Removal & Installation (A4 & S4)
- Connect VAS 5051 or equivalent scan tool to Data Link Connector (DLC). DLC is located behind cover under left side of steering column. Turn ignition on. On scan tool, select vehicle system 01 - ENGINE ELECTRONICS. From selection 1, select diagnostic function 07 - CODE CONTROL MODULE. Press "Q" button to confirm input. Following scan tool instructions, access ECM coding information. Scan tool should display ECM identification and coding information. Using scan tool, print out ECM coding information. Compare coding of ECM with coding versions. See CODING ENGINE CONTROL MODULE . Turn ignition off, and go to next step.
- Remove rubber seal from plenum chamber by pulling seal towards front of vehicle. ECM is located in left rear corner of engine compartment, inside electronics box. See Fig 1. Remove screws from heater core E-box cover. Using a flat-blade tool, carefully pry off retaining bracket. Disengage locking lugs and remove ECM harness connector. To install, reverse removal procedure.
- After installing 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. See ADAPTATION OF KICKDOWN FUNCTION 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 in appropriate SELF-DIAGNOSTICS article.
Courtesy of AUDI OF AMERICA, INC.