1. Start checking
1. Check for entries in the service log for recent repairs that could indicate a related malfunction, and if the scheduled maintenance is due.
2. Open the hood and check the following:
- are the wiring connectors tightly connected;
- whether the wiring harnesses are correctly laid, not pinched or cut;
- are the vacuum hoses tightly connected, are they pinched, are there any cracks;
- whether there are leaks from hoses and tubes;
- Is the air cleaner clogged?
- gasket.
3. Make sure that electrical consumers are switched off and there are no mechanical loads.
- headlights off;
- the air conditioner is off;
- rear window heater off;
- the steering wheel is in a straight-line position, etc.,
4. Start the engine and warm it up until the needle of the engine coolant temperature gauge deviates to the middle of the scale.
Make sure the engine speed is below 1000 rpm.
5 Run the engine at about 2000 rpm for about 2 minutes without load.
6. Using the CONSULT-II tester or GST scanner, verify that no DTCs are displayed.
Normal or Abnormal
Normal - Go to step 3
Abnormal - Go to step 2
2. Repair or replace
Repair or replace components according to the appropriate «Diagnostic procedure». Go to step 3.
3. Check the given rpm.
1. Let the engine run at about 2000 rpm for about 2 minutes without load.
2. Increase engine speed two or three times (from 2000 to 3000 rpm) without load, then run the engine for 1 minute at rpm x x.
3. Check the speed x.x, 650±50 rpm (pregnant «N»).
Normal or Abnormal
Normal - END OF CHECK
Abnormal - Go to step 4
4. Learn the released position of the accelerator pedal
1. Stop the engine.
2. Learn the released position of the accelerator pedal. t Go to step 5.
5. Teach closed throttle position
Perform throttle closed position learning. Go to step 6.
6. Carry out air supply training at idle speed.
See section «Learning to supply air at speed x.x.»
Learning to supply air at speed x.x. carried out successfully?
Yes or no
Yes - Go to step 7.
No -
- 1. Follow the instructions in the section «Learning to supply air at speed x.x»
- 2. Go to step 4.
7. Again check the set speed x.x.
1. Start the engine and warm it up to normal operating temperature.
2. Check rpm x. X.
650±50 rpm (pregnant «N»)
Normal or Abnormal
Normal - END OF CHECK
Abnormal - Go to step 8.
8. Identify the failed component
Check the following:
- Camshaft Angle Sensor (PHASE) and chain.
- crank angle sensor (POS) and chain.
Normal or Abnormal
Normal - Go to step 9.
Abnormal -
- 1. Repair or replace.
- 2. Go to step 4.
9. Check the operation of the ECM
1. To test the operation of the ECM, substitute a known-good ECM (The ECM may be the cause of the malfunction, although this is unlikely).
2. Initialize the NATS system and register the ID codes of all NATS ignition keys. Go to step 4.