Tune-up and Engine Performance Checks: Testing and Inspection

ENGINE TUNE-UP [LF]

Engine Tune-up Preparation
1. Verify the following:
^ AT: Selector lever is in P or N position.
^ MT: Shift lever is in neutral position.

2. Verify that no DTCs are available.
3. Warm up the engine (ECT is approx. 80°C (176°F) or more) as follows.
1) Start the engine.
2) Racing at the engine speed 2,500-3,000 rpm for 3 min.
4. Turn off the electrical loads.
5. Wait until the cooling fans stop.





6. Connect the SST (M-MDS) to the DLC-2.
7. Verify that the idling speed (M-MDS: RPM PID) is within the specification using the M-MDS function.
Standard
AT: 700-800 rpm
MT: 670-770 rpm

Ignition Timing Inspection

Note
^ Ignition timing is not adjustable.
^ Ignition timing verification requires M-MDS.

1. Verify that the ignition timing (M-MDS: SPARKADV PID) is within the specification using M-MDS.
Ignition timing Approx. BTDC 8°
2. Verify that ignition timing advances when the engine speed increases gradually.
^ If there is malfunction, refer to "ENGINE SYMPTOM TROUBLESHOOTING". (See SYMPTOM DIAGNOSTIC INDEX [LF]. In Engine)

Idle Speed Inspection

Note
^ Idle speed is not adjustable.
^ Idle speed verification requires M-MDS.

1. Verify that the idle speed (M-MDS: RPM PID) is within the specification using M-MDS.
^ If there is malfunction, refer to "ENGINE SYMPTOM TROUBLESHOOTING". (See SYMPTOM DIAGNOSTIC INDEX [LF] In Engine.)

Idle speed
No load: 670-770 rpm (MT), 700-800 rpm (AT)
Electrical loads (38-48 A): 700-800 rpm
Electrical loads (more than 48 A): 800-900 rpm
P/S ON: 700-800 rpm (MT), 750-850 rpm (AT)
A/C ON: 825-925 rpm (MT), 775-875 rpm (AT)

Idle Mixture Inspection
1. Verify that the idle speed and ignition timing are within the specification. (See ENGINE TUNE-UP [LF] In Maintenance.)
2. Insert an exhaust gas analyzer to the tailpipe.
3. Verify that the CO and HC concentrations are within the regulation.
^ If there is malfunction, refer to "ENGINE SYMPTOM TROUBLESHOOTING". (See SYMPTOM DIAGNOSTIC INDEX [LF] In Engine.)

Idle mixture
HC concentration: Within the regulation
CO concentration: Within the regulation