| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001HA7B |
| Model Year Start: 2020 | Model: GR Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM (for Sedan, Gasoline Model): All Doors LOCK/UNLOCK Functions do not Operate Via Door Key Cylinder; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022] | ||
|
All Doors LOCK/UNLOCK Functions do not Operate Via Door Key Cylinder |
DESCRIPTION
The main body ECU (multiplex network body ECU) receives driver door or front passenger door* key cylinder lock or unlock switch signals from the front door lock with motor assembly. The main body ECU (multiplex network body ECU) activates the door lock motor on each door according to these signals.
- *: w/o Wireless Door Lock Control System
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*
Click here
![2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION](/t3Portal/stylegraphics/info.gif)
- *: w/ Smart Key System
PROCEDURE
|
1. |
CHECK DOOR LOCK OPERATION |
(a) Proceed to the next step according to the symptom if all the doors cannot be locked/unlocked.
|
Result |
Proceed to |
|---|---|
|
All doors cannot be locked/unlocked by using door key cylinder on driver door. |
A |
|
All doors cannot be locked/unlocked by using door key cylinder on front passenger door. (w/o Wireless Door Lock Control System) |
B |
|
All doors cannot be locked/unlocked by using both driver door and front passenger door key cylinders. (w/o Wireless Door Lock Control System) |
C |
| B |
|
| C |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
|
|
2. |
READ VALUE USING TECHSTREAM (DOOR KEY SW-LOCK, D DOOR KEY SW-UL) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Main Body > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Door Key SW-Lock |
Driver door key-linked lock / unlock switch lock signal |
OFF or ON |
OFF: Driver door key cylinder not turned to lock position ON: Driver door key cylinder turned to lock position |
- |
|
D Door Key SW-UL |
Driver door key-linked lock / unlock switch unlock signal |
OFF or ON |
OFF: Driver door key cylinder not turned to unlock position ON: Driver door key cylinder turned to unlock position |
- |
Body Electrical > Main Body > Data List
|
Tester Display |
|---|
|
Door Key SW-Lock |
|
D Door Key SW-UL |
OK:
The Techstream display changes correctly in response to the lock/unlock operation.
| OK |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
|
|
3. |
INSPECT FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH |
(a) Remove the front door lock with motor assembly LH.
Click here
(b) Inspect the front door lock with motor assembly LH.
Click here
| NG |
|
REPLACE FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND) |
(a) Disconnect the I84 main body ECU (multiplex network body ECU) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L4-9 (L) - I84-18 (L2) |
Always |
Below 1 Ω |
|
L4-10 (UL) - I84-17 (UL3) |
Always |
Below 1 Ω |
|
L4-7 (E) - Body ground |
Always |
Below 1 Ω |
|
L4-9 (L) or I84-18 (L2) - Other terminals and body ground |
Always |
10 kΩ or higher |
|
L4-10 (UL) or I84-17 (UL3) - Other terminals and body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
READ VALUE USING TECHSTREAM (DOOR KEY SW-LOCK, D DOOR KEY SW-UNLOCK) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Main Body > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Door Key SW-Lock |
Front passenger door key-linked lock / unlock switch lock signal |
OFF or ON |
OFF: Front passenger door key cylinder not turned to lock position ON: Front passenger door key cylinder turned to lock position |
- |
|
Door Key SW-Unlock |
Front passenger door key-linked lock/unlock switch unlock signal |
OFF or ON |
OFF: Front passenger door key cylinder not turned to lock position ON: Front passenger door key cylinder turned to lock position |
- |
Body Electrical > Main Body > Data List
|
Tester Display |
|---|
|
Door Key SW-Lock |
|
Door Key SW-Unlock |
OK:
The Techstream display changes correctly in response to the lock/unlock operation.
| OK |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
|
|
6. |
INSPECT FRONT DOOR LOCK WITH MOTOR ASSEMBLY RH |
(a) Remove the front door lock with motor assembly RH.
Click here
(b) Inspect the front door lock with motor assembly RH.
Click here
| NG |
|
REPLACE FRONT DOOR LOCK WITH MOTOR ASSEMBLY RH
|
|
|
7. |
CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK WITH MOTOR ASSEMBLY RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND) |
(a) Disconnect the I84 main body ECU (multiplex network body ECU) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K5-6 (L) - I84-18 (L2) |
Always |
Below 1 Ω |
|
K5-5 (UL) - I84-19 (UL2) |
Always |
Below 1 Ω |
|
K5-8 (E) - Body ground |
Always |
Below 1 Ω |
|
K5-6 (L) or I84-18 (L2) - Other terminals and body ground |
Always |
10 kΩ or higher |
|
K5-5 (UL) or I84-19 (UL2) - Other terminals and body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|