Test J: the Defrost System Is Inoperative

PINPOINT TEST J: THE DEFROST SYSTEM IS INOPERATIVE

J1:

J2-J3:

J3-J4:

J5-J6:

J6-J8:

J8 Continued:

Normal Operation
The heated rear window relay, which is integral to the battery junction box (BJB), receives power from circuit CBP45 (YE). When the heated rear window switch is pressed on the electronic automatic temperature control (EATC) or electronic manual temperature control module (EMTC) control unit, the EATC or EMTC grounds circuit CH122 (WH/OG) to activate the heated rear window relay. When the heated rear window relay is activated, power is sent from the heated rear window relay to the heated rear window grid through circuit CRD06 (BN/YE). The heated rear window grid is grounded through circuit GD149 (BK/GY).

Possible Causes
- Fuse(s)
- Open in circuit CBP45 (YE), CH122 (WH/OG), CRD06 (BN/YE) or GD149 (BK/GY)
- Heated rear window relay
- Inoperative EATC or EMTC