Air Conditioning System (for Manual Air Conditioning System)

AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air Conditioning System): TERMINALS OF ECU

1. CHECK AIR CONDITIONING AMPLIFIER





(a) Measure the voltage of the connectors.

HINT
Check from the rear of the connector while it is connected to the air conditioning amplifier.









HINT
*1: w/ PTC Heater

*2: for TMC Made

*3: for TMMI Made

(b) Using an oscilloscope, check waveform 1.









(c) Using an oscilloscope, check waveform 2.









HINT
When the blower level is increased, the duty ratio changes accordingly.

(d) Using an oscilloscope, check waveform 3.









HINT
The waveform varies depending on the CAN communication signal.

(e) Using an oscilloscope, check waveform 4.









HINT
The waveform varies depending on the CAN communication signal.

(f) Using an oscilloscope, check waveform 5.









HINT
The waveform varies depending on the CAN communication signal.

2. CHECK FRONT AIR CONDITIONING CONTROL





(a) Measure the voltage of the connectors.