Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001HAMN
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [01/2019 - 03/2019]
Title: DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart Key System): Only Wireless Control Function is Inoperative; 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]

Only Wireless Control Function is Inoperative

DESCRIPTION

The door control and tire pressure monitoring system receiver assembly receives signals from the door control transmitter assembly and sends these signals to the main body ECU (multiplex network body ECU). The main body ECU (multiplex network body ECU) then controls all doors by sending lock/unlock signals to each door, and sends hazard flasher signals to the combination meter assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • When replacing or inspecting the door control and tire pressure monitoring system receiver assembly and wire harness, do not change the position or length of the wire harness. If the wire harness is too close to the door control and tire pressure monitoring system receiver assembly, wireless function performance may be affected.
  • Before replacing the door control transmitter assembly, refer to Registration.

    Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart Key System): REGISTRATION

  • When replacing the door control and tire pressure monitoring system receiver assembly, read the transmitter IDs (tire pressure warning system) stored in the old ECU using the Techstream and write them down before removal.

    Click here 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]; TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM (for Gasoline Model (for Type A)): REGISTRATION

  • If the door control and tire pressure monitoring system receiver assembly has been replaced, it is necessary to perform initialization (Click here 2019 - 2023 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 11/2022]; TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM (for Gasoline Model (for Type A)): INITIALIZATION after registration (Click here 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]; TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM (for Gasoline Model (for Type A)): REGISTRATION ) of the transmitter IDs to the door control and tire pressure monitoring system receiver assembly.

PROCEDURE

1.

CHECK POWER DOOR LOCK OPERATION

(a) Check the power door lock operation.

Click here 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM (for Sedan, Gasoline Model): OPERATION CHECK

OK:

Locked doors unlock.

NG

GO TO POWER DOOR LOCK CONTROL SYSTEM

OK

2.

CHECK KEY REMINDER WARNING SYSTEM

(a) Check that the key reminder warning buzzer operates properly.

Click here 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM (for Sedan, Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING

OK:

Key reminder warning buzzer operates properly.

NG

GO TO KEY REMINDER WARNING SYSTEM

OK

3.

CHECK DOOR CONTROL TRANSMITTER ASSEMBLY

(a) When a known good registered door control transmitter assembly is used, check that the wireless functions operate properly.

Result

Proceed to

Wireless door lock/unlock function operates properly with a known good door control transmitter assembly

A

Wireless door lock/unlock function does not operate

B
B

GO TO STEP 5

A

4.

CHECK TRANSMITTER BATTERY (VOLTAGE)

(a) Inspect the transmitter battery capacity.

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; DOOR LOCK: DOOR CONTROL TRANSMITTER (w/o Smart Key System): INSPECTION

OK

REPLACE DOOR CONTROL TRANSMITTER ASSEMBLY
NG

REPLACE TRANSMITTER BATTERY

5.

CHECK WAVE ENVIRONMENT

(a) Bring the door control transmitter assembly near the door control and tire pressure monitoring system receiver assembly, and perform wireless operation check.

HINT:

  • When the door control transmitter assembly is brought near the door control and tire pressure monitoring system receiver assembly, the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.
  • If the inspection result is that the problem only occurs in certain locations or times of day, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.

OK:

Wireless functions operate properly.

OK

END (AFFECTED BY WAVE INTERFERENCE)
NG

6.

CHECK SELF-DIAGNOSTIC MODE

(a) Switch to self-diagnostic mode.

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]; DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart Key System): DIAGNOSIS SYSTEM

(b) Check self-diagnostic mode.

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]; DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart Key System): DIAGNOSIS SYSTEM

Result

Proceed to

Normal pattern (interior light output pattern) is output

A

Unmatching recognition code is output

B

No diagnostic output

C
A

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

C

GO TO STEP 8

B

7.

CHECK REGISTER RECOGNITION CODE

(a) Check that the system can be switched to rewrite mode or add mode, and that a recognition code can be registered.

Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart Key System): REGISTRATION

OK:

Recognition code can be registered.

OK

END (GO TO OPERATION CHECK)
NG

GO TO STEP 12

8.

CHECK DOOR CONTROL AND TIRE PRESSURE MONITORING SYSTEM RECEIVER ASSEMBLY (RESPONSE)

(a) Prepare a door control transmitter assembly from another vehicle.

(b) Press and hold a door control transmitter assembly switch.

(c) Check that an unmatching recognition code is output.

OK:

Unmatching recognition code is output.

OK

REPLACE DOOR CONTROL TRANSMITTER ASSEMBLY
NG

9.

CHECK HARNESS AND CONNECTOR (DOOR CONTROL AND TIRE PRESSURE MONITORING SYSTEM RECEIVER ASSEMBLY - POWER SOURCE AND BODY GROUND)

(a) Disconnect the O124 door control and tire pressure monitoring system receiver assembly connector.

*a

Front view of wire harness connector

(to Door Control and Tire Pressure Monitoring System Receiver Assembly)

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

O124-12 (GND) - Body ground

Always

Below 1 Ω

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

O124-7 (+B) - Body ground

Always

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

10.

CHECK DOOR CONTROL AND TIRE PRESSURE MONITORING SYSTEM RECEIVER ASSEMBLY (OUTPUT)

(a) Reconnect the O124 door control and tire pressure monitoring system receiver assembly connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

O124-4 (RDA) - Body ground

Procedure:

  1. Remove key from ignition key cylinder
  2. Close all doors
  3. Press lock or unlock switch of door control transmitter assembly

11 to 14 V → pulse generation

*a

Component with harness connected

(Door Control and Tire Pressure Monitoring System Receiver Assembly)
NG

REPLACE DOOR CONTROL AND TIRE PRESSURE MONITORING SYSTEM RECEIVER ASSEMBLY

OK

11.

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - DOOR CONTROL AND TIRE PRESSURE MONITORING SYSTEM RECEIVER ASSEMBLY)

(a) Disconnect the I84 main body ECU (multiplex network body ECU) connector.

(b) Disconnect the O124 door control and tire pressure monitoring system receiver assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

O124-4 (RDA) - I84-10 (RDA)

Always

Below 1 Ω

O124-5 (PRG) - I84-11 (PRG)

Always

Below 1 Ω

O124-4 (RDA) or I84-10 (RDA) - Other terminals and body ground

Always

10 kΩ or higher

O124-5 (PRG) or I84-11 (PRG) - Other terminals and body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

12.

REPLACE DOOR CONTROL AND TIRE PRESSURE MONITORING SYSTEM RECEIVER ASSEMBLY

(a) Temporarily replace the door control and tire pressure monitoring system receiver assembly with a new or known good one.

Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 04/2020]; DOOR LOCK: DOOR CONTROL RECEIVER (for Sedan with Tire Pressure Warning System): REMOVAL

NEXT

13.

REGISTER RECOGNITION CODE

(a) Perform the Registration procedure.

Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart Key System): REGISTRATION

NEXT

14.

CHECK DOOR CONTROL AND TIRE PRESSURE MONITORING SYSTEM RECEIVER ASSEMBLY (OPERATION)

(a) Check that the doors can be locked and unlocked by the door control transmitter assembly lock and unlock switches.

OK:

Doors can be locked and unlocked by the door control transmitter assembly.

OK

END (DOOR CONTROL AND TIRE PRESSURE MONITORING SYSTEM RECEIVER ASSEMBLY WAS DEFECTIVE)
NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)