Computers and Control Systems: Adjustments

NOTE: CANADA vehicles, pull the parking brake lever up. Start the engine, then check that the headlights are off.



1. Start the engine and let it warm up to operating temperature (the cooling fan comes on).
2. Connect a tachometer.

EACV Connector:

3. Disconnect the 2P connector from the EACV.
4. Check the idle speed in the no load condition in which the headlights, blower fan, rear defogger, cooling fan, and air conditioner are off. Idle speed should be:

M/T: 550 +/- 50 rpm
A/T: 550 +/- 50 rpm (neutral or park)

Idle Adjustment:

5. Adjust the idle speed by turning the idle adjusting screw.
Turn the ignition switch off.
6. Reconnect the 2P connector on the EACV, then remove the "BACK UP" fuse, in the main fuse box, for 10 seconds to reset the ECU.
7. Restart and idle the engine in the no load conditions in which the head lights, blower fan, rear defogger, cooling fan, and air conditioner are not operating for one minute, then check the idle speed. Idle speed should be:

M/T: 700 +/- 50 rpm
A/T: 700 +/- 50 rpm (in gear)

8. Idle the engine for one minute with the headlights on high beam and check the idle speed. Idle speed should be:

M/T: 770 +/- 50 rpm
A/T: 770 +/- 50 rpm (in gear)

9. Turn the headlights off, idle the engine for one minute with the heater fan on high speed and the air conditioner on. Idle speed should be:

M/T: 770 +/- 50 rpm
A/T: 770 +/- 50 rpm (in gear)

10. If idle speed is out of specifications, see COMPUTERIZED ENGINE CONTROLS for testing of idle control system.
Disconnect the tachometer.