Downshift Switch: Testing and Inspection

Kickdown Function, Adapting

If accelerator pedal position sensors or engine control module are replaced kick down function must be adapted on vehicles with automatic transmission.

Special tools, testers and auxiliary items required

• (VAS5051) with (VAS5051/1)





Preconditions

• No DTCs recorded in DTC memory; check Diagnostic Trouble Code (DTC) memory. Refer to => [ DTC Memory, Checking ] DTC Memory, Checking.

• Engine stopped, ignition switched on

Procedure

- Connect testing and information system (VAS5051 ) and select vehicle system "01 -Engine electronics" in selection. Refer to => [ VAS 5051, Connecting and Select Functions ] VAS 5051, Connecting and Select Functions. Ignition must be switched on.

Display on (VAS5051):





- Under - 1 - select diagnostic function "04 - Basic setting".

Display on (VAS5051):





1. Enter display group

- Enter "063" for "display group number 063" in zone - 2 - and confirm entry by pressing Q button.

Display on (VAS5051):





- Activate basic setting by pressing - A - button.

• You will now be instructed to: "Operate kick down".

- Fully depress accelerator pedal beyond kickdown point and keep it pressed.

• During the kickdown point adaptation process, "Kickdown ADP running " is shown on the display. After successful adaptation of the kickdown point "Kickdown ADP OK" appears on the display.

- Check indication in display field - 4 -.

All models:





• "ADP" in display zone 4 stands for adaptation.

• If "ERROR" can be displayed, if e.g. accelerator pedal is not pressed when instructed by tester, or if accelerator pedal was released while adaptation was already running but process was not yet complete. In both cases it is necessary to exit the "Basic setting" mode and restart the adaptation process again. Refer to => [ Kickdown Function, Adapting ] Testing and Inspection.