EGR Temperature Sensor: Service and Repair
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 Temperarature 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 Nm (14 ft lb).
8. Reinstall EGR Valve and Vacuum Modulator assembly with the 3 nuts.
Torque: 12 Nm (9 ft lb).
- Reconnect 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)
9. Reconnect the EGR Gas Temperature Sensor connector and bracket.
10. Reinstall the No. 2 EGR Pipe with two new gaskets and the four nuts.
Torque: 12 Nm (9 ft lb)
11. Reconnect the negative (-) terminal of the battery.