PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING; 2023 - 2025 MY Corolla Corolla HV [09/2022

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM1000000026COX
Model Year Start: 2023	Model: Corolla	Prod Date Range: [09/2022 - ]
Title: PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ]

HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

HINT:

*: Use the GTS.

1.	VEHICLE BROUGHT TO WORKSHOP

2.	CUSTOMER PROBLEM ANALYSIS

(a) Interview the customer and confirm the problem.

Click here

3.	INSPECT AUXILIARY BATTERY VOLTAGE

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.

4.	CHECK DTC AND FREEZE FRAME DATA*

(a) Check and record DTCs and freeze frame data.

(b) Clear the DTCs and freeze frame data.

(1) Reconfirm the DTCs based on the recorded DTCs and freeze frame data.

(2) Try to reproduce the problem symptoms based on the recorded DTCs and freeze frame data, and then check if the DTCs are output again.

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

HINT:

Refer to Diagnostic Trouble Code Chart if any DTCs are output.
When DTCs indicating a CAN communication system malfunction are output, first troubleshoot and repair the CAN communication system.

5.	PROBLEM SYMPTOMS TABLE

(a) Proceed to Problem Symptoms Table.

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Result	Proceed to
Fault is not listed in Problem Symptoms Table	A
Fault is listed in Problem Symptoms Table	B

6.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Refer to Terminals of ECU.

Click here

(b) Refer to Data List / Active Test.

Click here

7.	REPAIR OR REPLACE

8.	CONFIRMATION TEST

END