Heating and Air Conditioning

B1605





Internal control module fault

Fault symptoms
ACC panel does not function.





Diagnostic procedure

1. Internal control module fault
- Change the control module.
- Delete diagnostic trouble codes in all systems.





- Carry out a function check.
- Evaluate the function check.
- Check that the diagnostic trouble code does not recur.

Does the diagnostic trouble code recur?
YES
- See "Before changing a control module." Before Changing a Control Module

NO
- The steps taken to rectify the fault were correct.