Hint
: hand–held tester only: narrowing down the trouble area is possible by performing ”a/f control” active test (heated oxygen sensor or other trouble areas can be distinguished).
Hint
: ”a/f control” is the active test which changes the injection volume to –12.5 % Or +25 %.
Result
: heated oxygen sensor reacts in accordance with increase and decrease of injection volume +25 % rich output: more than 0.5 V, –12.5 % Lean output: less than 0.4 V
Notice
: there is a delay of few seconds in the sensor 1 (front sensor) output, and there is about 20 seconds delay at maximum in the sensor 2 (rear sensor).
The following of a/f control procedure enables the technician to check and graph the voltage outputs of both the heated oxygen sensors.
For displaying the graph indication, enter ”active test / a/f control / user data”, then select ”o2s b1s1 and o2s b1s2” by pressing ”yes” button and push ”enter” button before pressing ”f4” button.
Notice
: if the vehicle is short of fuel, the air–fuel ratio becomes lean and heated oxygen sensor dtcs will be recorded, and the mil then comes on.
Hint
:
Check for conditions that would cause the engine to run rich.
Check for conditions that would cause the engine to run lean.
1 Check other dtc output(in addition to heated oxygen sensor dtcs)
Result:
Hint
: if any other codes besides p0130, p2195 and/or p2196 are output, perform the troubleshooting for those dtcs first.
2 Read value of hand–held tester or
Heated oxygen sensor output voltage:
alternates repeatedly between less than 0.4 V and more than 0.5 V (see the following table).
3 Inspect heated oxygen sensor(heater resistance)
Standard:
4 Inspect efi relay
Standard:
5 Check harness and connector(heated oxygen sensor – ecm)
Standard (check for open):
Standard (check for short):
6 Check air induction system
7 Check fuel pressure
8 Inspect fuel injector assy(injection and volume)
Replace heated oxygen sensor
9 Perform confirmation driving pattern
Hint
: clear all dtcs prior to performing the confirmation driving pattern.
10 Read output dtc(heated oxygen sensor dtcs are output again)
Result:
Replace heated oxygen sensor
Coolant
Replacement
1. Drain coolant
Caution:
to avoid the danger of being burned, do not remove the radiator
cap while the engine and radiator are still hot, as fluid
and steam can be blown out under pressure.
remove the radiator cap.
loosen the radiator and engine drain plugs, a ...
Glossary of sae and toyota terms
This glossary lists all sae–j1930 terms and abbreviations used in this manual
in compliance with sae recommendations,
as well as their toyota equivalents.
...
Inspection procedure
1 Check operation(overdrive)
Drive the vehicle after the engine warms up.
check that overdrive on e off occurs by an operation of the o/d
switch on–off.
2 Inspect terminal voltage(od)
Remove the cruise control ecu assy with the connector
still connected.
turn ...