Definitions

These explanations refer only to Automatic Transmission 01V All Wheel Drive On Board Diagnostic (OBD). These definitions are not necessarily universally valid.

ABS with EDL:
Anti-lock brake system with electronic differential lock.

Display group:
See Read Measuring Value Block (scan tool function 08)

ASR:
Traction control system

ATF (Automatic Transmission Fluid):
Transmission oil for automatic transmission

CAN-bus:
A bus is a defined path or "highway" for the transmission and distribution of data.

A Controller Area Network (CAN) is a bus system working with two wires, known as "bus" wires. The bus wires transmit data in serial form (one after the other) to the control modules connected into the system.

CAN-bus low (high):
The voltage used to transport the data is low (high).

DSP:
Dynamic shift program

On Board Diagnostic (OBD):
The capability of the control module:
- To recognize malfunctions,
- To react to malfunctions,
- To store Diagnostic Trouble Codes (DTCs),
- To register DTCs and make them available in the Read Measuring Value Block.

Performing On Board Diagnostic (OBD):
Connecting the VAG 1551 Scan Tool (ST) to be able to check the Diagnostic Trouble Code (DTC) memory. See scan tool operating instructions.

Performing electrical testing:
Electronic components can be checked by performing certain measurements and comparing them to listed specifications.

Transmission Vehicle Speed Sensor (VSS) -G38-:
The sensor records the transmission output speed and transmits it to the Transmission Control Module (TCM) -J217-.

Transmission fluid temperature sensor -G93-:
Monitors the temperature of the ATF to prevent the transmission from overheating. It is located on the valve body within the wiring harness for the solenoid valves.

Sensor for transmission RPM -G182-:
The sensor records the speed of the planetary carrier of the Ravigneaux planetary gear set and transmits it to the Transmission Control Module (TCM) -J217-.

No communication:
There is no connection for exchanging information between the control modules.

Kickdown switch -F8-:
The kickdown switch is integrated into the accelerator pedal cable. When the accelerator pedal is depressed fully onto its stop, the transmission downshifts for acceleration.

Short to Ground (GND):
Current flows incorrectly to Ground (GND) without supplying a consumer.

Short to positive:
Current flows incorrectly to a live component without supplying a consumer.

Shift lock solenoid -N110-:
Located in the selector lever housing close to the selector lever. Prevents movement (involuntary) of the selector lever from positions "P" and "N" as long as the brake pedal is not depressed.

Solenoid valves -N88- to -N90-:
Opens and closes the oil channels to the clutches and brakes when signals are received from the control module.

Solenoid valve -N91-:
Continuously regulates (as a modulation valve) the amount of ATF required.

Solenoid valves -N92- and -N93-:
These modulation valves continuously regulate the hydraulic pressure during gear changes to enable the clutches and brakes to open and close smoothly.

Read Measuring Value Block (scan tool function 08):
The control module can transfer a considerable amount of test data. This test data delivers information on the operational condition of the system and/or sensors connected to it. In many cases, the transferred test data supports troubleshooting and repair. The test data has been summarized into single display groups because all the information cannot be evaluated at the same time. The information can be selected via display group numbers.

Multifunction Transmission Range (TR) switch -F125-:
Electrical switches with various tasks.

Emergency running:
If a sensor fails, the control module selects replacement signals and introduces replacement functions. If this is not possible, the emergency running mode is introduced.

Emergency running is a "condition of the control module." When specific malfunctions are recognized, the emergency running mode ensures the vehicle can continue to be driven safely and protects the transmission against damage, while impairing the driving characteristics only as much as is necessary.

On Board Diagnostic (OBD):
This is a diagnostic system of the engine controls that continuously monitors the composition of the engine exhaust gas.

Program card version:
Always use the most up-to-date program card. See scan tool operating instructions.

Sporadic:
Happens occasionally

Transmission Control Module (TCM) -J217-:
The electronic control module defines the shift points with the Dynamic Shift Program (DSP). This monitors the function of the transmission via On Board Diagnostic (OBD). If a component or sensor fails, an emergency running program ensures the vehicle can still be driven.

TDC signal:
The TDC signal is used to calculate the engine speed.

Infinity Ohms:
The resistance is high, or an open circuit.

TDC (torque converter lock-up clutch):
Engine torque is mechanically transferred to the transmission.