EF1 speed sensor turbineunrealistic frequency falloff
Switch off ignition; Disconnect electronics from transmission; Connect terminal tester between TCU and transmission; Switch on ignition; Measure voltage between pin 2 (EF1) and pin 6 (AU1), nominal value: 9 V; Switch off ignition; Disconnect electronics; Measure resistance between pin 6 (AU1) and ground / housing, nominal value: > 10 Mohm; Measure resistance between pin 2 (EF1) and ground / housing, nominal value: > 10 Mohm; If you find deviations from nominal value, check wiring, component, and TCU;
What you'll see
No driver-visible symptom recorded.
System reaction
Deactivate Neutral Standby;Deactivate Automatic Idle Shift;;;;;;Switch to duty cycle signal Limp Home from Shift Console;EFP restrictions;short time slip of lock up clutch locks;
Diagnostic depth
Speed drops to 0 rpm in a few milliseconds; Speed > 1000 rpm
Increased fuel consumption; Reduced driving performance;;