Engine Controls - Basic Testing - Turbo: Summary

If no faults were found while performing BASIC DIAGNOSTIC PROCEDURES, proceed to appropriate TESTS W/CODES - TURBO article:

• For T-5, see TESTS W/CODES - MOTRONIC 4.3 - TURBO .
• For GLT, see TESTS W/CODES - MOTRONIC 4.4 - TURBO .

If no hard codes are found in self-diagnostics, proceed to TESTS W/O CODES article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.