Engine Controls - Revised Diagnostic Chart C-8, TCC

9222buick05

Bulletin
89-6E-15

Date
July, '89

Ref. No.
89-180-6E

Corp. Ref. No.
976502


SUBJECT:
SERVICE MANUAL UPDATE SECTION 6E3-C8-10 DRIVEABILITY EMISSIONS TCC OPERATION

MODELS AFFECTED:
1989 REGALS WITH 3.1L ENGINE (VIN CODE T)


On page 6E3-C8-10 of the 1989 Chassis Service Manual for the Regal model is the following statement:

"The TCC will engage on a warm engine under given road load in 2nd, 3rd, and 4th gears."

It should read as follows:

"The TCC will engage on a warm engine under given road load in 3rd and 4th gear."

Calibration for the 3.1L engine with a 440-T4/Hydramatic 4T60 transaxle does not engage the TCC in second gear.

Please make this correction in your 1989 Chassis Service Manual for the Regal model.