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Home >> Subaru >> 2012 >> Forester X, Automatic Trans >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission - Mechanism & Function (4AT) >> Transmission Control Module (TCM) >> Can Communication Signals Control >> Main signals sent and received for transmission control
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Main signals sent and received for transmission control

  TCM ECM ABSCM&H/U Body integrated unit Combination meter
Sports mode switch-cum-manual mode switch signal IN     OUT  
Upshift signal (manual mode) IN     OUT  
Downshift signal (manual mode) IN     OUT  
Brake switch signal IN     OUT  
ABS signal IN   OUT    
ENG AT cooperation signal IN OUT      
OUT IN      
Range position signal OUT IN   IN/OUT IN
AT warning light signal (SPORT indicator light) OUT     IN/OUT IN
Sports shift warning buzzer signal OUT     IN/OUT IN
AWD warning light signal
Also used as FWD indicator light signal
OUT     IN/OUT IN
IN: received
OUT: sent