OPERATION PRINCIPLE Functional Circuit Diagram

AV communication line / CAN (1) | : A/C switch signal : Blower fan motor switch signal | CAN (2) | : A/C compressor request signal

Functional Initial Inspection Chart

Control unit | Diagnosis item | Location
A | B | C | D
A/C auto amp. | “HVAC” | Self-diagnosis | × | ‐ | ‐ | ‐
Data monitor | × | ‐ | ‐ | ‐
Active test | × | ‐ | ‐ | ×
ECM | “ENGINE” | Self-diagnosis function (CAN system diagnosis) | ‐ | ‐ | × | ‐
Data monitor | ‐ | × | × | ‐
IPDM E/R | “IPDM E/R” | Self-diagnosis function (CAN system diagnosis) | ‐ | ‐ | ‐ | ×
Data monitor | ‐ | ‐ | × |
Auto active test | ‐ | ‐ | ‐ | ×