Toyota Corolla Cross: Lock Function does not Operate (Close &)
DESCRIPTION
The back door control switch signal is sent to the multiplex network door ECU. If the power back door system does not operate when the back door control switch is operated, the back door control switch circuit may be malfunctioning.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- If the replacement, removal and installation of the multiplex network door ECU or disconnection of the connectors of the multiplex network door ECU has been performed, initialize the power back door system.
Click here
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- Check the smart key system (for Entry Function) first before troubleshooting the power back door system.
for HEV Model: Click here
for Gasoline Model: Click here
PROCEDURE
|
1. | READ VALUE USING GTS |
(a) Read the Data List according to the display on the GTS.
Body Electrical > Back Door > Data List|
Tester Display | Measurement Item |
Range | Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Close and Lock Switch | Back door control switch signal |
OFF or ON | ON: Back door control switch pressed OFF: Back door control switch not pressed |
- |
|
Tester Display |
|---|
| Close and Lock Switch |
OK:
The display is as specified in the normal condition column.
| OK | .gif) | REPLACE MULTIPLEX NETWORK DOOR ECU |
|
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| 2. |
INSPECT BACK DOOR CONTROL SWITCH |
Click here
| NG | |
REPLACE BACK DOOR CONTROL SWITCH |
|
| 3. |
CHECK HARNESS AND CONNECTOR (BACK DOOR CONTROL SWITCH - MULTIPLEX NETWORK DOOR ECU AND BODY GROUND) |
(a) Disconnect the U39 multiplex network door ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
U12-5 (MSW) - U39-4 (CLSW) |
Always | Below 1 Ω |
|
U12-2 (MSE) - Body ground |
Always | Below 1 Ω |
|
U12-5 (MSW) or U39-4 (CLSW) - Body ground |
Always | 10 kΩ or higher |
| OK | | REPLACE MULTIPLEX NETWORK DOOR ECU |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
