Toyota CH-R Service Manual: Vehicle Speed Signal Circuit between Navigation ECU and Combination Meter

HINT:

• A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly. The signal is changed to a pulse signal at the transistor in the combination meter assembly. Each ECU controls its respective systems based on this pulse signal.
• If a short occurs in any of the ECUs or in the wire harness connected to an ECU, all systems in the following diagram will not operate normally.

NOTICE:

• Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System.

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• When replacing the radio and display receiver assembly or navigation ECU, always replace it with a new one. If a radio and display receiver assembly or navigation ECU which was installed to another vehicle is used, the following may occur:
  • A communication malfunction DTC may be stored.
  • The radio and display receiver assembly or navigation ECU may not operate normally.

Mute Signal Circuit between Radio Receiver and Telematics Transceiver

DESCRIPTION The telematics transceiver sends a mute signal to the radio and display receiver assembly. The radio and display receiver assembly controls the volume according to the mute signal fr ...

Reverse Signal Circuit

DESCRIPTION The radio and display receiver assembly receives a reverse signal from the park/neutral position switch. WIRING DIAGRAM PROCEDURE 1. CHECK VEHICLE SIGNAL (OP ...

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