Power Supply and Ground Circuit For Auto Amp.

POWER SUPPLY AND GROUND CIRCUIT FOR AUTO AMP.

Description

COMPONENT DESCRIPTION




Unified Meter and A/C Amp. (Automatic Amplifier)
The unified meter and A/C amp. (1) has a built-in microcomputer which processes information sent from various sensors needed for air conditioner operation. The air mix door motor(s), mode door motor, intake door motor, blower motor and compressor are then controlled.

When the various switches and temperature control dial are operated, data is input to the unified meter and A/C amp. from the AV control unit using CAN communication.

Self-diagnosis functions are also built into unified meter and A/C amp. to provide quick check of malfunctions in the auto air conditioner system.




Power Supply and Ground Circuit for Unified Meter and A/C Amp.

Potentio Temperature Control (PTC)
The PTC (1) is built into the preset switch. It can be set at an interval of 0.5 °C (1.0 °F) in the 18 °C (60 °F) to 32 °C (90 °F) temperature range by turning temperature control dial. The set temperature is displayed.




Without left and right ventilation temperature separately system




With left and right ventilation temperature separately system

Component Function Check

Step 1:

Diagnosis Procedure

Step 1-4: