EGR VALVE (w/o DPF) INSPECTION

Text in Illustration

*1	Ohmmeter
*2	Ventilation Port
*3	Air Filter

Inspect the vacuum regulating valve.

1. Check the resistance between the terminals.

   Standard resistance
   11 to 13 Ω at 20°C (68°F)

2. Apply battery voltage across the terminals, and check that air flows from each port.

   Standard
   Measuring Condition Measuring Port Airflow Battery voltage not applied E←→Ventilation port Airflows Battery voltage not applied Ventilation port←→F E←→F Air does not flow Battery voltage applied E←→F Airflows Battery voltage applied Ventilation port←→E Ventilation port←→F Air does not flow

Inspect the EGR valve.

1. When a vacuum of 26.7 kPa (200 mmHg, 7.87 in.Hg) is applied to the diaphragm chamber, check that the shaft rises and that air flows out.

2. Maintaining the above conditions, check again that there are no leaks and that the shaft does not lower.

3. Check that the valve is not stuck and does not have heavy carbon deposits.

   If the result is not as specified, replace the electric EGR control valve.

Text in Illustration

*1

Ohmmeter

Inspect the EGR valve position sensor.

1. Using an ohmmeter, measure the resistance between terminals 1 (VC) and 2 (E2) of the EGR valve position sensor.

   Standard resistance
   4.0 k to 6.0 kΩ at 20°C (68°F)

   If the result is not as specified, replace the electric EGR control valve.

2. 

   Text in Illustration

   *1

   Ohmmeter

   Create a vacuum in the diaphragm chamber. Measure the resistance between terminals 3 (EGLS) and (E2) of the lift sensor when the valve is fully opened and fully closed.

   Standard resistance
   EGR Valve Condition Specified Condition Fully opened 3.9 kΩ at 20°C (68°F) Fully closed 1.0 kΩ at 20°C (68°F)

   Tech Tips

   The resistance increases in proportion to the opening angle of the EGR valve.

   If the result is not as specified, replace the electric EGR control valve.