Component Tests and General Diagnostics

PTC Heater Circuit

DESCRIPTION
The PTC relay turns on when it receives a signal from the A/C amplifier. As a result, power is supplied to the PTC heater installed on the heater radiator unit sub-assembly.

Wiring Diagram:

Step 1-2:

Step 2(continued)-3:

Step 4-5:

Step 6-7:

INSPECTION PROCEDURE