Pinout Values and Diagnostic Parameters

AIR CONDITIONING: AIR CONDITIONING SYSTEM: TERMINALS OF ECU

1. Air Conditioning Amplifier

















(*1): w/ Smart Key System

(*2): w/o Smart Key System

(a) waveform 1:





(1) Measure the waveform between terminal D37-11 (BLW), D38-16 (LOUT), D38-8 (ROUT) and body ground or air conditioning amplifier.

OK:

Waveform appears as shown in the illustration.

HINT
As the air flow amount increases, the waveform gets narrow.

(b) waveform 2:





(1) Measure the waveform between terminal D37-9 (LOCK) and body ground of air conditioning amplifier

OK:

Waveform appears as shown in the illustration.

(c) waveform 3:





(1) Measure the waveform between terminal D37-28 (TACO) and body ground of air conditioning amplifier

OK:

Waveform appears as shown in the illustration.

HINT
As the engine speed becomes faster, the waveform gets narrow.

2. A/C Control Assembly