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 Ohms
4. DRAIN ENGINE COOLANT
5. REMOVE EGR VALVE ASSEMBLY
(a) Disconnect these hoses from EGR valve:
- Water bypass hose from AC valve
- Water bypass hose from rear water bypass joint
(b) Remove the 2 nuts, the EGR valve assembly and gasket.
6. INSPECT EGR VALVE
A. Visually inspect EGR valve
Check for sticking and heavy carbon deposits.
If a problem is found, replace the EGR valve assembly.
B. Inspect EGR valve operation
(a) 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.
(b) 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.
- Do this operation after opening the valve by performing step (a) above.
If operation is not as specified, replace the EGR valve assembly.
7. REINSTALL EGR VALVE ASSEMBLY
(a) 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.
(b) Install the EGR valve assembly with the 2 nuts.
Torque: 18 N.m (185 kgf.cm, 13 ft.lbf)
(c) 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