| Last Modified: 08-23-2025 | 6.11:8.1.0 | Doc ID: RM10000000263S6 |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - ] |
| Title: POWER DISTRIBUTION: POWER INTEGRATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING; 2023 - 2026 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ] | ||
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HOW TO PROCEED WITH TROUBLESHOOTING |
CAUTION / NOTICE / HINT
HINT:
- Use these procedures to troubleshoot the power integration system.
- *: Use the GTS.
PROCEDURE
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1. |
VEHICLE BROUGHT TO WORKSHOP |
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2. |
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.
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3. |
CHECK COMMUNICATION FUNCTION OF CXPI COMMUNICATION SYSTEM* |
(a) Using the GTS, check the CXPI communication function to ensure that there are no malfunctions in the communication system.
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Result |
Proceed to |
|---|---|
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No DTCs output |
A |
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DTCs output |
B |
| B |
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4. |
CHECK VEHICLE CONTROL HISTORY (RoB)* |
(a) Using the GTS, check for Vehicle Control History (RoB).
Body Electrical > Power Distribution Box > Utility
|
Tester Display |
|---|
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Vehicle Control History (RoB) |
(b) If the vehicle control history (RoB) is output, record it.
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Result |
Proceed to |
|---|---|
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Vehicle Control History (RoB) is not output |
A |
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Vehicle Control History (RoB) is output |
B |
| B |
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5. |
CHECK FOR DTC* |
(a) Check for DTCs and make a note of any codes that are output.
Click here
![2023 - 2026 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ]; POWER DISTRIBUTION: POWER INTEGRATION SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
(b) Clear the DTCs.
Body Electrical > Power Distribution Box > Clear DTCs
(c) Recheck for DTCs.
Body Electrical > Power Distribution Box > Trouble Codes
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Result |
Proceed to |
|---|---|
|
No DTCs output |
A |
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DTCs output |
B |
| B |
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GO TO DIAGNOSTIC TROUBLE CODE CHART
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6. |
PROBLEM SYMPTOMS TABLE |
(a) Refer to the 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 |
| B |
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ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE |
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7. |
OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Data List / Active Test
Click here
(b) Terminals of ECU
Click here
(c) Problem Symptoms Table
Click here
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8. |
ADJUST, REPAIR OR REPLACE |
| NEXT |
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END |
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