Component Inspection
Engine Control
P050B Cold Start Ignition Timing Performance - Inspection/Repair:_:Component Inspection
Component Inspection
TPS Inspection
1. Start engine and install scan tool.
2. Monitor the "TPS VOLTAGE1" and "TPS VOLTAGE2" parameters on the Scantool data list.
Specification :Refer to "Signal Waveform & Data" in the "General Information" procedure
- Output of TPS1 increases smoothly in proportion with the throttle valve opening angle.
- Output of TPS2 decreases smoothly in inverse proportion with the throttle valve opening angle.
3. Are the TPS VOLTAGE1&2 within the specification?
ETC Motor Inspection
1. Visually/physically inspect the restriction or any foreign objects in throttle body.
2. Clean or replace as necessary and go to "Verification of Vehicle Repair" procedure.
If OK, go to next step as below.
3. Ignition "OFF".
4. Disconnect the ETC motor harness connector.
5. Measure resistance between 'ETC output 1' terminal and 'ETC output 2' terminal of ETC motor harness connector. (Component side)
Specification :1.2 - 1.8Ohms at 20°C(68°F)
6. Is resistance within specification?
NOTE:
It is necessary to perform the TPS adaptation procedure after the ETC assembly or PCM replacing.
TPS adaptation procedure
Ignition "OFF" and then "ON" without cranking. Wait for 10 seconds under enable conditions.
-> Enable conditions : Battery >10V & Intake Air Temp. >5.3°C(41.5°F) & 5.3°C(41.5°F)
Check resistance of OCV
1. Ignition "OFF".
2. Disconnect intake OCV connector.
3. Measure resistance between power and control terminals of OCV. (Component Side)
Specification :Approx. 6.9 - 7.9Ohms at 20°C(68°F)
4. Is resistance within the specification?
Check operation of OCV
1. Start the engine and let it idle.
2. With OCV connector still disconnected, apply 12V to power terminal and connect ground to control terminal of the OCV(Component side).
Specification :
3. Has a problem been found?
Check OCV and Filter
1. Ignition"OFF".
2. Check OCV filter for sticking or contamination.
3. Remove the OCV and visually check the spool column of OCV for contamination.
4. Has a problem been found?
5. Apply 12V to power terminal and connect ground to control terminal of the OCV(Component side).
6. Verify that a "clicking" sound is heard when applying the battery voltage.
7. Repeat this procedure 4 or 5 times to ensure intake OCV reliability.
8. Is OCV working properly?
Check CVVT(Continuously Variable Valve Timing) Assembly
1. Remove the CVVT assembly. Refer to "Removal Procedure" in Workshop Manual.
2. Check that the CVVT assembly is locked.
3. The one of the 2 holes on the cam journal is for advances(upper) and the rest is for retards(lower). Apply masking tape to all oil path holes except the one advance hole("B") indicated by the arrow as shown in the figure.
4. To release the CVVT lock pin, wrap some tape around the tip of an air pressure adapter and apply low air pressure of approx. 150kPa(1.5kg/cm2, 21 psi) to the exposed camshaft port. Wrap a shop towel or rag around the CVVT because residual oil may leak out of the unit when applying air pressure.
5. With low air pressure applied, turn the CVVT to the ADVANCE direction as indicated in the figure.
NOTE:
If too much air leaks when applying the low air pressure, the CVVT lock pin may not release and the CVVT may not turn.
6. Allow the CVVT assembly to move in the ADVANCE and DELAY directions to ensure there is no binding and that it moves freely.(Movable smoothly in the range about 20°)
7. Turn the CVVT by hand and make sure it locks in the maximum delay angle position.
8. Is CVVT assembly working properly?
