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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5
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ON-BOARD DIAGNOSTIC [ENTERTAINMENT SYSTEM (WITH CENTER DISPLAY)]

Outline

  • The entertainment system has an on-board diagnostic function and diagnostic assist 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 entertainment system-related parts

    • A memory function, which stores detected DTCs

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

On-board Diagnostic Function

Malfunction detection function

  • Detects malfunctions in the entertainment system.

Memory function

  • If a malfunction is detected in the entertainment system, the connectivity master unit (CMU) stores a DTC.

Display function
    Mazda Modular Diagnostic System (M-MDS) not used

  • To display DTCs on the center display that have been recorded in the memory function, activate the on-board diagnostic function by operating the center display or commander switch. Refer to the [DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT]] in the workshop manual for the activation procedure of the diagnostic assist function.

    Mazda Modular Diagnostic System (M-MDS) used

  • When DTC inspection is performed using the Mazda Modular Diagnostic System (M-MDS), the entertainment system malfunction diagnosis begins. Refer to the [DTC INSPECTION [CONNECTIVITY MASTER UNIT]] in the workshop manual for the DTC troubleshooting procedure.

DTC table
×: Applicable—: Not applicable

DTC No.

Diagnostic assist code*1

Warning/indicator lights

Description

Fail-safe

Drive cycle

Self test type*2

Memory function

B1087:87

03/04

—

Communication error with commander switch

—

—

C

×

B108E:04

03/04

—

Center display internal malfunction

—

—

C

×

B108E:06

03/04

—

HDCP authorization error

—

—

C

×

B108E:1C

03/04

—

Low power supply voltage input to center display

×

—

C

×

B108E:87

03/04

—

Center display circuit malfunction

—

—

C

×

B116A:11

03/04

—

Microphone circuit malfunction

—

—

C

×

B116A:12

03/04

—

Microphone circuit malfunction

—

—

C

×

B116A:92

03/04

—

Microphone circuit malfunction

—

—

C

×

B119F:11

03/04

—

GPS antenna circuit malfunction

—

—

C

×

B119F:13

03/04

—

GPS antenna circuit malfunction

—

—

C

×

B119F:1D

03/04

—

GPS antenna circuit malfunction

—

—

C

×

B119F:92

03/04

—

GPS antenna circuit malfunction

—

—

C

×

B11BA:11

03/04

—

Steering switch circuit malfunction

—

—

C

×

B11BA:15

03/04

—

Steering switch circuit malfunction

—

—

C

×

B1201:11

03/04

—

Steering switch circuit malfunction

—

—

C

×

B1201:15

03/04

—

Steering switch circuit malfunction

—

—

C

×

B1238:01

03/05

—
    Without Bose®

  • Speaker circuit malfunction

    With Bose®

  • Audio amplifier circuit malfunction

—

—

C

×

B1238:16

03/05

—

Tuner and amp unit (TAU) low power supply voltage input

—

—

C

×

B1238:87

03/04

—

HD image transfer circuit malfunction

—

—

C

×

B1252:09

03/04

—

Auxiliary jack/USB port/SD card slot hub circuit malfunction

—

—

C

×

B1252:1D

03/04

—

Auxiliary jack/USB port/SD card slot hub circuit malfunction

—

—

C

×

B1252:87

03/04

—

Communication error with auxiliary jack/USB port/SD card slot hub

—

—

C

×

B1A89:13*3

03/05

—

SiriusXM satellite radio feeder circuit malfunction

—

—

C

×

B1A89:42*3

03/05

—

Tuner and amp unit (TAU) internal malfunction

—

—

C

×

B1D19:64

03/06

—

Incompatible disc inserted

×

—

C

×

B1D19:79

03/06

—

CD player disc read error

×

—

C

×

B1D19:98

03/06

—

Abnormal CD player or temperature

×

—

C

×

U0001:88

03/04

—

Module communication error (HS-CAN)

—

—

C

×

U0028:88

03/04

—

Unit communication error (LOCAL-CAN)

—

—

C

×

U0100:00

03/04

—

Communication error with PCM

—

—

C

×

U0101:00*4

03/04

—

Communication error with TCM

—

—

C

×

U0121:00

03/04

—

Communication error with DSC HU/CM

—

—

C

×

U0131:00

03/04

—

Communication error with electric power steering (EPS) control module

—

—

C

×

U0140:00

03/04

—

Communication error with BCM

—

—

C

×

U0151:00

03/04

—

Communication error with SAS control module

—

—

C

×

U0155:00

03/04

—

Communication error with instrument cluster

—

—

C

×

U0182:00

03/04

—

Communication error with auto leveling control module or adaptive front lighting system (AFS) control module

—

—

C

×

U0184:00

03/04

—

Communication error with tuner and amp unit (TAU)

—

—

C

×

U0187:00

03/04

—

Communication error with CD player

—

—

C

×

U0214:00

03/04

—

Communication error with start stop unit

—

—

C

×

U023A:00

03/04

—

Communication error with forward sensing camera (FSC)

—

—

C

×

U2300:54

03/04

—

Configuration data not received from instrument cluster

—

—

C

×

U2300:55

03/04

—

Instrument cluster configuration not implemented

—

—

C

×

U3000:42

03/04

—

Connectivity master unit (CMU) internal malfunction (poor data read-outs)

—

—

C

×

U3003:16

03/04

—

Low ACC power supply voltage input to connectivity master unit (CMU)

—

—

C

×
*1
The double-digit number indicates the diagnostic assist code with which DTCs can be detected during the DTC inspection using the diagnostic assist function. Refer to the [DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT]] in the workshop manual for the diagnostic assist function activation procedure.
*2
C: CMDTC self test, D:ODDTC self test
*3
With SiriusXM satellite radio system
*4
AT
Detection condition for the applicable DTC

DTC No.

Description

Detection condition

B1087:87

Communication error with commander switch

  • The connectivity master unit (CMU) cannot receive a LIN signal from the commander switch for 5 s or more with the ignition switched ACC or ON (engine off or on).

B108E:04

Center display internal malfunction

  • The connectivity master unit (CMU) detected a center display internal malfunction for 5 s or more with the ignition switched ON (engine off or on).

B108E:06

HDCP authorization error

  • The connectivity master unit (CMU) detected an HDCP authorization error for 5 s or more with the ignition switched ON (engine off or on).

B108E:1C

Low power supply voltage input to center display

  • The connectivity master unit (CMU) detected any of the following conditions for 5 s or more with the ignition switched ON (engine off or on).

    • TFT LCD driver voltage 3.8 V or less

    • LED drive voltage 14.0 V or less

    • Touch panel IC voltage 3.9 V or less

B108E:87

Center display circuit malfunction

  • The connectivity master unit (CMU) cannot receive a signal from the center display for 5 s or more with the ignition switched ON (engine off or on).

B116A:11

Microphone circuit malfunction

  • The connectivity master unit (CMU) detected a short to ground in the microphone circuit for 5 s or more with the ignition switched ON (engine off or on).

B116A:12

Microphone circuit malfunction

  • The connectivity master unit (CMU) detected a short to power supply in the microphone circuit for 5 s or more with the ignition switched ON (engine off or on).

B116A:92

Microphone circuit malfunction

  • The connectivity master unit (CMU) detected microphone circuit voltage of less than 7.7 V or more than 8.6 V with the ignition switched ON (engine off or on).

B119F:11

GPS antenna circuit malfunction

  • Connectivity master unit (CMU) detects GPS antenna circuit voltage of 4.45 V or less with the ignition switched ON (engine off or on).

B119F:13

GPS antenna circuit malfunction

  • The connectivity master unit (CMU) detects an open circuit in the GPS antenna circuit with the ignition switched ON (engine off or on).

B119F:1D

GPS antenna circuit malfunction

  • The connectivity master unit (CMU) detects a current value in the GPS antenna circuit of (31 mA or more) with the ignition switched ON (engine off or on).

B119F:92

GPS antenna circuit malfunction

  • The connectivity master unit (CMU) cannot receive signals from the GPS antenna for 5 s or more with the ignition switched ON (engine off or on).

B11BA:11

Steering switch circuit malfunction

  • The connectivity master unit (CMU) detected a short to ground in the steering switch circuit for 5 s or more with the ignition switched ON (engine off or on).

B11BA:15

Steering switch circuit malfunction

  • The connectivity master unit (CMU) detected an open circuit or a short to the power supply in the steering switch circuit for 5 s or more with the ignition switched ON (engine off or on).

B1201:11

Steering switch circuit malfunction

  • The connectivity master unit (CMU) detected a short to ground in the steering switch circuit for 5 s or more with the ignition switched ON (engine off or on).

B1201:15

Steering switch circuit malfunction

  • The connectivity master unit (CMU) detected an open circuit or a short to the power supply in the steering switch circuit for 5 s or more with the ignition switched ON (engine off or on).

B1238:01
    Without Bose®

  • Speaker circuit malfunction

    With Bose®

  • Audio amplifier circuit malfunction
    Without Bose®

  • The connectivity master unit (CMU) detected a short to ground or short to power supply in the speaker circuit with the ignition switched ON (engine off or on).

    With Bose®

  • The connectivity master unit (CMU) detected a short to ground or short to power supply in the audio amplifier circuit with the ignition switched ON (engine off or on).

B1238:16

Tuner and amp unit (TAU) low power supply voltage input

  • Connectivity master unit (CMU) detects power supply circuit voltage for tuner and amp unit (TAU) of less than 10 V for 10 s or more with the ignition switched ON (engine off or on).

B1238:87

HD image transfer circuit malfunction

  • The connectivity master unit (CMU) detects a communication error in the HD image transfer circuit for 20 times with the ignition switched ON (engine off or on).

B1252:09

Auxiliary jack/USB port/SD card slot hub circuit malfunction

  • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) detects a voltage value for the auxiliary jack/USB port/SD card slot hub circuit of within 4.8 V or exceeding 5.2 V.

B1252:1D

Auxiliary jack/USB port/SD card slot hub circuit malfunction

  • The connectivity master unit (CMU) detects over-current (550 mA or more) in auxiliary jack/USB port/SD card slot hub circuit with the ignition switched ON (engine off or on).

B1252:87

Communication error with auxiliary jack/USB port/SD card slot hub

  • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a signal from the auxiliary jack/USB port/SD card slot hub.

B1A89:13*3

SiriusXM satellite radio antenna feeder circuit malfunction

  • The connectivity master unit (CMU) detects an open circuit in SiriusXM satellite radio antenna feeder circuit with the ignition switched ON (engine off or on).

B1A89:42*3

Tuner and amp unit (TAU) internal malfunction

  • The connectivity master unit (CMU) detects an XM module malfunction in the tuner and amp unit (TAU) with the ignition switched ON (engine off or on).

B1D19:64

Incompatible disc inserted

  • With the ignition switched ON (engine on or off), the connectivity master unit (CMU) detects a disc having a data format that is incompatible with the CD player.

B1D19:79

CD player disc read error

  • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) detects a disc read error.

B1D19:98

Abnormal CD player or temperature

  • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) detects an abnormally high temperature condition in the CD player.

U0001:88

Module communication error (HS-CAN)

  • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot detect a CAN bus communication line (HS-CAN) signal for 1 s or more.

  • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) detects malfunction in the CAN bus communication line (HS-CAN) 10 times continuously.

U0028:88

Unit communication error (LOCAL-CAN)

  • The connectivity master unit (CMU) detects CAN bus communication line (LOCAL-CAN) malfunction 10 times continuously.

U0100:00

Communication error with PCM

  • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the PCM for 5 s or more.

U0101:00*4

Communication error with TCM

  • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the TCM for 5 s or more.

U0121:00

Communication error with DSC HU/CM

  • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the DSC HU/CM for 5 s or more.

U0131:00

Communication error with electric power steering (EPS) control module

  • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the electric power steering (EPS) control module for 5 s or more.

U0140:00

Communication error with BCM

  • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the BCM for 5 s or more.

U0151:00

Communication error with SAS control module

  • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the SAS control module for 5 s or more.

U0155:00

Communication error with instrument cluster

  • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the instrument cluster for 5 s or more.

U0182:00

Communication error with auto leveling control module or adaptive front lighting system (AFS) control module

  • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the auto leveling control module or adaptive front lighting system (AFS) control module for 5 s or more.

U0184:00

Communication error with tuner and amp unit (TAU)

  • The connectivity master unit (CMU) cannot receive a CAN signal from the tuner and amp unit (TAU) for 5 s or more.

U0187:00

Communication error with CD player

  • The connectivity master unit (CMU) cannot receive a CAN signal from the CD player for 5 s or more.

U0214:00

Communication error with start stop unit

  • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the start stop unit for 5 s or more.

U023A:00

Communication error with forward sensing camera (FSC)

  • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the forward sensing camera (FSC) for 5 s or more.

U2300:54

Configuration data not received from instrument cluster

  • The connectivity master unit (CMU) cannot receive the configuration data from the instrument cluster for 30 s or more with the ignition switched ON (engine off or on).

U2300:55

Instrument cluster configuration not implemented

  • The connectivity master unit (CMU) detected any of the following conditions with the ignition switched to ACC or ON (engine off or on).

    • Instrument cluster configuration not read

    • Configuration data cannot be written to connectivity master unit (CMU) memory.

U3000:42

Connectivity master unit (CMU) internal malfunction (poor data read-outs)

  • The connectivity master unit (CMU) cannot read data from the NVRAM in the connectivity master unit (CMU) with the ignition switched to ACC or ON (engine off or on).

U3003:16

Low ACC power supply voltage input to connectivity master unit (CMU)

  • The connectivity master unit (CMU) detects ACC power supply circuit voltage of 8.0 ± 0.8 V or less for 10 s or more with the ignition switched to ACC or ON (engine off or on).

Diagnostic Assist Function

  • The diagnostic assist function is a function for forcibly operating entertainment system related parts to verify their connection condition and operation status. In addition, the specifications of the entertainment system related parts are displayed in the center display where they can be verified. Refer to the [DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT]] in the workshop manual for the diagnostic assist function activation procedure.

Diagnostic assist code list

No.

Center display (diagnostic content)

Function

Content

01

CD Test

CD player inspection

The CD player inspection results are displayed in the center display.

02

Clear DTC

DTC clearing

Clears the DTCs.

NOTE:

  • DTC clearing is performed in the following order, and a message is displayed each time to indicate the DTCs are cleared.

    • Connectivity master unit (CMU)

    • Tuner and amp unit (TAU)

    • CD player

03

Read AVC DTC

Inspection of all DTCs related to module

Displays the DTCs of the entertainment system related parts.

NOTE:

  • Detection of DTCs is limited if the ignition is in the ACC position. Refer to the workshop manual for details.

04

Read CMU DTC

DTC inspection for connectivity master unit (CMU)

The connectivity master unit (CMU) DTCs are displayed in the center display.

05

Read TAU DTC

DTC inspection for tuner and amp unit (TAU)

The tuner and amp unit (TAU) DTCs are displayed in the center display.

06

Read CD DTC

DTC inspection for CD player

The CD player DTCs are displayed in the center display.

07

Read DTV DTC

Does not operate due to unavailability of applicable DTC.

08

Software Reset AVC

Do not operate because item is for manufacturer use.

09

Software Version Display (CD)

Software version verification

Displays the CD player software version.

10

Part Number Readout CD/DVD

Part number verification

Displays the CD player part number (first four digits)

21

DVD Test Mode Enable

Do not operate because item is for manufacturer use.

22

DVD Test Mode Disable

Do not operate because item is for manufacturer use.

24

Vehicle Data Transfer

Do not operate because item is for manufacturer use.

25

Antenna Continuity Status

Do not operate because item is for manufacturer use.

26

DTV Test Mode ON

Do not operate because item is for manufacturer use.

27

DTV Test Mode OFF

Do not operate because item is for manufacturer use.

28

HD Certification AM (Main Tuner)

Do not operate because item is for manufacturer use.

53

Software Version Display (CMU)

Software version verification

Displays the connectivity master unit (CMU) (overall entertainment system (with center display)) software version.

57

Software Version Display (VIP)

Software version verification

Displays the connectivity master unit (CMU) (overall communication with vehicle) software version.

58

Vehicle Info

Configuration information verification

  • Displays the following configuration information in the center display.

    • Destination

    • CMU Types

59

CMU Serial Number Readout

Individual number verification

Displays the unique number verification of the connectivity master unit (CMU) in the center display.

61

Vehicle Signal (Unit Status)

Vehicle signal verification

  • Displays the following vehicle signal information in the center display.

    • Rear mount camera signal input condition

    • Steering switch signal (volume adjustment switch, cue/automatic band selector switch) input condition

    • Steering switch signal (talk button, pick-up button, hang-up button) input condition

    • Commander switch signal input condition

    • GPS antenna signal input condition

    • Microphone signal input condition

    • Auxiliary jack/USB port/SD card slot hub 1 signal input condition

    • SD card insertion condition

    • CD or DVD equipment recognition condition

    • TV tuner unit equipment recognition condition

65

Commander and Switch Check

Switch inspection

Displays the steering switch or commander switch operation content in the center display.

NOTE:

  • If the operation content previously detected is being displayed in the center display, newly detected content is added over it.

68

Software version display (TFT Display)

Software version verification

Displays the center display (TFT LCD screen control) software version.

69

Software version display (Touch Panel)

Software version verification

Displays the center display (touch panel control) software version.

70

Display Check

Display/touch panel inspection

  • Displays the display/touch panel inspection results in the center display.

    • Unicolor screen in the following colors

      • White→Black→Red→Green→Blue

    • Horizontal-striped screen in black and the following colors

      • Red→Green→Blue

    • Vertical-striped screen in black and the following colors

      • Red→Green→Blue

    • Checkered screen in black and the following colors

      • Red→Green→Blue

    • Returns to 1.

NOTE:

  • The display/touch panel inspection is repeated periodically until the same location on the center display is touched for 10 s or more.

72

GPS Data

GPS information verification

  • Displays the following GPS information in the center display.

    • Longitude (X) (Degree of longitude in GPS information of the current location)

    • Latitude (Y) (Degree of latitude in GPS information of the current location)

    • Absolute Time (Z) (Date and time information (GMT))

    • Number of Satellites (Number of satellites being received)

84

Maker code Display TAU

Manufacturer verification

Displays the tuner and amp unit (TAU) manufacturer in the center display.

85

Part Number Readout TAU

Part number verification

Displays the tuner and amp unit (TAU) part number (first 4 digits).

86

Radio Test Mode AM (Main)

Do not operate because item is for manufacturer use.

87

HD Certification FM (Main Tuner)

Do not operate because item is for manufacturer use.

88

HD Certification FM (Sub Tuner)

Do not operate because item is for manufacturer use.

89

XM Certification

Do not operate because item is for manufacturer use.

90

AM Reception Sensitivity Level Test

Radio reception condition inspection

Displays the radio reception condition in the center display.

91

Radio Test Mode FM (Main)

Do not operate because item is for manufacturer use.

92

Radio Test Mode FM (Sub)

Do not operate because item is for manufacturer use.

93

Software Version Display (TAU)

Software version verification

Displays the tuner and amp unit (TAU) software version.

94

Speaker Cyclic Test (FM)

Speaker Inspection

Outputs sound from the speakers in the following order:

    Without Bose®

  • Door speaker (LH) and tweeter (LH)

  • Door speaker (RH) and tweeter (RH)

  • Driver-side headrest speaker (RH)

  • Driver-side headrest speaker (LH)

    With Bose®

  • Door speaker (LH) and tweeter (LH)

  • Door speaker (RH) and tweeter (RH)

  • Driver-side headrest speaker (RH) and passenger-side headrest speaker (RH)

  • Driver-side headrest speaker (LH) and passenger-side headrest speaker (LH)

  • Woofer

95

Vehicle Info Display (TAU)

Do not operate because item is for manufacturer use.

96

XM Serial Number

Do not operate because it is displayed, but, not function.

97

Radio Electric Field Strength (AM)

Do not operate because item is for manufacturer use.

98

Radio Electric Field Strength (FM)

Do not operate because item is for manufacturer use.

99

Software Update

Do not operate because item is for manufacturer use.
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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

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