Toyota Yaris: Airbag System / How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the airbag system.
- *: Use the GTS.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
| 2. | CUSTOMER PROBLEM ANALYSIS |
(a) Interview the customer and confirm the problem.
Click here
|
| 3. | INSPECT AUXILIARY BATTERY VOLTAGE |
(a) Measure the auxiliary battery voltage with the ignition switch off.
Standard Voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.
(b) Check the fuses and relays.
(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.
|
| 4. | CHECK CAN COMMUNICATION SYSTEM* |
(a) Using the GTS, check if the CAN communication system is functioning normally.
OK:
CAN communication system is functioning normally.
HINT:
-
Refer to Communication Bus Check in CAN Communication System.
Click here
- The airbag sensor assembly is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there are no malfunctions in the CAN communication system.
| NG |
 | GO TO CAN COMMUNICATION SYSTEM |
|
| 5. | CHECK VEHICLE CONTROL HISTORY (RoB)* |
(a) Check and record Vehicle Control History (RoB).
Click here
|
| 6. | CHECK DTC AND FREEZE FRAME DATA* |
(a) Check and record current DTCs, history DTCs and Freeze Frame Data.
for Freeze Frame Data: Click here
HINT:
Refer to Airbag System Diagnostic Trouble Code Chart: Click here
| Result | Proceed to |
|---|---|
| Airbag system DTCs are output | A |
| DTCs are not output | B |
| B |
 | GO TO PROBLEM SYMPTOMS TABLE |
|
| 7. | CLEAR DTC* |
(a) Clear the DTCs stored in memory.
Body Electrical > SRS Airbag > Clear DTCs
|
| 8. | CHECK DTC* |
(a) Check for DTCs.
Body Electrical > SRS Airbag > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are output | A |
| DTCs are not output | B |
| B |
 | USE SIMULATION METHOD TO CHECK |
|
| 9. | DIAGNOSTIC TROUBLE CODE CHART |
(a) Proceed to Diagnostic Trouble Code Chart and perform troubleshooting for each code.
Click here
|
| 10. | IDENTIFICATION OF PROBLEM |
|
| 11. | REPAIR OR REPLACEMENT |
|
| 12. | CONFIRMATION TEST |
| NEXT |
 | END |
System Description
SYSTEM DESCRIPTION FUNCTION OF SRS CONNECTORS (a) Location of activation prevention mechanism
(b) Function of activation prevention mechanism
(1) This mechanism is designed to create a short circuit automatically between the positive (+) and negative (-) terminals of a squib power source connector when disconnected...
Operation Check
OPERATION CHECK PRECAUTION FOR OPERATION CHECK
Be sure to read Precaution thoroughly before servicing.
Click here
Be sure to correctly follow the removal and installation procedures for the SRS parts...
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DESCRIPTION In some cases, wireless door lock control functions are normal but the hazard warning light do not operate. In such cases, hazard warning light outputs from the main body ECU (multiplex network body ECU) may be malfunctioning. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: The wireless door lock control system uses the CAN communication system...
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Liftgate/Trunk Lid
WARNING
Never allow a person to ride in the luggage compartment/trunk
Allowing a person to ride in the luggage compartment/trunk is dangerous. The person in the luggage compartment/trunk could be seriously injured or killed during sudden braking or a collision.
Do not drive with the liftgate/trunk lid open
