Fuel Injection, Ignition & Turbo Systems
Fuel injection, ignition and turbo systems each feature a self-diagnostic function for fault tracing. A common diagnostic unit, located in engine compartment behind left strut assembly, is used to retrieve codes from each control unit. Diagnostic unit is equipped with an LED indicator, activation button and function select cable. See Fig 1.
Diagnostic unit output socket No. 2 is used for fuel injection. Socket No. 6 is used for ignition system. Socket No. 5 is used for turbo system. Once selector cable has been inserted in correct slot, depressing button once, twice or 3 times selects from one of 3 control (fault tracing) functions. Faults stored in either ECU memory are read by means of a system of LED flashes.
Diagnostic system for fuel injection ECU stores 17 different fault codes. Ignition ECU stores 9 fault codes. 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, a 3-second interval separates each digit of the code.