PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING; 2020 - 2022 MY Corolla Corolla HV [01/2019

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM100000001G8ZH
Model Year Start: 2020	Model: Corolla	Prod Date Range: [01/2019 - 09/2022]
Title: PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

HINT:

*: Use the Techstream.

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.

GO TO DIAGNOSTIC TROUBLE CODE CHART

5.	PROBLEM SYMPTOMS TABLE

(a) Proceed 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

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