Engine Control - New ECM Improves Warm Up Driveability

91toyota03

REF.: ENGINE


NO.: EN91-004


DATE: MAY 10, 1991


MODEL: V V


ENGINE CONTROL COMPUTER


The information contained in this TSB superceeds Volume 10, Engine # 015. That previous TSB should be discarded.

For improved driveability, the ECU programming controlling air fuel ratio during warm-up has been changed.

PRODUCTION EFFECTIVE:

VIN DATE
From JT2VV2 * * -M3017477 November 1990

Note: Production effective breakpoints are for reference only. The Part Number on the ECU in the vehicle should be verified in all instances.


PART NUMBER INFORMATION:

PREVIOUS PART NO. NEW PART NO. YEAR SPEC. TRANS.
89661-32251 89661-32252-84 88/89 Fed MTM
89661-32261 89661-32262-84 88/89 Fed ATM
89661-32441 89661-32442-84 88/89 Cal MTM
89661-32451 89661-32452-84 88/89 Cal ATM
89661-32560 89661-32561-84 90/91 Fed MTM
89661-32570 89661-32571-84 90/91 Fed ATM
89661-32580 89661-32581-84 90/91 Cal MTM
89661-32590 89661-32591-84 90/91 Cal ATM


Note: P/N suffix of -84 indicates that the ECU is a remanufactured unit. Some vehicles may already have a remanufactured ECU installed. However, the first 10 digits must be checked to determine if it is the most recent specification.


PARTS RETURN INFORMATION:

The replacement ECU's are remanufactured by Nippondenso-Los Angeles (NDLA). In order to maintain core availability for remanufactured units, the original ECU must be sent to NDLA as soon as it has been replaced.

Note: Please complete the core information and core credit forms which are enclosed with the remanufactured ECU.

Return cores to: Toyota Motor Distributors
C/O Nippondenso-Los Angeles
3900 Via Oro Avenue
Long Beach, CA 90810