AIR MIX ACTUATOR INSPECTION

B3E074061415W02

1. Connect battery positive voltage to air mix actuator terminal D (or F), connect terminal F (or D) to ground, and then verify that the air mix actuator operates as shown in the table.

• If the operation condition is not normal, replace the air mix actuator.

Terminal

Air mix actuator operation

D

F

B+
Ground
HOT→COLD
Ground
B+
COLD→HOT

2. Verify that the resistance between terminals B and C, and C and A matches the air mix actuator operation as shown in the graph.

• If the operation condition and resistance are not normal, replace the air mix actuator.