Manufacturer Code Charts: 51

Code No. 51, 86 Incorrect 1st Gear Ratio

Description

After a shift to the 1St speed has been completed, if the value of the PG-A output (input shaft speed) divided by the 1st gear ratio does not coincide with the PG-B output (output shaft speed), code No. 51 is output. If associated diagnostic trouble code (No. 51, 52, 53, 54) is output four times, fail safe code No. 86 is output to indicate that the 1st gear ratio is incorrect and this activates the fail safe function to lock transaxle at the 3rd speed (D) or 2nd speed (2, L).


Probable Cause of Trouble

- Defective pulse generators A and B
- Defective connector
- Defective transfer driven gear
- Defective end clutch retainer
- Defective rear clutch
- Noise generated