EGR VALVE INSPECTION [LF, L3]

Operation Test

1. Carry out the "EGR Control Inspection". (See EGR Control System Inspection (Unleaded Fuel Models).

• If not as specified, perform the further inspection for the EGR valve.

Resistance Inspection

Note

• Perform the following test only when directed.

1. Disconnect the negative battery cable.

2. Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION [L3].)

3. Inspect resistance of the EGR valve coils.

• If not as specified, replace the EGR valve.

• If as specified, carry out the "Circuit Open/Short Inspection".

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [LF, L3].)

2. Inspect the following wiring harness for open or short (continuity check).

• If there is no continuity, the circuit is open. Repair or replace the harness.

- EGR valve terminal E (harness-side) and PCM terminal 4E

- EGR valve terminal A (harness-side) and PCM terminal 4H

- EGR valve terminal B (harness-side) and PCM terminal 4K

- EGR valve terminal F (harness-side) and PCM terminal 4N

- EGR valve terminal C or D (harness-side) and main relay terminal C (harness-side)

• If there is continuity, the circuit is shorted. Repair or replace the harness.

- EGR valve terminal E (harness-side) and GND

- EGR valve terminal A (harness-side) and GND

- EGR valve terminal B (harness-side) and GND

- EGR valve terminal F (harness-side) and GND

- EGR valve terminal C or D (harness-side) and power supply

3. Remove the EGR valve, and inspect for any damage or clogging.

• If there is no damage or no clogging, replace the EGR valve.