Ignition Timing: Testing and Inspection
Ignition Timing Inspection1. Check the idle speed, and adjust it if necessary.
2. Pull out the service check connector 2P (GRN/BLK and RED/WHT wires) from the connector holder under the dash on the front passenger side, then connect the SCS service connector (T/N 07PAZ - 0010100) to it.
3. Start the engine. Hold the engine speed at 3,000 rpm with no load (A/T in (P) or (N) position, M/T in neutral) until the radiator fan comes on, then let it idle.
4. Connect a timing light to the No.1 ignition wire. Remove the rubber plug from the "window" in the flywheel/drive plate housing. While the engine idles, point the timing light toward the pointer on the flywheel (M/T) or drive plate (A/T).
5. Check the ignition timing in no load conditions:
headlights, blower fan, rear defogger, and air conditioner are not operating.
Ignition Timing
6. If the ignition timing is incorrect, replace the ECM (there is no way to adjust ignition timing).
7. Disconnect the special tool from the service check connector.