Diesel Data: Automotive Repair

Component Inspection

INSPECTION





Note: The EVAP Canister Purge Solenoid Valve is controlled by the ECM; when the engine coolant temperature is low, and also during idling the valve closes so that evaporited fuel is not drawn into the surge tank. After engine warm-up during ordinary driving, it opens to let the stored vapors flow into the surge tank.


NOTE: When disconnecting the vacuum hose, make an identification mark on it so that it can be reconnected to its original position.

1. Disconnect the vacuum hose (black with red stripe) from the solenoid valve.
2. Detach the harness connector.
3. Connect a vacuum pump to the nipple to which the red-striped vacuum hose was connected.








4. Apply vacuum and check when voltage is applied to the EVAP Canister Purge Solenoid Valve and when the voltage is discontinued.




5. Measure the current between the terminals of the solenoid valve.

EVAP Canister Purge Solenoid Valve:
Coil at 20 °C (68 °F): 0.45 A or below (at 12 V)
Coil resistance: 26 Ohm [at 20 °C (88 °F)]





CHECK OF CANISTER CLOSE VALVE OPERATING
1. Connect the CCV pins to a wire as shown.
2. At idle, disconnect the CCV connector.
3. Inspect that CCV is close when attaching the wire to (-) of battery.
4. Inspect that CCV is open when detaching the wire from (-) of battery.






NOTE: In this case, if you use a very thin paper and attach ft to hose to CCV, you can check easy the CCV condition.

1. It the paper is absorbed into or out, CCV is open.
2. If not, CCV is close.