Engine Control Module (ECM), replacing
Work procedure
- First, print out the old control module identification, and thus also its coding → Engine control module DTC memory, checking and erasing , 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..
- Switch off ignition.
- Remove wiper arms and cowl → 92 - WINDSHIELD WIPER AND WASHER SYSTEM .
- Remove cover of protective housing for control units.
- Carefully pry off the retainer bar with a screwdriver - arrow -.
- Disengage connector from control module and then disconnect it.
- Remove old control module and install the new control module.
- 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
- Check DTC memory of new Engine Control Module (ECM) and erase if necessary → Engine control module DTC memory, checking and erasing
- After erasing DTC memory, readiness code must be generated again → Adapting functions and components
- Carry out test drive.
Observe safety precautions that apply to road tests → Safety precautions .
- Check control module DTC memory again.