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Home >> Buick >> 1991 >> Reatta 2D Convertible >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Pcm/BCM >> Diagnostic Flow Charts For ECM/Pcm Codes: EO13 To EO69 >> Code EO36, Shift Control Problem >> Notes
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Code EO36, Shift Control Problem: Notes

The 4T60E transaxle is electronically shifted. Within transaxle are 4 solenoids. Solenoid A is used for 1st and 4th gear operation only. Solenoid b is used for 1st and 2nd gear operation. The remaining 2 solenoids are for TCC operation only. All PRNDL indications are ignored as far as transaxle shifting is concerned except manual low. Code EO36 will set if solenoid "B" failed in the off position, which will cause the transaxle to be in 3rd gear and desired gear is 1st, TPS is greater than 5 percent, VSS is greater than 5 MPH and no code 21, 22 or 24 is present. Code EO will also set if solenoid "B" failed in the on position, which will cause transaxle to be in 1st gear and desired gear is 4th, PRNDL is in 3rd or 4th, TPS is greater than 10 percent and no Code EO31, 21 or 22 is present.