Test TC: Step 50

50) Code 66: Attempt To Generate Code 56  Code 66 indicates that TOT signal is less than 0.15 volt (Self-Test minimum value). Possible causes for this fault are: faulty TOT sensor, grounded harness or faulty ECA. Turn key off and wait 10 seconds, disconnect transmission connector from bulkhead connector. Inspect for corroded or damaged pins. Service or repair as necessary. Run KOEO Self-Test. If Code 56 is present, service or replace TOT sensor. If Code 56 is not present, go to next step.