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Test G: The Defrost System Will Not Shut Off Automatically

PINPOINT TEST G: THE DEFROST SYSTEM WILL NOT SHUT OFF AUTOMATICALLY

Normal Operation
During normal operation, the heating ventilation air conditioning (HVAC) module - electronic automatic temperature control (EATC) or HVAC module - electronic manual temperature control (EMTC) activates the rear window defrost relay by providing ground to the relay coil through circuit CH122 (WH/OG). When the defrost relay is activated, power is supplied from the rear window defrost relay through circuit CRD06 (BN/YE) to the rear window defrost grid. Ground is supplied to the rear window defrost grid through circuit GD147 (BK/VT).


This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Rear window defrost relay
- HVAC module - EMTC or HVAC module - EATC


G1-G2:






G3-G4:




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