Control Module HVAC: Testing and Inspection
INSPECTION1. 4-TERMINAL TYPE
(3) - (4): Continuity exists.
(1) - (2): No continuity.
While applying battery voltage to the terminal between (3) and (4), check continuity between (1) and (2).
If no continuity exists, replace the relay with a new one.
2. 5-TERMINAL TYPE
(1) - (2): Continuity exists.
(3) - (4): Continuity exists.
(3) - (5): No continuity.
While applying battery voltage to the terminal between (1) and (2), check continuity between (3) and (5).
If no continuity exists, replace the relay with a new one.