Mazda 3 Service Manual: Information Display Input/Output Check Mode

NOTE:

Check Code Table

Check code	Check item	Related items
01	Information display Multi 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	Light switch	TNS relay Light switch BCM
06	Ignition switch1/Push button start2	Ignition switch1/Push button start2
07	Dimmer cancel switch (Instrument cluster)	Instrument cluster Related wiring harness
—	LCD	LCD

*1 Without advanced keyless entry and push button start system *2 With advanced keyless entry and push button start system 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.)

Check Code Inspection Check code 01

Check code 01	CAN system
DISPLAY	ACTION
	CAN system of information display or multi information display is normal.
	CAN system communication error. (DTC U2516).

Check code 02

Check code 02	Communication status to audio unit Communication status to climate control unit Communication status to instrument cluster
INSPECTION CONDITION	DISPLAY	ACTION
If there is a malfunction, the diagnostic results are displayed once each in the order of audio unit and climate control unit and instrument cluster.		All communications are normal.
	Audio unit	Communication to audio unit is normal.
		Communication error to audio unit. (DTC U0184).
		Vehicle without audio unit.
	Climate control unit	Communication to climate control unit is normal.
		Communication error to climate control unit. (DTC U0164).
		Vehicle without climate control unit.
	Instrument cluster	Communication to instrument cluster is normal.
	Instrument cluster	Communication error to instrument cluster. (DTC U0181).

Check code 04

Check code 04		TNS ON/OFF signal
STEP	INSPECTION CONDITION	DISPLAY	ACTION
1	Turn the light switch to the ON position.		Go to the next step.
			Verify that the voltage of information display or multi information display terminal 1B is B+ . If the voltage is as specified, replace the information display or multi information display. If the voltage is not as specified, inspect the following parts: TNS relay Light switch BCM Wiring harness (Light switch—BCM—TNS relay—information display or multi information display)
2	Turn the light switch off.		Verify that the voltage of the information display or multi information display terminal 1B is 1.0 V or less . If the voltage is as specified, replace the information display or multi information display. If the voltage is not as specified, inspect the following parts: TNS relay Light switch BCM Wiring harness (Light switch—BCM—TNS relay—information display or multi information display)
			Input signal to the information display or multi information display is normal.

Check code 06

Check code 06		Ignition switch ON/OFF signal
STEP	INSPECTION CONDITION	DISPLAY	ACTION
1	Switch the ignition to ON.		Go to the next step.
			Verify that the voltage of information display or multi information display terminal 1E is B+ . If the voltage is as specified, replace the information display or multi information display. If the voltage is not as specified, inspect the following parts: Ignition switch1 Push button start2 Relay block2 Wiring harness1 (Battery—ignition switch—information display or multi information display) Wiring harness*2 (Battery—relay block—push button start—information display or multi information display)
2	Switch the ignition to ACC.		Verify that the voltage of the information display or multi information display terminal 1E is 1.0 V or less . If the voltage is as specified, replace the information display or multi information display. If the voltage is not as specified, inspect the following parts: Ignition switch1 Push button start2 Relay block2 Wiring harness1 (Battery—ignition switch—information display or multi information display) Wiring harness*2 (Battery—relay block—push button start—information display or multi information display)
			Input signal to the information display or multi information display is normal.

*1 Without advanced keyless entry and push button start system *2 With advanced keyless entry and push button start system Check code 07

Check code 07		Dimmer cancel ON/OFF signal
STEP	INSPECTION CONDITION	DISPLAY	ACTION
1	Panel light control switch turned to dimmer cancel ON		Go to the next step.
			Verify that the voltage of information display or multi information display terminal 1B is B+ . If the voltage is as specified, replace the information display or multi information display. If the voltage is not as specified, inspect the following parts: Instrument cluster Wiring harness (information display or multi information display—instrument cluster)
2	Panel light control switch turned to dimmer cancel OFF		Verify that the voltage of the information display or multi information display terminal 1B is 1.0 V or less . If the voltage is as specified, replace the information display or multi information display. If the voltage is not as specified, inspect the following parts: Instrument cluster Wiring harness (information display or multi information display—instrument cluster)
			Input signal to the information display or multi information display is normal.

LCD Information display

Check code —	LCD
DISPLAY	ACTION
	All segments and dots illuminated.	LCD is normal.
	Except above	Replace the information display.

Multi information display

Check code —	LCD
DISPLAY	ACTION
	All segments and dots illuminated.	LCD is normal.
	Except above	Replace the multi information display.

Information Display Input/Output Check Mode