Idle Speed/Ignition Timing/Idle Mixture Ratio Inspection
EF & EC-25flowchartPREPARATION
NOTE
1. Make sure that the following parts are in good order.
- Battery
- Ignition system
- Engine oil and coolant levels
- Fuses
- E.C.U. harness connector
- Vacuum hoses
- Air intake system (including P.C.V., hoses, oil filler cap and oil level gauge, etc.)
- Fuel pressure
- Engine compression
- Throttle valve
2. On air conditioner equipped models, checks should be carried out while the air conditioner is "OFF".
3. On N.CVT equipped models, when checking idle rpm, ignition timing and mixture ratio, checks should be carried out while shift lever is in "N" position.
4. When measuring "CO" percentage, insert probe more than 40 cm (15.7 in) into tail pipe.
5. Turn off headlamps, heater blower, rear defogger.
6. Keep front wheels pointed straight ahead.
7. Make the check after the radiator fan has stopped.
8. Ensure the latest version of the CONSULT software has been loaded into the CONSULT unit and is suitable for use on the vehicle being tested. Ensure the CONSULT connnection lead is properly connected and is in good order.
Overall inspection sequence
1
INSPECTION START
2
Perform self-diagnosis
N.G.
Repair or replace
O.K.
3
Check & adjust idle speed
O.K.
4
Check ignition timing
N.G.
Adjust ignition timing
Adjust ignition timing
Check & adjust idle speed
O.K.
5
Check exhaust gas sensor function
O.K.
return to step 8
N.G.
6
Check exhaust gas sensor power and signal levels
N.G.
Check exhaust gas sensor harness
O.K.
7
Check CO%.
N.G.
8
Check emission control parts and repair or replace if necessary.
9
INSPECTION END
