OXYGEN SENSOR INSPECTION
18th December 2003
Taken from 4AG-E 20Valve Engine Repair Manual page FI-68 & 69 and summarised
A) Measure O2 sensors pin +B and HT (should get between 11 to 16 ohms at 20 celcius)
If OK then
B) Inspect Feedback Voltage - use analog multi meter to measure voltage between VF1 and E1
Scenario 1 - If 8 times or more means OK good O2 sensor.
Scenario 2 - If less than 8 times repeat 1, 2 and 3 above then: -
If still less than 8 times, disconnect TE1 and E1 and measure voltage between VF1 and E1. If more than 0V - then replace the oxygen sensor.
Scenario 3 - If the needle never fluctuates, i.e. zero times then read and record diagnostic trouble codes.
Repair diagnostic error accordingly
Scenario 4 - If codes are 21 or 25 then proceed below: -
Measure voltage between VF1 and E1. If 0V - disconnect the PCV hose. Wonder what is this?
After disconnecting the PCV (which I don't know what it is), then measure voltage between VF1 and E1 again. If more than 0V = Over rich (repair) - [but repair what???]
Scenario 5 - If the needle never fluctuates, i.e. zero times then read and record diagnostic trouble codes.
Measure voltage between VF1 and E1. If 5V then
If 0V - then replace the oxygen sensor
If 5V = over lean (repair) [but repair what???]
eeeeerrrrrrrrr do you still follow me??? the question is do I still follow the manual???) hehehehehh ahahhahaahh
By the way a new O2 sensor from UMW Toyota cost Ringgit Malaysia (RM) 602.25 - so forget about the new one :(
In case you still want it, start looking from vehicle identity number VIN AE101-ACMZF (Toyota Corolla Levin GT-Apex 2 door) Sensor, OXYGEN part number 89465-19495
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