Check Code Table

WARNING: This page is about a different car, the 2008 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CODE CHART

Check code	Check item	Related items
01	Information display	CAN system DTC U2516: CAN system communication error
02	Audio unit Climate control unit Instrument cluster	CAN system DTC U0184: Communication error to audio unit DTC U0164: Communication error to climate control unit DTC U0181: Communication error to instrument cluster
04	TNS relay	TNS relay BCM TNS signal wiring harness
-	LCD	LCD

NOTE:

The check codes are displayed in numerical order. (While performing the inspection, if you want to inspect a check code with a number smaller than the code number you are currently inspecting, terminate the check mode then repeat the inspection from the beginning.)

Fig 1: Information Display Input/Output Check Mode - Flow Chart

Courtesy of MAZDA MOTORS CORP.