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2016 – MX-5 – Body and Accessories

ON-BOARD DIAGNOSTIC [AUDIO AMPLIFIER (WITH CENTER DISPLAY)]

Outline

• The audio amplifier has an on-board diagnostic function to facilitate system diagnosis.

Function

• The on-board diagnostic function consists of the following functions:

• A malfunction detection function, which detects overall malfunctions in the audio amplifier-related parts

• A memory function, which stores detected DTCs

• A display function, which indicates system malfunctions via DTC display.

On-board Diagnostic Function

Malfunction detection function

• Detects malfunctions in input/output signals.

• If a malfunction occurs, the audio amplifier records the malfunction as a DTC. A recorded DTC can be read by the Mazda Modular Diagnostic System (M-MDS).

Memory function

• Stores malfunctions detected by the malfunction detection function as DTCs in the audio amplifier. The detected DTCs are not cleared even if the ignition is switched off or the negative battery cable is disconnected.

Display function

• Using the Mazda Modular Diagnostic System (M-MDS), DTCs can be read out and deleted.

DTC table

×: Applicable—: Not applicable

DTC	Warning/indicator light	Description	Fail-safe	Drive cycle	Self-test type*1	Memory function
U0001:88	—	Module communication error (HS-CAN)	—	—	C	×
U2300:54	—	Configuration error (data not received)	—	—	C	×
U2300:55	—	Configuration error (not configured)	—	—	C	×
U2300:56	—	Configuration error (Ineffective/ non-interchangeable data read)	—	—	C	×
U2300:64	—	Configuration error (error value read)	—	—	C	×
U3000:49	—	Audio amplifier internal malfunction	—	—	C	×
U3003:16	—	Audio amplifier low power supply voltage input	—	—	C	×
U3003:17	—	Audio amplifier high power supply voltage input	—	—	C	×

^*1

C: CMDTC self test

DTC 7-digit code definition

• When related systems or components have failed, the CM stores the DTC of the malfunctioning part in the CM memory, and allows for the retrieval of the store data using scanning tool when necessary. The DTCs are indicated using seven digits. Each digit indicates the following.

  

Status byte for DTC

• The two digits (two digits after hyphen (-)) after the seven-digit DTC.

  

• A code which indicates the pending code, current/past malfunction status, or warning illumination status.

• Can be read by performing a CMDTC self-test using the Mazda Modular Diagnostic System (M-MDS).

• For details, refer to the explanation on the Mazda Modular Diagnostic System (M-MDS) when reading the DTC.

Detection condition for the applicable DTC

DTC No.	Description	Detection condition
U0001:88	Module communication error (HS-CAN)	The audio amplifier detects a CAN bus communication line (HS-CAN) malfunction.
U2300:54	Configuration error (data not received)	Audio amplifier detects configuration data not record or data error
U2300:55	Configuration error (not configured)	Audio amplifier detects configuration data not record or data error
U2300:56	Configuration error (Ineffective/ non-interchangeable data read)	Audio amplifier detects configuration data not record or data error
U2300:64	Configuration error (error value read)	Audio amplifier detects configuration data not record or data error
U3000:49	Audio amplifier internal malfunction	Audio amplifier internal malfunction detected
U3003:16	Audio amplifier low power supply voltage input	Audio amplifier power supply circuit voltage of 9.0±0.8 V or less is detected for 5 s or more with the ignition switched ON (engine off or on).
U3003:17	Audio amplifier high power supply voltage input	Audio amplifier power supply circuit voltage exceeding 16.0±0.8 V is detected for 5 s or more with the ignition switched ON (engine off or on).

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