Attention: When carrying out certain check procedures, additional fault codes may be issued. You need to be careful that the codes issued during checks do not mislead the checker. After completing the checks, all codes must be erased.
Reading with a voltmeter
Connect an analog voltmeter between pins A and B of the self-diagnosis plug (1).
Turn on the ignition.
If there is one or more fault codes in the memory of the electronic control unit, then the voltmeter needle will begin to fluctuate between high and lower values. If there are no codes, then the arrow will be stationary. The fluctuations of the arrow can be interpreted as follows:
- the first series of vibrations determines the number of tens, and the second series of vibrations determines the number of code units;
- the voltmeter needle will deviate more when issuing tens, when issuing units of the code, it will deviate for a shorter time. If there are no codes, the device will show regular on/off pulses
Count the number of vibrations in each series and write down each code as it appears. The meanings of the codes are indicated in the table at the end of the chapter
To complete the reading of trouble codes, turn off the ignition and disconnect the voltmeter.
Reading with LED probe
Connect the LED probe between pins A and B of the self-diagnosis plug.
A - grounding - contact A;
B - contact B of the self-diagnosis system;
C - LED;
1 - plug of the self-diagnosis system.
Turn on the ignition.
After about 3 seconds, the codes will begin to flash on the LED in the form of 2-digit flash codes as follows:
- two digits of the code are determined by two series of flashes;
- the first series of flashes determines the number of tens, and the second - the number of units of the code number;
- the number of tens is determined by 1.5-second flashes separated by 0.5-second pauses, the number of units is determined by 0.5-second flashes separated by 0.5-second pauses;
- A 2-second pause separates tens from ones;
- Code 42 is defined by four 1.5 second flashes followed by a 2 second pause followed by two 0.5 second flashes.
Count the number of flashes in each series and write down each code as it appears. The meaning of the codes is indicated in the table at the end of the chapter.
Codes will be issued sequentially in ascending order, and repeated after a 3-second pause
The issuance of eight on / off pulses with a duration of 0.5 seconds, repeated after a 3-second pause, means that the pins are more than creased.
Reading with the self-diagnosis warning lamp
Turn on the ignition.
Install jumper wire (WITH) between pins A and B of the self-diagnosis plug.
After about 3 seconds, the codes will begin to flash as 2-digit codes with the flashes of the self-diagnosis indicator lamp in the same way as with the flashes of a separate LED (see above).
To complete the reading of fault codes, turn off the ignition and remove the jumper wire.