Civic Wagon 4WD L4-1590cc 1.6L SOHC (D16A6) MFI (1989)
7.
Alternator Control
The system control the voltage generated by the alternator in accordance with the electric load and drive mode, and reduces the engine load to
improve the fuel economy.
8.
Fast Idle Control Solenoid Valve
When the coolant temperature is extremely low, the ECU supplies ground to the fast idle control solenoid valve which supplies additional
bypassed air.
ECU Back-Up Functions
1.
Fail-Safe Function
When an abnormality occurs in a signal from a sensor, the ECU ignores that signal and assumes a pre-programmed value that allows the engine
to continue to run.
2.
Back-Up Function
When an abnormality occurs in the ECU itself, the injectors are controlled by a back-up circuit independent of the system in order to permit
minimal driving.
3.
Self-diagnosis Function (CHECK ENGINE warning light, LED indicator)
When an abnormality occurs is the signal from a sensor, the ECU lights the CHECK ENGINE warning light, stores the failure code in eraseable
memory and indicates the code with the LED on the ECU anytime the ignition is on. When the ignition is initially turned on, the ECU supplies
ground for the check engine warning light for 2 seconds.