Ignition Timing Control System

Inspection
1. Connect a timing light to the engine.
2. Crank the engine.







3. Verify that the timing mark (yellow) on the crankshaft pulley and the mark on the timing belt cover are aligned.

Specification: BTDC 6-8°

4. If not as specified, loosen the lock bolt and adjust by turning the distributor.
5. If adjustment by turning distributor is not possible, check the following.
^ PCM terminal voltage
IGT control signal and related wiring harnesses and connectors.
^ Camshaft position sensor
^ Ignition control module and related wiring harnesses and connectors.
6. Warm up the engine to normal operation temperature.
7. Verify that the ignition timing is correct.
8. Increase the engine speed and verify that the ignition timing advances accordingly.
9. If not, check the following.
^ Mass air flow sensor