| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM1000000028DY7 |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [11/2022 - ] |
| Title: DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: Only Back Door cannot be Opened; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - ] | ||
|
Only Back Door cannot be Opened |
DESCRIPTION
The main body ECU (multiplex network body ECU) receives signals from the back door opener switch assembly. Then, the main body ECU (multiplex network body ECU) activates the back door lock motor.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
-
If the main body ECU (multiplex network body ECU) is replaced, refer to the Smart Key System (for Start Function).*
*: w/ Smart Key System
for HV Model: Click here
![2023 - 2025 MY Corolla Corolla HV [09/2022 - ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION](/t3Portal/stylegraphics/info.gif)
for Gasoline Model: Click here
-
The power door lock control system uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the power door lock control system after confirming that the communication systems are functioning properly.
Click here
PROCEDURE
|
1. |
PERFORM ACTIVE TEST USING GTS (TRUNK LID / BACK DOOR OPEN) |
(a) Perform the Active Test according to the display on the GTS.
Body Electrical > Main Body > Active Test
|
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Trunk Lid / Back Door Open |
Back door lock motor |
OFF/ON |
- |
Body Electrical > Main Body > Active Test
|
Tester Display |
|---|
|
Trunk Lid / Back Door Open |
OK:
The back door lock assembly with courtesy light switch unlatches when ON is selected.
| OK |
|
|
|
2. |
INSPECT BACK DOOR LOCK WITH COURTESY LIGHT SWITCH ASSEMBLY |
Click here
| NG |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK WITH COURTESY LIGHT SWITCH ASSEMBLY - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND) |
(a) Disconnect the V3 back door lock with courtesy light switch assembly connector.
(b) Disconnect the 8H power distribution box assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
V3-1 (ACT+) - 8H-32 |
Always |
Below 1 Ω |
|
V3-3 (D+) - 8H-5 |
Always |
Below 1 Ω |
|
V3-2 (ACT-) - Body ground |
Always |
Below 1 Ω |
|
V3-1 (ACT+) - Body ground |
Always |
10 kΩ or higher |
|
8H-32 - Body ground |
Always |
10 kΩ or higher |
|
V3-3 (D+) - Body ground |
Always |
10 kΩ or higher |
|
8H-5 - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
INSPECT POWER DISTRIBUTION BOX ASSEMBLY |
(a) Remove the power distribution box assembly.
Click here
(b) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
(c) Measure the resistance according to the value(s) in the table below.
|
*a |
Component without harness connected (Power Distribution Box Assembly) |
- |
- |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
MB-19 (BCTY) - 8H-5 |
Always |
Below 1 Ω |
| NG |
|
|
|
5. |
CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - BATTERY AND BODY GROUND) |
(a) Disconnect the 8J power distribution box assembly connectors.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
8J-1 - Body ground |
Ignition switch off |
11 to 14 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
6. |
REPLACE POWER DISTRIBUTION BOX ASSEMBLY |
Click here
|
|
7. |
CHECK BACK DOOR OPEN OPERATION |
(a) Check that the back door open function operates.
| OK |
|
END |
| NG |
|
|
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