Toyota Yaris: Sfi System / How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
*: Use the GTS.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
| 2. | CUSTOMER PROBLEM ANALYSIS |
|
| 3. | CONNECT GTS TO DLC3* |
HINT:
If the display indicates a communication malfunction, inspect the DLC3.
When any CAN communication system DTCs are output, perform troubleshooting for the CAN communication system first.
|
| 4. | CHECK DTC AND FREEZE FRAME DATA* |
(a) Check for DTCs.
Powertrain > Engine > Trouble Codes(b) Check for Freeze Frame Data.
Click here
HINT:
Record or print DTCs and Freeze Frame Data if necessary.
|
| 5. | CHECK VEHICLE CONTROL HISTORY AND VEHICLE CONTROL HISTORY FREEZE FRAME DATA* |
(a) Check for Vehicle Control History and Vehicle Control History Freeze Frame Data.
Powertrain > Engine > Utility| Tester Display |
|---|
| Vehicle Control History (RoB) |
HINT:
Print Vehicle Control History and Vehicle Control History Freeze Frame Data if necessary.
|
| 6. | CLEAR DTC AND FREEZE FRAME DATA* |
(a) Clear the DTCs and Freeze Frame Data.
Powertrain > Engine > Clear DTCs
|
| 7. | CONDUCT VISUAL INSPECTION |
|
| 8. | SELECT CHECK MODE DIAGNOSIS* |
(a) Change the ECM from normal mode to check mode.
Powertrain > Engine > Utility| Tester Display |
|---|
| Check Mode |
|
| 9. | CONFIRM PROBLEM SYMPTOMS |
(a) Confirm the problem symptoms.
HINT:
If the engine does not start, first perform the "Check DTC" procedure and "Conduct Basic Inspection" procedure below.
| Result | Proceed to |
|---|---|
| Malfunction does not occur | A |
| Malfunction occurs | B |
| B |
 | GO TO STEP 11 |
|
| 10. | SIMULATE SYMPTOMS |
HINT:
Refer to Symptom Simulation.
Click here
|
| 11. | CHECK DTC* |
(a) Check for DTCs.
Powertrain > Engine > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are output | A |
| DTCs are not output | B |
| B |
 | GO TO STEP 13 |
|
| 12. | REFER TO DTC CHART |
HINT:
Refer to Diagnostic Trouble Code Chart.
Click here
|
| 13. | CONDUCT BASIC INSPECTION |
(a) Conduct basic inspection.
Click here
| Result | Proceed to |
|---|---|
| Malfunctioning parts not confirmed | A |
| Malfunctioning parts confirmed | B |
| B |
 | GO TO STEP 18 |
|
| 14. | REFER TO PROBLEM SYMPTOMS TABLE |
HINT:
Refer to Problem Symptoms Table.
Click here
| Result | Proceed to |
|---|---|
| Malfunctioning circuit confirmed | A |
| Malfunctioning parts confirmed | B |
| B |
 | GO TO STEP 18 |
|
| 15. | CHECK ECM POWER SOURCE CIRCUIT |
(a) Check the ECM power source circuit.
Click here
|
| 16. | CONDUCT CIRCUIT INSPECTION |
| Result | Proceed to |
|---|---|
| Malfunction not confirmed | A |
| Malfunction confirmed | B |
| B |
 | GO TO STEP 19 |
|
| 17. | CHECK FOR INTERMITTENT PROBLEMS |
(a) Check for intermittent problems.
Click here
|
| 18. | CONDUCT PARTS INSPECTION |
|
| 19. | IDENTIFY PROBLEM |
|
| 20. | ADJUST AND/OR REPAIR |
|
| 21. | CONDUCT CONFIRMATION TEST |
| NEXT |
 | END |
System Diagram
S..
Check For Intermittent Problems
CHECK FOR INTERMITTENT PROBLEMS HINT: Inspect the vehicle ECM using check mode. Intermittent problems are easier to detect with the GTS when the ECM is in check mode...
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Supplemental Restraint System (SRS) Precautions
The front and side supplemental restraint systems (SRS) include different types of air bags. Please verify the different types of air bags which are equipped on your vehicle by locating the “SRS AIRBAG” location indicators. These indicators are visible in the area where the air bags are installed.
The air bags are installed in the following locations:
The steering wheel hub (driver air bag) The front passenger dashboard (front passenger air bag) The outboard sides of the front seatbacks (side air bags) The front and rear window pillars, and the roof edge along both sides (curtain air bags)