Individual Component Inspections

Heater and A/C (B-36), Thermostat (X-5) and Compressor (X-7) Relay






1. Disconnect relays and check for continuity and resistance between relay terminals.
- For handling of these relays, refer to Heater & A/C Relay.



Relays Test
This test is conducted to check Fuel Pump Relay and A/C Clutch for proper operation.

Tech 2 must be used for this test.

Test Procedure:
1. Connect Tech 2 to the vehicle DLC.
2. Ignition SW is "On".




3. Select F3: Miscellaneous Test in the Application Menu.




4. Select F1 : Relay Test in the Miscellaneous Test.




5. Select F0: Fuel Pump Relay.




6. Push "On" soft key.
7. Control Fuel Pump Relay and check data list.
- If the data list changes, the Fuel Pump Relay is normal.

8. Select F1 : A/C Clutch Relay.
9. Run the Engine at idle.




10. Turn on Air Conditioning.
11. Turn "On" and "Off" A/C Switch.
12. Control A/C Clutch Relay and check data list.
- If the data list changes, the Fuel Pump Relay is normal.






1. Disconnect pressure switch connector and check for continuity between pressure switch side connector terminals (1) and (2).






1. Disconnect the resistor (B-3) connector.
2. Check for continuity and resistance between the terminals of the resistor.





1. Disconnect the blower motor (B-5) connector from the blower motor.
2. Connect the battery positive terminal to the No.1 terminal of the blower motor and the negative to the No.2.
3. Be sure to check to see if the blower motor operates correctly.