Retrieving Diagnostic Trouble Codes: Notes

WARNING: This page is about a different car, the 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Always record DTCs during retrieval, DTCs will be erased from memory when DTCs are retrieved.

A/C-heater control assembly monitors system circuits and stores a Diagnostic Trouble Code (DTC) in memory if a problem is detected. All DTCs are stored in memory, except DTC 22. Malfunction is current if DTC 22 is displayed. DTCs are displayed at A/C-heater control assembly temperature display. See Figure. DTCs can also be displayed using a scan tool.