Ignition Timing Control Inspection
Engine Tune-up Preparation1. Warm up the engine to the normal operating temperature.
2. Shift transaxle into Neutral (MTX) or P position (ATX).
3. Turn off all electrical loads.
^ Headlight
^ Blower
^ Rear window defroster
^ Power steering
4. Verify that the battery is fully charged.
5. Connect the SSTs (NGS tester) to the data link connector and select the "PID/DATA MONITOR AND RECORD" function and press TRIGGER.
6. Select "RPM" and press TRIGGER.
7. Wait until the electrical fan stops.
8. Select "START" to begin.
Ignition Timing Inspection
1. Perform "Engine Tune-up Preparation" above.
2. Verify that the idle speed is within the specification.
^ If not as specified, adjust the idle speed. Idle Speed
Specification
MTX: 550 - 850 (700 ± 150) rpm
ATX: 500 - 800 (650 ± 150) rpm
3. Connect a timing light to the high-tension lead of the No.1 cylinder.
4. Verify that the timing mark (yellow) is within the specification.
^ If not as specified, inspect the following.
a. Camshaft position sensor
b. Crankshaft position sensor
c. Throttle position sensor
d. Engine coolant temperature sensor
e. Neutral switch (MTX)
f. Clutch switch (MTX)
g. Transaxle range switch (ATX)
^ If the devices are normal, replace the PCM.
Specification
MTX: BTDC 6 - 18° (12° ± 6°)/550 - 850 rpm
ATX: BTDC 6 - 18° (12° ± 6°)/500 - 800 rpm