#
EGR VALVE INSPECTION [WITH WU-TWC]

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## On-vehicle Inspection

1. Verify that the buzzing sound (valve operation sound) is heard from the EGR valve during engine cranking.

  • If the buzzing sound is not heard, perform the resistance inspection.

## Resistance Inspection

1. Disconnect the negative battery cable.

2. Disconnect the EGR valve connector.

3. Measure the resistance between the EGR valve terminals.

  • If it is within the specification, perform out the "Circuit Open/Short Inspection".
  • If it is not within the specification, replace the EGR valve.

Standard

Terminal | Resistance (ohm)
--- | ---
C-E C-A D-B D-F | 20-24

## Circuit Open/Short Inspection

1. Disconnect the PCM connector.

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

Open circuit

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

  - EGR valve terminal A and PCM terminal 2V
  - EGR valve terminal B and PCM terminal 2R
  - EGR valve terminal C and PCM terminal 2T
  - EGR valve terminal D and PCM terminal 2T
  - EGR valve terminal E and PCM terminal 2Z
  - EGR valve terminal F and PCM terminal 2N

Short circuit

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

  - EGR valve terminal A and body GND
  - EGR valve terminal B and body GND
  - EGR valve terminal E and body GND
  - EGR valve terminal F and body GND