Engine Control Module (ECM), replacing Volkswagen Passat B5 facelift

Engine Control Module (ECM), replacing

Work procedure

1. First, print out the old control module identification, and thus also its coding --> «Engine control module DTC memory, checking and erasing»(ref-255335-S36883171762007053000000) , DTC memory of Engine Control Module (ECM), checking and erasing.

Note. If the control module version that is appropriate for this vehicle is not indicated, replace the control module. For the current engine control unit part number: See parts catalog..

1. Switch off ignition.
2. Remove wiper arms and cowl --> «92 - WINDSHIELD WIPER AND WASHER SYSTEM»(ref-255357-S20879879362007053000000) .

Scheme 759

1. Remove cover of protective housing for control units.

Scheme 760

1. Carefully pry off the retainer bar with a screwdriver - arrow -.
2. Disengage connector from control module and then disconnect it.
3. Remove old control module and install the new control module.
4. The new control module must be coded, and the electronic anti-theft immobilizer and the throttle valve control module must be adapted. Activate the cruise control system if necessary --> «Adapting functions and components»(ref-255335-S15871651002007053000000)

1. Check DTC memory of new Engine Control Module (ECM) and erase if necessary --> «Engine control module DTC memory, checking and erasing»(ref-255335-S36883171762007053000000)
2. After erasing DTC memory, readiness code must be generated again --> «Adapting functions and components»(ref-255335-S15871651002007053000000)
3. Carry out test drive.

Observe safety precautions that apply to road tests --> Safety precautions .

1. Check control module DTC memory again.