Component Tests and General Diagnostics

Checking the supply voltage/ground terminal

Voltage supply Power-Operated Tailgate Module (POT)
Power Operated Tailgate Module (POT) is supplied with voltage via a voltage input on the control module.
Voltage input # C1-1 (#1) is supplied with +30 via a fuse from the battery. It will not be possible to activate the control module if there is an open-circuit.

Checking the power supply
Check the power supply cable from the battery to the Power Operated Tailgate Module (POT) #C 1-1 (#1). Check for open circuit, loose connections, contact resistance, and oxidation. Check the fuse. The voltage must be battery voltage.

Ground connection Power-Operated Tailgate Module (POT)
Power Operated Tailgate Module (POT) has a ground input. The ground input from the unit is power ground and is connected to the ground terminal in the car body. See the relevant wiring diagram for further information about the ground terminal.

Checking the ground terminal
Check the ground cable between the Power-Operated Tailgate Module (POT) #C 1-2 (#2) and ground terminal for open circuit, loose connections, contact resistance, and oxidation. With the ignition on, the drop in voltage between the ground connection for the control module and the ground terminal must not be greater than 0.5 V.
Remedy as necessary.

Other information
- Signal specification Signal Description, Power-Operated Tailgate Module (POT)
- Location of components Locations
- See the relevant wiring diagram for information about circuit and ground terminals in the bodywork
- Checking wiring and terminals Checking Wiring and Terminals

-------------------------------------------------