* Warm up the engine and see that the Temperature Gauge is in it’s usual position. + = Check items causing a malfunction of the crank angle sensor 1st, if both #11 and #21 are displayed at the same time. ON = The ECU’s CPU or the Crank Angle sensor is malfunctioning.ĥ4 Signal circuit from A/T control unit to ECU (A/T only)Į = Check Engine light will show this code.
Mode I (Engine ON) – Malfunction Warning: in the ECU and the Check Engine Light stay ON. See the FAQ on this same page that was written by Richard Lestage for the SOHC ECU!ĪLL TESTS ARE PERFORMED W/ THE IGNITION SWITCH “ON” and a GREEN L.E.D., you’ve got a different ECU than is described here. Note: If you find that your looking at a RED L.E.D. flashes once and after a short pause flashes twice, this signifies the number “12”. The Malfunction Codes are indicated by the number of flashes by the RED L.E.D.
KA24DE ECU TUNING CODE
If the same conditions are present, the Malfunction Code will be stored again for 50 cranks of the starter. Malfunction Codes are stored by the ECU for 50 times of cranking the starter. When you start the engine, any current malfunction codes will be store by the ECU until you erase them or they get dumped. This is assuming that you didn’t start the car between changing modes. Note: Doing this will ERASE any Malfunction Codes that are stored in the ECU for Mode II.Įxample: If you found a Malfunction Code of 34 when you very first switched to Mode II and then cycled back to Mode I, then again to Mode II, you’ll get a 55 (everything’s OK) code. * Return to Mode I by turning the Mode Selector fully CLOCKWISE again, holding for another 2-seconds and turning it back to the original position. Turn the ECU Mode Selector fully CLOCKWISE, hold for at least 2-seconds and then return the Mode Selector to it’s original position. Note: Switching Modes is not possible when the engine is running. When the ECU is changed from Mode II back to Mode I by using the Mode Selector, the malfunction code(s) stored for Mode II will be erased. Note: The ECU will automatically return to Mode I when the ignition is switched OFF. Mode II (Engine ON)- Exhaust Gas Sensor Monitor Mode II (Engine OFF)- Stored Self Diagnostic Results There are 2- Modes and 2- Conditions for the Engine to be in for running diagnostics:Īll Modes are with the Ignition Switch in the ON position The codes are automatically erased from memory when the starter is operated fifty times after the trouble is last noticed. For example, when the red lamp flashes once and the green lamp flashs twice, this signifies the number “12”.Ģ1 Ignition signal missing in primary coilĪfter the diagnostic, Turn the ignition ‘off’ to return to mode I.
The red lamp correspond to units of ten and the green lamp to units of one. First the red lamp flashes and then the green one. The codes are indicated by the number of both red and green lamps. – You are now in self diagnostic mode III. – Turn the screw back after the lamp has flashed 3 times. The unit will continually cycle through the five modes until the screw is turn back. The inspection lamps will flash 3 times, the unit will be in mode III. The inspection lamps will flash twice, the unit will be in mode II. The inspection lamps will flash once, the unit will be in mode I. – Turn the ECU adjusting screw fully clockwise. The stored codes will be lost if the car battery is disconnected or if after selecting mode III, mode IV is selected. The unit automatically return to normal mode I when the ignition is switched off. Mode II- Mixture ratio feedback control monitor Mode I- Exhaust gas sensor monitor (Normal mode) The electronic control unit have five mode:
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