Toyota Yaris: Manual Transaxle System / How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- The ECM of this system is connected to the CAN communication system. Therefore, before starting troubleshooting, be sure to check that there are no malfunctions in the CAN communication system.
- *: Use the GTS.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
| 2. | CUSTOMER PROBLEM ANALYSIS |
(a) Refer to How to Troubleshoot ECU Controlled Systems in Introduction.
Click here
|
| 3. | INSPECT AUXILIARY BATTERY VOLTAGE |
Standard voltage:
11 to 14 V
HINT:
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding.
|
| 4. | CONNECT GTS TO DLC3* |
HINT:
If the display indicates a communication fault in the GTS, inspect the DLC3.
When any CAN communication system DTCs are output, perform troubleshooting on the CAN communication system first.
|
| 5. | CHECK CAN COMMUNICATION SYSTEM* |
(a) Use the GTS to check if the CAN communication system is functioning normally.
CAN Bus CheckHINT:
-
Refer to CAN Bus Check for the CAN communication system.
Click here
- The ECM is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there are no malfunctions in the CAN communications system.
| Result | Proceed to |
|---|---|
| CAN communication DTCs are not output. | A |
| CAN communication DTCs are output. | B |
| B |
 | GO TO CAN COMMUNICATION SYSTEM |
|
| 6. | CHECK AND CLEAR DTCS AND FREEZE FRAME DATA* |
(a) Check for DTCs.
Click here
(b) Check for freeze frame data.
Click here
HINT:
Record or print DTCs and freeze frame data if necessary.
(c) Clear for DTCs.
Click here
|
| 7. | PROBLEM SYMPTOM CONFIRMATION |
(a) Refer to Road Test.
Click here
| Result | Proceed to |
|---|---|
| Symptom does not occur. | A |
| Symptom occurs. | B |
| B |
 | GO TO STEP 9 |
|
| 8. | SYMPTOM SIMULATION |
(a) Refer to Symptom Simulation.
Click here
|
| 9. | CHECK FOR DTC* |
(a) Check for DTCs.
Click here
| Result | Proceed to |
|---|---|
| DTCs are not output. | A |
| DTCs are output. | B |
| B |
 | GO TO STEP 14 |
|
| 10. | PROBLEM SYMPTOMS TABLE |
(a) Refer to Problem Symptoms Table.
Click here
| Result | Proceed to |
|---|---|
| Fault is not listed in problem symptoms table. | A |
| Fault is listed in problem symptoms table. | B |
| B |
 | GO TO STEP 12 |
|
| 11. | OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Data List / Active Test
Click here
(b) Terminals of ECM
Click here
|
| 12. | REPAIR OR REPLACEMENT |
|
| 13. | CONFIRMATION TEST |
(a) Refer to the road test section to perform a road test.
| NEXT |
 | END |
| 14. | DIAGNOSTIC TROUBLE CODE CHART |
(a) Proceed to Diagnostic Trouble Code Chart.
Click here
|
| 15. | CIRCUIT INSPECTION* |
|
| 16. | IDENTIFICATION OF PROBLEM |
| NEXT |
 | GO TO STEP 12 |
System Diagram
S..
Other information:
Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Lost Communication With ECM/PCM "A" Missing Message (U010087,U010187,U012687,U012987,U014087,U015587)
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