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.

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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