Trouble Diagnoses — Self-diagnosis Mode III
EF & EC-68prose procedureSelf-diagnosis — Mode III
The E.C.U. constantly monitors the function of these sensors and actuators, regardless of ignition key position. If a malfunction occurs, the information is stored in the E.C.U. and can be retrieve from the memory by turning on the diagnostic mode selector, located on the side of the E.C.U. When activated, the malfunction is indicated by flashing a red and a green L.E.D. (Light Emitting Diode), also located on the E.C.U. Since all the self-diagnostic results are stored in the E.C.U.'s memory even intermittent malfunctions can be diagnosed.
A malfunctioning part's group is indicated by the number of both the red and the green L.E.D.s flashing. First, the red L.E.D. flashes and the green flashes follow. The red L.E.D. refers to the number of tens while the green one refers to the number of units. For example, when the red L.E.D. flashes once and then the green one flashes twice, this means the number "12" showing the air flow meter signal is malfunctioning. In this way, all the problems are classified by the code numbers.
IMPORTANT
When engine fails to start, crank engine more than two seconds before starting self-diagnosis.
IMPORTANT
Before starting self-diagnosis, do not erase stored memory. If doing so, self-diagnosis function for intermittent malfunctions would be lost.
The stored memory would be lost if:
1. Battery terminal is disconnected.
2. After selecting Mode III, Mode IV is selected.
DISPLAY CODE TABLE
Display Code Table
| Code No. | Detected items |
|---|---|
| 11 | Crank angle sensor circuit |
| 12 | Air flow meter circuit |
| 13 | Engine temperature sensor circuit |
| 21 | Ignition signal circuit |
| 34 | Detonation sensor circuit |
| 43 | Throttle sensor circuit |
| 55 | No malfunctioning in the above circuit |
11
Detected itemsCrank angle sensor circuit
12
Detected itemsAir flow meter circuit
13
Detected itemsEngine temperature sensor circuit
21
Detected itemsIgnition signal circuit
34
Detected itemsDetonation sensor circuit
43
Detected itemsThrottle sensor circuit
55
Detected itemsNo malfunctioning in the above circuit