ON-BOARD DIAGNOSTIC SYSTEM FUNCTION [HANDS-FREE TELEPHONE (HF/TEL) SYSTEM]

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• The on-board diagnostic system has a self-diagnostic function and diagnostic assist function to help technicians locate malfunctions.

Self-diagnostic Function

Malfunction detection function

• The malfunction detection function detects malfunctions occurring in the Bluetooth system.

Memory function

• The error currently occurring is stored as a present malfunction. Up to three DTCs can be stored as a present malfunction. The error that has previously occurred is stored as a past malfunction.

Display function

• When the self-diagnostic function is activated, the information display displays the DTC stored in the memory.

• The DTC consists of the following codes and numbers:

― Malfunction type

― Device code

― Error code

• Refer to the Workshop Manual for the display method.

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DTC table

Screen display

Inferred cause/verified content

DTC

26: Er81

CAN system

26: Er82

Short to power supply in wiring harness between microphone (Input signal) and HF/TEL unit

26: Er83

Short to GND/power supply in microphone power supply circuit

26: Er84

Any of the following is detected:

•  The microphone power supply circuit is not connected.

•  Open circuit in the microphone input circuit

•  Microphone input circuit short to body ground

26: Er85

•  Poor contact in the voice recognition/hands-free switch or HF/TEL unit connector

•  Voice recognition/hands-free switch malfunction

26: Er86

HF/TEL unit malfunction

no Err

DTC is not recorded.

Screen display	Inferred cause/verified content
26: Er81	CAN system
26: Er82	Short to power supply in wiring harness between microphone (Input signal) and HF/TEL unit
26: Er83	Short to GND/power supply in microphone power supply circuit
26: Er84	Any of the following is detected: • The microphone power supply circuit is not connected. • Open circuit in the microphone input circuit • Microphone input circuit short to body ground
26: Er85	• Poor contact in the voice recognition/hands-free switch or HF/TEL unit connector • Voice recognition/hands-free switch malfunction
26: Er86	HF/TEL unit malfunction
no Err	DTC is not recorded.

Diagnostic Assist Function

• The diagnostic assist function displays the operating condition of the following functions (components) and forces them to operate in order to examine whether they are malfunctioning or not.

• For the start procedure of each mode, refer to the Workshop Manual.

Software version verification

• Displays the software version on the information display.

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Connection condition verification

• Displays the connection status on the information display and examines the HF/TEL system-related unit, wiring harness, and connector.

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Password reset

• Operate the switch and reset the password.

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