- A) Playback (imitation) driving modes in which this diagnostic code is detected.
- b) Verify the correctness of the performed repairs, making sure that after performing them, this diagnostic code does not appear.
Code #21 - Oxygen sensor
Malfunction - damage to the oxygen sensor
Test modes (numbers in circles in the figure):
Code number 21.
1 - vehicle speed.
2 - fixing a malfunction.
3 - the ignition switch is off,
4 - idle mode,
5 - time.
1. With the ignition off, disconnect the EFI fuse (15A) for 10 seconds or more. Put the system into test mode by jumpering the contacts "TE2" And "E1" diagnostic connector with the ignition off.
2. With all accessories off, start the engine and warm it up to normal operating temperature.
3. Let the engine idle for at least 3 minutes.
4. Start driving, gradually increase the engine speed to 1300-1700 rpm, and then hold it at about 1500 rpm with the air conditioner on and in the position "D" the automatic transmission selector or in 5th gear of the manual transmission. Try not to drop below 1200 rpm when changing gears. Gradually depress the accelerator pedal and hold it in this position to prevent engine braking.
5. Set the vehicle speed within 64-80 km/h.
6. Maintain this mode for 2-3 minutes.
Note:
- If a malfunction exists, then the light panel "CHECK ENGINE" lights up approximately 60 seconds after acceleration starts.
- The fault will not be fixed if the test procedure is not followed exactly.
Code No. 25 - Poor air-fuel mixture
Note: Before performing this test, ensure that power is available to the oxygen sensor heater. Test modes (numbers in circles in the figure):
Code number 25.
1 - engine crankshaft speed,
2 - fixing a malfunction,
3 - turning on the ignition switch,
4 - idle mode,
5 - time.
1. With the ignition off, disconnect the EFI fuse (15 A) for 10 seconds or more. Put the system into test mode by jumpering the contacts "TE2" And "E1" diagnostic connector with the ignition off.
2. Start the engine and warm it up to normal operating temperature.
3. Let the engine idle for about 3 minutes.
4. Quickly increase the engine speed to 4000 rpm by depressing the accelerator pedal. Repeat this three times.
5. Let the engine run at 2000 rpm for about 90 seconds.
Note: if there is a fault, the indicator light will flash on the 4th test step.