EGR Valve: Testing and Inspection

1. REMOVE V-BANK COVER.

2. DISCONNECT EGR VALVE CONNECTOR.





3. INSPECT EGR VALVE RESISTANCE.
- Using an ohmmeter, measure the resistance between terminal B1 and B2 and other terminals (S1, S2, S3 and S4).

Resistance:
At 20°C (68°F): 19.9 - 23.4 0hms

4. DRAIN ENGINE COOLANT.

5. REMOVE EGR VALVE.
- Disconnect these hoses from EGR valve:





- Water bypass hose from IAC valve
- Water bypass hose from rear water bypass joint
- Remove the 2 nuts, EGR valve and gasket.





6. INSPECT EGR VALVE.
- Visually inspect EGR valve
- Check for sticking and heavy carbon deposits.
- If a problem is found, replace the EGR valve assembly.





- Inspect EGR valve operation
- Apply battery voltage to terminal B1 and B2, and while repeatedly grounding (*S4) - (S4 and S3) - (S3 and *S2) - (S2 and *S1) - (S1 and S4) in sequence, check that the valve moves toward the open position.

HINT: Keep the terminal marked with an asterisk (*) grounded while proceeding to the next grounding.






- Apply battery voltage to terminal B1 and B2, and while repeatedly grounding (*S1) - (S1 and *S2) - (S2 and *S3) - (S3 and *S4) - (S4 and S1) in sequence, check that the valve moves toward the closed position.

HINT:
- Keep the terminal marked with an asterisk (*) grounded while proceeding to the next grounding.

- If operation is not as specified. replace the EGR valve assembly.





7. REINSTALL EGR VALVE.
- Place a new gasket on the EGR valve adaptor.

NOTICE:
- Do not touch the adaptor and EGR valve surfaces of the gasket with your hand.
- Align the port holes of the gasket and adaptor. Be careful of the installation direction.

- Install the EGR valve with the 2 nuts.

Torque: 18 N.m (185 kgf.cm. 13 ft.lb.)

- Connect these hoses to the EGR valve:
- Water bypass hose from IAC valve
- Water bypass hose from rear water bypass joint

8. RECONNECT EGR VALVE CONNECTOR.

9. REINSTALL V-BANK COVER.

10. REFILL WITH ENGINE COOLANT.