| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001N4LS |
| Model Year Start: 2021 | Model: Corolla | Prod Date Range: [04/2020 - ] |
| Title: TELEMATICS: TELEMATICS SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING; 2021 - 2025 MY Corolla Corolla HV [04/2020 - ] | ||
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HOW TO PROCEED WITH TROUBLESHOOTING |
CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the telematics system.
- *: Use the Techstream.
PROCEDURE
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1. |
VEHICLE BROUGHT TO WORKSHOP |
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2. |
CUSTOMER PROBLEM ANALYSIS |
HINT:
- In troubleshooting, check that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
- Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
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The following 5 items are important points for analysis:
What
Vehicle model, system name
When
Date, time, occurrence frequency
Where
Road conditions
Under what conditions?
Driving conditions, weather conditions
How did it happen?
Problem symptoms
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3. |
INSPECT AUXILIARY BATTERY |
(a) Measure the auxiliary battery voltage with the power switch off.
Standard voltage:
11 to 14 V
HINT:
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.
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4. |
CHECK CAN COMMUNICATION SYSTEM* |
(a) Check if CAN communication system DTCs are output.
Click here
![2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
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Result |
Proceed to |
|---|---|
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CAN DTCs are not output. |
A |
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CAN DTCs are output. |
B |
| B |
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GO TO CAN COMMUNICATION SYSTEM
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5. |
CHECK DTC* |
(a) Check for DTCs.
Safety Connect System: Click here
Telematics System: Click here
Body Electrical > Telematics > Trouble Codes
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Result |
Proceed to |
|---|---|
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DTCs are not output. |
A |
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Safety connect system DTCs are output. |
B |
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Telematics system DTCs are output. |
C |
| B |
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GO TO SAFETY CONNECT SYSTEM
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| C |
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6. |
CHECK VEHICLE OPERATION HISTORY* |
(a) Check for vehicle control history and note any codes that are output.
Click here
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Result |
Proceed to |
|---|---|
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No vehicle control history is output |
A |
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Any vehicle control history is output |
B |
| B |
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GO TO VEHICLE CONTROL HISTORY
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7. |
PROBLEM SYMPTOMS TABLE |
(a) Refer to Problem Symptoms Table.
Click here
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Result |
Proceed to |
|---|---|
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Fault is not listed in Problem Symptoms Table. |
A |
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Fault is listed in Problem Symptoms Table. |
B |
HINT:
If the symptom does not recur and no DTCs are output, perform the simulation method.
Click here
| B |
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8. |
OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Terminals of ECU
Click here
(b) Data List / Active Test
Click here
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9. |
REPAIR OR REPLACE |
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10. |
CONFIRMATION TEST |
| NEXT |
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END |
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