Toyota Yaris: Active Noise Control System / How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the active noise control system.
- *: Use the GTS.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
| 2. | CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CHECK |
|
| 3. | INSPECT AUXILIARY BATTERY VOLTAGE |
(a) Measure the auxiliary battery voltage.
Standard voltage:
11 to 14 V
HINT:
If the auxiliary battery voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.
|
| 4. | CHECK CAN COMMUNICATION SYSTEM* |
(a) Check if the CAN communication system is functioning normally.
Click here
| Result | Proceed to |
|---|---|
| CAN communication system DTCs are not output. | A |
| CAN communication system DTCs are output. | B |
| B |
 | GO TO CAN COMMUNICATION SYSTEM |
|
| 5. | CHECK FOR DTC* |
(a) Check for DTCs and note any codes that are output.
Body Electrical > Active Noise Control > Trouble Codes(b) Clear the DTCs.
Body Electrical > Active Noise Control > Clear DTCs(c) Recheck for DTCs. Try to reproduce the active noise control system DTCs by duplicating the conditions indicated by the DTCs.
Body Electrical > Active Noise Control > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are not output (Problem symptom occurs) | A |
| DTCs are output | B |
| DTCs are not output (Problem symptom does not occur) | C |
| B |
 | GO TO DIAGNOSTIC TROUBLE CODE CHART |
| C |
 | USE SIMULATION METHOD TO CHECK |
|
| 6. | PROBLEM SYMPTOMS TABLE |
HINT:
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 |
 | PERFORM TROUBLESHOOTING BASED ON PROBLEM SYMPTOM |
|
| 7. | OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Terminals of ECU
Click here
(b) Data List / Active Test
Click here
|
| 8. | ADJUST, REPAIR OR REPLACE |
|
| 9. | CONFIRMATION TEST |
| NEXT |
 | END |
System Diagram
S..
Other information:
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Break-In Period
No special break-in is necessary, but a few precautions in the first 600 miles (1,000 km) may add to the performance, economy, and life of the vehicle.
Do not race the engine. Do not maintain one constant speed, either slow or fast, for a long period of time. Do not drive constantly at full-throttle or high engine rpm for extended periods of time. Avoid unnecessary hard stops. Avoid full-throttle starts.