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Toyota Corolla Repair Manual: How to proceed with troubleshooting

Toyota Corolla Repair Manual / Diagnostics / Sfi system / How to proceed with troubleshooting

The handheld tester can be used at step 3, 4, 5, 7, 10.

1 Vehicle brought to workshop

2 Customer problem analysis

2 Customer problem analysis

3 Connect handheld tester to dlc3

3 Connect handheld tester to dlc3

Hint

: if the display indicates a communication fault in the tool, inspect dlc3.

4 Check dtc and freeze frame data

4 Check dtc and freeze frame data

Hint

: record or print dtc and freeze frame data, if needed.

5 Clear dtc and freeze frame data

5 Clear dtc and freeze frame data

6 Visual inspection

6 Visual inspection

7 Setting check (test) mode diagnosis

7 Setting check (test) mode diagnosis

8 Problem symptom confirmation

8 Problem symptom confirmation

Hint

: if the engine does not start, perform steps 10 and 12 first.

A Malfunction does not occur
B Malfunction occurs

B go to step 10

9 Symptom simulation

9 Symptom simulation

10 Dtc check

10 Dtc check

A Malfunction code
B No code

B go to step 12

11 Dtc chart

11 Dtc chart

Go to step 14

Go to step 14

12 Basic inspection

A Wrong parts not confirmed
B Wrong parts confirmed

B go to step 17

13 Problem symptoms table

13 Problem symptoms table

A Wrong circuit confirmed
B Wrong parts confirmed

B go to step 17

14 Check ecm power source circuit

14 Check ecm power source circuit

15 Circuit inspection

15 Circuit inspection

A Malfunction not confirmed
B Malfunction confirmed

B go to step 18

16 Check for intermittent problems

16 Check for intermittent problems

Go to step 18

Go to step 18

17 Parts inspection

18 Identification of problem

18 Identification of problem

19 Adjustment, repair

19 Adjustment, repair

20 Confirmation test

20 Confirmation test

End

End

Sfi system
...

Customer problem analysis check
...

Other materials:

Evap monitor (vacuum pressure monitor)
Notice: a cold soak must be performed prior to conducting the drive pattern to complete the internal pressure readiness monitor. Cold soak preconditions The monitor will not run unless: mil is off. Fuel level is approximately 1/2 to 3/4. Altitude is 7800 feet (2400 m) or less. ...

Failsafe chart
If any of the following codes is recorded, the ecm enters the failsafe mode. Check for intermittent problems Handheld tester only: by putting the vehicles ecm in the check mode, the 1 trip detection logic is possible instead of the 2 trip detection logic, and the sensitivity to detect f ...

Circuit description
Refer to dtc p0130 Dtc no. Dtc detecting condition Trouble area P0134 After engine is warmed up, heated oxygen sensor (bank 1 sensor 1) output does not indicate rich (greater than 0.45 V) even once when conditions (a), (b), (c), (d) and (e) continue for ...

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