Auxiliary Heater Element Relay: Testing and Inspection

AIR CONDITIONING: PTC HEATER RELAY: ON-VEHICLE INSPECTION

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.

2. REMOVE PTC HEATER RELAY (PTC HTR 1, PTC HTR 2, PTC HTR 3)





(a) Remove the 3 PTC heater relays from the No. 5 relay box.

3. INSPECT PTC HEATER RELAY (PTC HTR 2)





(a) Measure the resistance of the relay.

Standard resistance:





* If the result is not as specified, replace the relay.

4. INSPECT PTC HEATER RELAY (PTC HTR 1, PTC HTR 3)





(a) Measure the resistance of the magnet clutch relay.

Standard resistance:





* If the result is not as specified, replace the relay.

5. INSTALL PTC HEATER RELAY

6. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL

7. PERFORM INITIALIZATION

(a) Perform initialization Repair Instruction - Initialization.

NOTICE:
Certain systems need to be initialized after disconnecting and reconnecting the cable from the negative (-) battery terminal.