2006 Lexus SC 430 — Service Manual
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Control Module HVAC: Testing and Inspection

TERMINALS OF ECU

1. CHECK AIR CONDITIONING AMPLIFIER ASSY (A/C CONTROL ASSY)

Terminals Of Control Module/Pinouts (Part 1)):




Terminals Of Control Module/Pinouts (Part 2):




Terminals Of Control Module/Pinouts (Part 3):




Terminals Of Control Module/Pinouts (Part 4):




a. Measure the voltage and resistance of the connectors. If the result is not as specified, the A/C amplifier may have a malfunction.

2. CHECK ECM

Terminals Of Control Module/Pinouts (Part 5):




Terminals Of Control Module/Pinouts (Part 6):




Oscilloscope Waveform:




a. Measure the voltage and resistance of the connectors. If the result is not as specified, the ECM may have a malfunction.