Engine Controls - Basic Diagnostic Procedures: Summary

If no faults were found while performing BASIC DIAGNOSTIC PROCEDURES, proceed to appropriate TESTS W/CODES article in this section. See list below. If no hard codes are found in self-diagnostics, proceed to TESTS W/O CODES article in this section for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.

• 850 Non-Turbo, see: TESTS W/CODES - NON-TURBO
• 850 Turbo, see: TESTS W/CODES - TURBO
• 940, see: TESTS W/CODES - LH 2.4/EZK 116 IGNITION
• 960, see: TESTS W/CODES