DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM (for Sedan, HV Model): HOW TO PROCEED WITH TROUBLESHOOTING; 2020 - 2022 MY Corolla Corolla HV [01/2019

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000001HAJI
Model Year Start: 2020	Model: Corolla	Prod Date Range: [01/2019 - 09/2022]
Title: DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM (for Sedan, 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 following procedure to troubleshoot the power door lock control system.
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	CUSTOMER PROBLEM ANALYSIS CHECK

HINT:

In troubleshooting, confirm 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.
The following 5 items are important points for problem analysis:

What	Vehicle model, system name
When	Date, time, occurrence frequency, whether the problem occurred recently or has been occurring for a long time
Where	Whether the problem occurs at a specific location
Under what conditions?	Whether the doors were locked or unlocked, whether the power switch on (IG), whether the hybrid vehicle control system has started.
How did it happen?	Problem symptoms

3.	READ AND SAVE OPERATION HISTORY

NOTICE:

If the vehicle or vehicle controls are operated (for example, during initial inspection when the vehicle is brought in for repair) before operation history has been read and saved, the operation history information could be lost.
The operation history function uses the current system time of the Techstream and the time counter inside the controlling ECU to calculate the times shown in the operation history. For this reason, before reading the operation history, first make sure that the Techstream system clock is accurately set to the current time.

(a) Read and save operation history using the Techstream.

Click here

Body Electrical > Main Body > Utility

Tester Display
Operation History

PRE-CHECK

(a) Measure the auxiliary battery voltage with the power switch off.

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.

(b) Check the fuses and relays.

(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

5.	CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

(a) Using the Techstream, check for LIN communication system DTCs.

Click here

Result	Proceed to
LIN DTCs are not output	A
LIN DTCs are output	B

GO TO LIN COMMUNICATION SYSTEM

6.	CHECK FOR DTC (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY)*

(a) Clear the DTCs.

Click here

Body Electrical > Master Switch > Clear DTCs

(b) Recheck for DTCs.

Body Electrical > Master Switch > Trouble Codes

Result	Proceed to
DTC B2312 is not output	A
DTC B2312 is output	B

GO TO POWER WINDOW CONTROL SYSTEM

7.	PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

Result	Proceed to
Fault is not listed in Problem Symptoms Table (Fault can be simulated)	A
Fault is not listed in Problem Symptoms Table (Fault cannot be simulated)	B
Fault is listed in Problem Symptoms Table	C

CHECK FOR INTERMITTENT PROBLEMS

GO TO STEP 9

8.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU

Click here

(b) Data List / Active Test

Click here

(d) Inspection

9.	REPAIR OR REPLACE

10.	CONFIRMATION TEST

END