General information
1. The self-diagnosis function is built into the automatic transmission electronic control unit. With the help of the overdrive off indicator, the system can warn the driver of a malfunction in the automatic transmission. The fault code that has occurred can be determined using the same indicator.
A) Fault codes can be read by the number of indicator blinks "D4", for this it is necessary to short the conclusions "ECUT" And "E".
2. The fault code is stored in the memory of the control unit even after the engine is turned off. Clearing the memory of the control unit (reset codes after repair) is done by turning off the ignition and disconnecting the connector of the automatic transmission control unit and the engine for at least 10 seconds.
Caution: Low battery voltage may cause diagnostic failure. Therefore, before starting the diagnosis, check the battery.
Reading fault codes
1. Turn on the ignition and set the overdrive switch to "ON".
Attention: do not start the engine.
2. Short the leads "ECUT" And "E" diagnostic socket.
Attention: do not make a mistake in shorting the connector.
3. Read and determine the fault code by the number of blinks of the indicator.
A) If there are two flashes per second, then the system is working normally.
b) In the event of a malfunction, after 4 seconds the indicator will flash. Count the number of flashes.
The fault code consists of two digits: the first digit is determined by the initial series of flashes, then after a pause of 1.5 seconds, a second series of flashes follows, which corresponds to the second digit of the code (see table "Fault codes").
If there are two or more fault codes, the smallest code will be displayed first, and then the remaining codes in ascending order. There will be a 2.5 second pause between codes.
Table. Fault codes.