ISAT Scan Tool Diagnostics Mode
ISAT scan tool diagnostics modeA number of the outputs from the Automatic Climate Control (ACC) control module can be controlled using the ISAT scan tool "ACTIVATE", provided that the following two criteria are met:
- Battery positive voltage is between 10 and 16 volts.
- The speed of the car is 0 km/h.
If one of these criteria is not met, the ACC control module will not execute the commands from the ISAT scan tool.
This will also be shown on the ISAT scan tool.
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.