ECU - Erratic/Uneven Acceleration, Rough Idle: Overview

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TSB # 082887
August 28, 1987


TO: ALL RENAULT DEALERS
SUBJECT: 1988 MEDALLION ELECTRONIC CONTROL UNIT RETROFIT PROGRAM FOR AUTOMATIC TRANSMISSION EQUIPPED VEHICLES


A program has been developed to replace the factory installed ECU P/N 7700 736 396 on automatic transmission equipped Medallions.

As you know, the 1988 Medallion has been subject to some driveability characteristics that generally can be traced to the ECU. At this time ECU availability is limited, therefore we will conduct the second phase of this program as follows:

^ First Phase - Retail Customer (In Progress)

As of August 21, 1987 slightly over 6,000 of the subject vehicles have been sold to retail customers. Approximately 3,900 of the updated ECU's have been shipped to dealers. This quantity of ECU's should be sufficient to satisfy customers with driveability concerns.

For all future orders, related to retail customers, refer to the Medallion Electronic Control Unit (ECU) Usage Chart (see attachment).

^ Second Phase - Vehicles Sold from Dealer Stock

The second phase is to install updated ECU's on vehicles sold from dealer stock, prior to delivery. See the Medallion Electronic Control Unit (ECU) Usage Chart attached.

Note: All vehicles ordered by dealers on or after July 27, 1987 are already equipped with updated ECU's.

To begin this program all dealers are instructed to use updated ECU's presently in their inventory before ordering additional ECU's.

If you do not have updated ECU's in your inventory, we request that as a guideline when ordering additional ECU's, you order no more than the quantity equal to the number of Medallion models with automatic transmissions sold in the last two weeks. This procedure is being implemented to prevent undue depletion of our limited supply of ECU's.

All stock orders for ECU's currently on file with your PDC will be cancelled. Dealers will have to periodically reevaluate their requirements and reorder according to the new guidelines until our supply improves.