With CONSULT - Screen Terms

COMPONENT DESCRIPTION
The EGR temperature sensor detects temperature changes in the EGR passage way. When the EGR valve opens, hot exhaust gases flow, and the temperature in the passage way changes. The EGR temperature sensor is a thermistor that modifies a voltage signal sent from the ECM. This modified signal then returns to the ECM as an input signal. As the temperature increases, EGR temperature sensor resistance decreases.

This sensor is not directly used to control the engine system. It is used only for the on board diagnosis.






CONSULT REFERENCE VALUE IN DATA MONITOR MODE
Specification data are reference values.






ON BOARD DIAGNOSIS LOGIC


DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE
Perform "Procedure for malfunction A" first. If DTC cannot be confirmed, perform "Procedure for malfunction B".

Procedure for malfunction A

NOTE: If "DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch "OFF" and wait at least 5 seconds before conducting the next test.






With CONSULT
1) Turn ignition switch "ON".
2) Select "DATA MONITOR" mode with CONSULT.
3) Verify that engine coolant temperature is less than 40°C (104°F).
If the engine coolant temperature is above the range, cool the engine down.
4) Start engine and let it idle for at least 8 seconds.



Procedure for malfunction B

CAUTION: Always drive vehicle at a safe speed.

NOTE: If "DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch "OFF" and wait at least 5 seconds before conducting the next test.

TESTING CONDITION:
Always perform the test at a temperature of -10°C (14°F) or higher.






With CONSULT
1) Start engine and warm it up to normal operating temperature.
2) Run engine at idle for at least 2 minutes.
3) Confirm that EGR valve is not lifting.
If the check result is NG, go to "TROUBLE DIAGNOSES FOR DTC P0400, P0402 and P1402".
4) Select "DATA MONITOR" mode with CONSULT.






5) Read "EGR TEMP SEN" at about 1,500 rpm while holding the EGR valve in full open position by hand.
Voltage should decrease to less than 1.0V.
If the check result is NG, go to "DIAGNOSTIC PROCEDURE".
If the check result is OK, go to following step.
6) Turn ignition switch "OFF" and wait at least 5 seconds.
7) Turn ignition switch "ON".
8) Check the output voltage of "THRTL POS SEN" (at closed throttle position) and note it.
9) Start engine.
10) Maintain the following conditions for at least 5 consecutive seconds.

CKPS-RPM (POS): 1,600 - 2,200 rpm (A/T)
1,800 - 2,400 rpm (M/T)
VHCL SPEED SE: 10 km/h (6 MPH) or more
B/FUEL SCHDL: 2.5 - 4.0 ms (A/T)
2.5 - 3.5 ms (M/T)
THRTL POS SEN: (X + 0.30) - (X + 0.59) V (A/T)
(X + 0.37) - (X + 0.76) V (M/T)
X = Voltage value measured at Step 8)
Selector lever: Suitable position






Electrical Diagrams






Circuit Connectors






DIAGNOSTIC PROCEDURE


COMPONENT INSPECTION
EGR temperature sensor









Check resistance change and resistance value.
If NG, replace EGR temperature sensor.