EGR Temperature Sensor: Testing and Inspection
PROCEDURE1. Disconnect Negative (-) Terminal Cable From Battery.
CAUTION: Work must be started after 90 seconds from the time the ignition switch is turned to the LOCK position and the negative (-) terminal cable is disconnected from the battery.
2. Remove No.2 Exhaust Gas Recirculation (EGR) pipe; remove the 4 nuts, EGR pipe and 2 gaskets.
3. Disconnect the EGR Gas Temperature Sensor connector and clamp.
4. Remove EGR Valve and Vacuum Modulator assembly.
^ Disconnect the following hoses:
Vacuum hose from port P of EGR Vacuum Modulator. (1)
Vacuum hose from port Q of EGR Vacuum Modulator. (2)
Vacuum hose from port R of EGR Vacuum Modulator. (3)
Vacuum hose from EGR Valve. (4)
^ Remove the 3 nuts. EGR Valve and Vacuum Modulator assembly and gasket.
5. Remove EGR Gas Temperature Sensor.
6. Inspect EGR Gas Temperature Sensor using an ohmmeter; measure the resistance between the terminals. Resistance:
64 - 97 k ohms at 50°C (112°F)
11 - 16 k ohms at 100°C (212°F)
2 - 4 k ohms at 150°C (302°F)
If the resistance is not as specified, replace the sensor.
7. Reinstall EGR Gas Temperature Sensor.
Torque: 20 N.m (14 ft lb).
8. Reinstall EGR Valve and Vacuum Modulator assembly with the 3 nuts.
Torque: 12 N.m (9 ft lb).
9. Reconnect the negative (-) terminal of the battery.