Van Wagon 2WD L4-2237cc 2.2L (4Y-EC) (1987)
Blower Motor Relay: Testing and Inspection
Heater Blower Relay Internal Schematic
Heater relay
Continuity Test
1.
Using a suitable ohmmeter, ensure continuity does exist between terminals 1 and 3, Fig. 21.
2.
Using a suitable ohmmeter, ensure continuity does exist between terminals 2 and 4.
3.
Using a suitable ohmmeter, ensure no continuity exists between terminals 4 and 5.
5.
If continuity is not as specified in steps 1 through 4, replace heater relay.
Heater Blower Relay Testing
Operation Test
1.
Apply battery voltage accross terminals 1 and 3.
2.
Check that there is continuity between terminals 4 and 5.
3.
Check that there is no continuity between terminals 2 and 4.
4.
If operation is not as specified in step 3, replace heater relay.