| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM1000000028FKE |
| Model Year Start: 2023 | Model: Corolla Hatchback | Prod Date Range: [11/2022 - ] |
| Title: K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING; 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 - ] | ||
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HOW TO PROCEED WITH TROUBLESHOOTING |
CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the continuously variable transaxle system.
- *: Use the Techstream.
PROCEDURE
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1. |
VEHICLE BROUGHT TO WORKSHOP |
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2. |
CUSTOMER PROBLEM ANALYSIS |
(a) Refer to How to Troubleshoot ECU Controlled Systems in Introduction.
Click here
![2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
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3. |
INSPECT BATTERY VOLTAGE |
(a) Measure the battery voltage.
Standard Voltage:
11 to 14 V
HINT:
If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.
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4. |
CHECK CAN COMMUNICATION SYSTEM* |
(a) Using the Techstream, check if the CAN communication system is functioning normally.
CAN Bus Check
OK:
CAN communication system is functioning normally.
HINT:
-
Refer to CAN Bus Check in CAN Communication System.
Click here
- The TCM 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.
| NG |
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GO TO CAN COMMUNICATION SYSTEM
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5. |
CHECK AND CLEAR DTCS AND FREEZE FRAME DATA* |
(a) Refer to DTC Check/Clear.
Click here
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6. |
SELECT CHECK MODE DIAGNOSIS* |
(a) Refer to Check Mode Procedure.
Click here
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7. |
CHECK FOR DTC* |
(a) Proceed to DTC Check/Clear.
Click here
Powertrain > Transmission > Trouble Codes
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Result |
Proceed to |
|---|---|
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DTCs are not output. |
A |
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DTCs are output. |
B |
| B |
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8. |
BASIC INSPECTION |
(a) Refer to Continuously Variable Transaxle Fluid.
Click here
(b) Refer to Park/Neutral Position Switch.
Click here
(c) Refer to Shift Lever.
Click here
| NG |
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9. |
PROBLEM SYMPTOMS CONFIRMATION |
(a) Refer to Road Test.
Click here
(b) Refer to Mechanical System Tests.
Click here
(c) Refer to Hydraulic Test.
Click here
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Result |
Proceed to |
|---|---|
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Symptom does not occur |
A |
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Symptom occurs |
B |
| B |
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10. |
SYMPTOM SIMULATION |
(a) Refer to Symptom Simulation.
Click here
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11. |
COMPONENT INSPECTION |
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12. |
REPAIR OR REPLACE |
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13. |
CONFIRMATION TEST |
| NEXT |
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END |
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14. |
DIAGNOSTIC TROUBLE CODE CHART |
(a) Proceed to Diagnostic Trouble Code Chart.
Click here
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15. |
CIRCUIT INSPECTION |
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16. |
IDENTIFICATION OF PROBLEM |
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17. |
REPAIR OR REPLACE |
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18. |
CONFIRMATION TEST |
| NEXT |
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END |
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