Entering Self-Diagnostics: Notes

Turbo control unit has fault tracing capability. It offers 2 different control functions (No. 1 and 3): one for retrieving fault codes and another for testing new components. Diagnostic unit, used for code retrieval and new component testing, is located behind left front shock tower.

Diagnostic unit socket No. 5 is used for self-diagnostic function. Once selector cable has been inserted in correct slot, depressing button once or twice selects from one of 2 control (fault tracing) functions. Faults stored in either ECU memory are read by means of a system of LED flashes.

Diagnostic system for turbo ECU stores 8 different fault codes. All fault codes have 3 digits. Each can range from 1-to-4. Example of 3-digit code: 4-1-3. Since all codes have 3 digits, each code requires 3 series of flashes. For easier reading, 3-second intervals separate digits of code.