EGR System Inspection
1. INSPECT EGR SYSTEM2. INSPECT RESISTANCE OF EGR VALVE POSITION SENSOR
a. Disconnect the EGR valve position sensor connector.
b. Using an ohmmeter, measure the resistance between the terminals VC and E2.
Resistance: 1.5 - 4.3 k Ohms
If the resistance is not as specified, replace the EGR valve position sensor.
c. Reconnect the EGR valve position sensor connector.
3. INSPECT POWER OUTPUT VOLTAGE OF EGR VALE POSITION SENSOR
a. Disconnect the vacuum hose from the EGR valve.
b. Turn the ignition switch ON.
c. Connect a voltmeter to terminals VC and E2 of the ECU, and measure the power source voltage.
Voltage: 4.5 - 5.5V
d. Connect a voltmeter to terminals EGLS and E2 of the ECU, and measure the power outlet voltage under the following conditions:
- Using the MITYVAC (Hand-Held Vacuum Pump), apply a vacuum (17.3 kPa, 130 mmHg, 5.1 in.Hg) to the EGR valve.
Voltage: 3.2 - 5.1 V
- Release the vacuum from the EGR valve.
Voltage: 0.4 - 1.6V
If the voltage is not as specified, replace the EGR valve position sensor.
e. Reconnect the vacuum hose to the EGR valve.
4. REMOVE EGR POSITION SENSOR
Remove the 3 nuts and EGR valve position sensor from the EGR valve.
5. REINSTALL EGR POSITION SENSOR
Torque: 2 N.m (20 kgf.cm, 17 in..lbf)
6. REMOVE EGR PIPE
Remove the 4 nuts, EGR pipe and 2 gaskets.
HINT: At the time of installation, please refer to the following items.
Install 2 new gaskets.
Torque: 12 N.m (120 kgf.cm, 9 ft.lbf)
7. DISCONNECT EGR GAS TEMPERATURE SENSOR CONNECTOR AND CLAMP
8. REMOVE EGR VALVE
a. Disconnect these hoses and connectors:
1. EVAP hose from EGR valve hook
2. Vacuum hose from EGR valve
3. EGR valve position sensor connector
b. Remove the 3 nuts, EGR valve and gasket.
HINT: At the time of installation, please refer to the following items.
Install a new gasket.
9. REMOVE EGR GAS TEMPERATURE SENSOR
10. INSPECT EGR VALVE
Check for sticking and heavy carbon deposits.
If a problem is found, replace the EGR valve.
11. REINSTALL EGR GAS TEMPERATURE SENSOR
Torque: 20 N.m (200 kgf.cm, 14 ft.lbf)
12. REINSTALL EGR VALVE
Torque: 12 N.m (120 kgf.cm, 9 ft.lbf)
13. REMOVE VCV
14. INSPECT VCV
a. Connect the MITYVAC (Hand-Held Vacuum Pump) to port S of the VCV
b. Plug port Z completely with fingers.
c. Perform pumping 3 times and apply vacuum as shown in the illustration.
d. Stop the performing pumping and check the indicated value of the MITYVAC after about 10 seconds.
Standard value:
15 - 24 kPa (112 - 180 mmHg, 4.4 - 7.1 in.Hg)
If the indicated value is not as specified, replace the VCV.
15. REINSTALL VCV
16. INSPECT VSV FOR EGR