| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001GXJ4 |
| Model Year Start: 2020 | Model: GR Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: LIGHTING (INT): LIGHTING SYSTEM (for Gasoline Model): Back Door Courtesy Switch Circuit; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022] | ||
|
Back Door Courtesy Switch Circuit |
DESCRIPTION
The main body ECU (multiplex network body ECU) receives a back door open/closed signal from back door courtesy light switch (back door lock assembly).
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. |
READ VALUE USING TECHSTREAM |
(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 |
|---|---|---|---|---|
|
Back Door Courtesy SW |
Back door courtesy switch signal |
OFF or ON |
OFF: Back door closed ON: Back door open |
- |
Body Electrical > Main Body > Data List
|
Tester Display |
|---|
|
Back Door Courtesy SW |
OK:
Normal conditions listed above are displayed.
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
|
2. |
INSPECT BACK DOOR COURTESY LIGHT SWITCH (BACK DOOR LOCK ASSEMBLY) |
(a) Remove the back door courtesy light switch (back door lock assembly).
Click here
(b) Inspect the back door courtesy light switch (back door lock assembly).
Click here
| NG |
|
REPLACE BACK DOOR COURTESY LIGHT SWITCH (BACK DOOR LOCK ASSEMBLY) |
|
|
3. |
CHECK HARNESS AND CONNECTOR (BACK DOOR COURTESY LIGHT SWITCH (BACK DOOR LOCK ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND BODY GROUND) |
(a) Disconnect the 4A instrument panel junction block assembly connector.
(b) Measure the resistance according to the value (s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
V3-3 (D+) - 4A-34 |
Always |
Below 1 Ω |
|
V3-3 (D+) or 4A-34 - Body ground |
Always |
10 kΩ or higher |
|
V3-2 (ACT-) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
|
*a |
Component without harness connected (Instrument Panel Junction Block Assembly) |
- |
- |
(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
Click here
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
4A-34 - MB-4 (BCTY) |
Always |
Below 1 Ω |
| OK |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
| NG |
|
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
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