EGR Valve: Testing and Inspection

EGR VALVE INSPECTION

Resistance Inspection

NOTE: Perform the following test only when directed.

1. Disconnect the negative battery cable.










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




California emission regulation applicable ATX model




Except for California emission regulation applicable ATX model

Open circuit

- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
- EGR valve terminal E and PCM terminal 98*1, 4E*2
- EGR valve terminal A and PCM terminal 99*1, 4H*2
- EGR valve terminal B and PCM terminal 72*1, 4K*2
- EGR valve terminal F and PCM terminal 73*1, 4N*2
- EGR valve terminal C or D and main relay terminal C

Short circuit

- If there is continuity, there is a short circuit. Repair or replace the wiring harness.
- EGR valve terminal E and GND
- EGR valve terminal A and GND
- EGR valve terminal B and GND
- EGR valve terminal F and GND
- EGR valve terminal C or D 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.

*1 : California emission regulation applicable ATX model
*2 : Except for California emission regulation applicable ATX model