Engine Control Module Programming (All Models): Notes

NOTE: Once procedure is started DO NOT turn ignition off during ECM programming. After coding ECM and starting engine for first time, allow engine to idle for several minutes so ECM can go through learn function. Idle speed may be erratic while ECM is learning.

If Engine Control Module (ECM) is replaced, it is necessary to code new ECM. If new ECM is not properly coded, the following problems may occur:

Driveability problems (e.g., harsh shifting).
False malfunctions stored in ECM memory.
Increased fuel consumption.
Increased exhaust emissions.
Reduction in transmission life.
All ECM functions are not carried out (e.g., EVAP system operation).
On front wheel drive vehicles Anti-Slip Regulation (ASR), (ASR warning lamp comes on).

Before ECM is replaced on any model perform following procedure. Turn ignition off. Connect Scan Tool (VAG 1551/1552) using Adapter cable (VAG 1551/3) to Data Link Connector (DLC). Turn ignition on. Prior to removing original ECM, print out ECM identification. On scan tool, press 0 and 1 buttons to select ADDRESS WORD 01: ENGINE ELECTRONICS. Print out ECM identification by pressing PRINT button. Press right arrow button. On scan tool, press 0 and 6 buttons to select FUNCTION 06: END OUTPUT. Press "Q" button to enter input. Turn ignition off.

Remove original ECM and install new ECM. Turn ignition on. On scan tool, press 0 and 1 buttons to select ADDRESS WORD 01: ENGINE ELECTRONICS. Press right arrow button. Press 0 and 7 buttons to select FUNCTION 07: CODE CONTROL MODULE. Press "Q" button to enter input. Enter appropriate code for vehicle. See appropriate ENGINE CONTROL MODULE CODING TABLE or VARIATION TABLE as follows. After coding ECM, press 0 and 6 buttons to select FUNCTION 06: END OUTPUT. Press "Q" button to enter input.

After installing and/or coding ECM perform following procedures:

Use scan tool to check DTC memory, erase if necessary. See RETRIEVING DIAGNOSTIC TROUBLE CODES in appropriate SELF-DIAGNOSTICS article.
Perform adaptation of throttle valve control module. See ADAPTATION OF THROTTLE VALVE CONTROL MODULE in appropriate SELF-DIAGNOSTICS article.
On vehicles equipped with cruise control, activate cruise control to ECM. See CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT.
On vehicles equipped with automatic transmission, perform adaptation of kickdown switch or automatic transmission basic setting. See ADAPTATION OF KICKDOWN FUNCTION or AUTOMATIC TRANSMISSION BASIC SETTING PROCEDURE in appropriate SELF-DIAGNOSTICS article.
On vehicles equipped with factory alarm system, perform adaptation of immobilizer to ECM. See appropriate ANTI-THEFT & POWER DOOR LOCKS article in ACCESSORIES & EQUIPMENT.
Using scan tool, generate a ECM readiness code. See READINESS CODE .