Test F: No Communication With The Electronic Automatic Temperature Control (EATC) Module

PINPOINT TEST F: NO COMMUNICATION WITH THE ELECTRONIC AUTOMATIC TEMPERATURE CONTROL (EATC) MODULE

F1-F2:

Normal Operation
Under normal operation, the EATC module receives a ground through circuit 1203 (BK/LB). The EATC module is supplied constant battery voltage through circuit 483 (RD) and ignition switched voltage through circuit 1566 (RD/YE).

Possible Causes
- Fuse(s)
- An open in circuit 1203 (BK/LB), 483 (RD) or 1566 (RD/YE)
- EATC module