See Figure 1
- Remove the EGR temperature sensor from the EGR valve and place in a bucket of water with a thermometer.
- Heat the water to 122°deg;F (50°deg;C) and measure the resistance across the sensor terminals. Resistance should be 60-83 ohms.
- Raise the temperature of the water to 212°deg;F (100°deg;C) and measure the resistance again. Resistance should drop to 11-14 ohms.
- Replace the EGR temperature sensor if defective.