AB C. Overview

General





The control module has a built-in diagnostic system, Volvo on-board diagnostic (OBD) system II, which continuously monitors itself and its input and output signals. The control module designation is the convertible top control unit.

Diagnostic trouble codes (DTCs)

The control module will store a diagnostic trouble code (DTC) if it detects a fault. The control module can store up to 34 diagnostic trouble codes (DTCs).

If for some reason a fault disappears after the diagnostic trouble code (DTC) has been permanently stored in the control module, information about the fault is stored in the control module (the exception is diagnostic trouble code (DTC) CCU-210 - no vehicle speed signal).

Reading off the Volvo on-board diagnostic (OBD) system





Fault data and other information can be read off using the VADIS PC which is connected to the data link connector (DLC) under the center console cover.

Volvo on-board diagnostic (OBD) system

With the VADIS PC it is possible to:

^ read off and erase stored diagnostic trouble codes (DTCs).
^ calibrate the soft-top and the control module.
^ continuously monitor the value and status of input and output signals.
^ activate certain functions.
^ program the control module with certain information.
^ read off control module identification.

To activate the Volvo on-board diagnostic (OBD) system:

- ignition on.
- normal battery voltage.

Reading and erasing diagnostic trouble codes (DTCs)

Stored diagnostic trouble codes (DTCs) can be read off and erased using this function. The on-board diagnostic (OBD) system can identify several types of fault in the form of diagnostic trouble codes (DTCs).

Diagnostic trouble codes (DTCs) can only be erased when all diagnostic trouble codes (DTCs) have been in the read at least once.

Reading off input and output signals

Using this function, the values and status of the control module input and output signals can be continuously read off.

The following parameters can be read off:

- Battery voltage.
- Power supply to position sensor.
- Position sensor.
- Micro-switch status.

Activating components / functions

Components / functions in the convertible system can be activated using this option.

The following components can be activated:

- Soft-top left / right motor.
- Tensioner rib left / right motor.
- Cover lock motor.
- Rear locking arms.
- Front soft top roof locking.

Calibrating and programming data

This option calibrates the soft top roof for fault free operation. The soft top roof sensor values must be programmed and calibrated when replacing / adjusting the soft-top, and replacing the control module or potentiometer.

Reading off the control module identification

The control module can be identified by reading off a code from the control module memory. This code contains information about the control module P/N.