Diagnostic Mode and DTC Detection

Diagnostic Trouble Code Detection
When reading diagnostic trouble codes from the ACC control module on the ISAT scan tool, the following procedure should be followed:
1. Cancel any manual selections and then test drive the car.
2. Read the diagnostic trouble codes and write them down on paper.
3. Calibrate.
4. Read out the diagnostic trouble codes again and write down any further diagnostic trouble codes.
5. Remedy the diagnostic trouble codes.
6. Calibrate.

This routine should be followed as diagnostic trouble codes B2403 and B2493 can only be detected through calibration.
Make a habit of always calibrating after working on the ACC system. Calibration is carried out so that the control module can set the stepping motor end positions.
These disappear if the +30 voltage is broken.