TROUBLE SHOOTING
SELF-DIAGNOSTIC SYSTEM
The EEC system incorporates a self-diagnostic function that indicates system faults through a series of trouble codes. The presence of fault(s) is indicated by flashing A/C OFF button. The control panel is programmed to enter a pre-programmed mode when a fault is detected. Under fault condition, control panel ignores the faulty signal, selects an alternative pre-programmed value and prevents delivery of faulty output signals.
Entering Self-Diagnostics
1.To enter mode, ensure engine is running. Shine a non-
fluorescent, bright light on solar sensor. Place blower fan control knob in AUT position and function selector knob in vent position.
2.Place temperature control knob to maximum cooling (pointing straight down). Ensure recirculated air switch is depressed and A/C OFF button is released. Depress and release A/C OFF button within 5 seconds to start self-diagnostic mode.
3.Each fault code consists of 3 digits. For example, Code
132 is displayed by a single flash of the A/C OFF button for the first digit (number 1). After a pause, the second digit of code (number 3) is indicated by 3 flashes. After another pause, the third digit of code (number 2) is indicated by 2 flashes. See TROUBLE CODE IDENTIFICATION table.
4.Three different fault codes may be stored in memory. However, only one code may be displayed upon request. It may be necessary to request display of fault codes a number of times to ensure all fault codes are displayed.
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