated.

If the multiple connectors are fully seated

1. Check CAN bus system.

Checking a "Dual Wire Bus System"

Communication takes place between two or more control modules over a "Dual Wire Bus System".

1. Analyze DTCs stored in control modules.

Note. The analysis helps to pinpoint the wiring malfunction.

Example 1

Based on the DTCs entered in the DTC memories, it can be seen that control module 1 is not connected to control modules 2 and 3.

1. Switch ignition OFF.
2. Disconnect control modules connected by bus circuit and check whether a bus wiring connection has an open circuit.

Refer to Electrical Wiring Diagrams, Troubleshooting and Component Locations

1. If no malfunction is found in bus wiring, replace control module 1.

Example 2

Based on the DTCs entered in the DTC memories, it can be seen that control module 2 is not connected to control modules 1 and 3.

1. Switch ignition OFF.
2. Disconnect control modules connected by the bus circuit and check whether a bus wiring connection has an open circuit.

Refer to Electrical Wiring Diagrams, Troubleshooting and Component Locations

1. If no malfunction is found in bus wiring, replace control module 2.

Example 3

Based on the DTCs entered in the DTC memory, it can be seen that no transmission or reception activity is possible in any of the control modules.

1. Switch ignition OFF.

Scheme 605

1. Disconnect control modules connected by bus circuit wiring and inspect bus wiring for a short circuit to B+ and to ground.

Refer to Electrical Wiring Diagrams, Troubleshooting and Component Locations

If you are unable to determine any cause in the bus wiring for the DTC "Data bus drive faulty", check to see whether one of the control modules is responsible for this DTC.

Test requirement

1. VAS 5051 Vehicle Diagnosis, Measurement and Information System connected and Vehicle OBD selected. Refer to «VAS 5051 Vehicle Diagnosis, Measurement and Information System, connecting and selecting functions»(/audi/a4/b6-2000-2006/remont/automatic-trans/#continuously-variable-transmission-cvt-01j-on-board-diagnostic-obd-2__vas-5051-vehicle-diagnosis-measurement-and) .

All the control modules which use the CAN bus for communication are disconnected. The ignition is switched OFF.

1. Connect one control module.

Display on VAS 5051

1. Switch ignition ON.
2. Touch appropriate vehicle system in Display -1-.
3. Read DTC memory of control module just connected and delete it.
4. Touch delta button.

1. In display touch -1- diagnostic function "06 End output".
2. Switch ignition OFF and ON again.
3. Leave ignition switched ON for 10 seconds. Then, using scan tool, read DTC memory of control module just connected.
4. If DTC "Data bus drive faulty" is read, control module just connected must be replaced.

1. If DTC "Data bus drive not faulty" is read, connect next control module and repeat procedure.

See also:
• 38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS
• 94 LIGHTS, SWITCHES - EXTERIOR
• 20 - FUEL SUPPLY SYSTEM
• 46 - BRAKES - MECHANICAL COMPONENTS
• List of Selectable Functions
• Transmission Control Module (TCM) safety functions
• Safety Precautions
• VAS 5051 Vehicle Diagnosis, Measurement and Information System, connecting and selecting functions
• Transmission Control Module (TCM) DTC Recognition
• Data Exchange between Transmission Control Module (TCM) and CAN-Capable Control Modules, checking
• List of Selectable Display Groups
• Measured Value Block table
• Multiple harness connector (25-pin connector) for Transmission control module -J217- (cavities on V.A.G 1598/21)
• Shift Lock Solenoid -N110-, checking