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I own a 98 Toyota Avilon that has a check engine light on. I have done a code scan and retrieved code P1410 ?
And 1411. The problem is with the EGR system and troubleshooting is very involved. I was wanting to know the most common cause for these codes. I have verified that the VSV is working, the EGR valve does not have a blown diaphragm, the EGR position sensor has the right resistance readings across pins E2 and VC on the position sensor when engine is cold, and the vCV is working properly. What would you replace to correct the problem?
REis- ped which wire is the #1 wire (ie left or right) ? How doe I check the voltage from the computer to the sensor? I have checked the EGR with a vaccum and it appears to be good as does the ohms readings on the position sensor between the E2 and VC pins.
When you say dissconnet the position sensor and turn the ignition on do you mean to crank the car or just put the switch to the on position without cranking? Thanks for the help.
1 Answer
- Anonymous1 decade agoFavorite Answer
do these tests in this order.
PREPARATION:
(a) Disconnect the vacuum hose from EGR valve.
(b) Disconnect the EGR valve position sensor connector.
(c) Turn the ignition switch ON.
CHECK:
Measure voltage between terminal 1 of wire harness side connector
and body ground.
OK:
Voltage: 4.5 ∼ 5.5 V
Check EGR valve position sensor.
PREPARATION:
Disconnect the EGR valve position sensor connector.
CHECK:
Measure resistance between terminals 1(VC) and 2(E2) of
EGR valve position sensor.
OK:
Resistance: 1.5 - 4.3 kΩ
NG Replace EGR valve position sensor.
if ok,
let me know cause you will have to check voltage reading at the ECU. and if those are off, you will have to replace the computer or fix a wire harness.
Source(s): toyota technician