Toyota Corolla Cross: Power Back Door does not Operate Using Outside Switch
DESCRIPTION
The No. 1 power back door control switch signal is sent to the multiplex network door ECU.
If the power back door does not operate using the No. 1 power back door control switch, a No. 1 power back door control switch circuit malfunction is a possible cause.
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.
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PROCEDURE
| 1. |
CHECK VEHICLE CONDITION |
(a) Check that the power back door function on the multi-information display in the combination meter assembly is set to ON.
Click here
|
Result | Proceed to |
|---|---|
|
Power back door function on the multi-information display in the combination meter assembly is set to ON (power back door system operation is permitted) |
A |
| Power back door function on the multi-information display in the combination meter assembly is set to OFF (power back door system operation is prohibited) |
B |
| B |
.gif) | SET POWER BACK DOOR FUNCTION TO ON (PERMIT POWER BACK DOOR SYSTEM OPERATION) |
|
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| 2. |
CHECK POWER BACK DOOR SYSTEM CONDITION |
(a) Check the power back door system condition.
|
Result | Proceed to |
|---|---|
|
The malfunction symptom reproduces |
A |
| The malfunction symptom does not reproduce |
B |
| B |
| GO TO POWER BACK DOOR CANNOT BE OPERATED FREQUENTLY |
|
| 3. |
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 |
|---|---|---|---|---|
|
PBD Close Switch | No. 1 power back door control switch signal |
ON or OFF | ON: No. 1 power back door control switch pushed OFF: No. 1 power back door control switch not pushed |
- |
|
Tester Display |
|---|
| PBD Close Switch |
OK:
The No. 1 power back door control switch functions as specified in the normal condition column.
| OK | | REPLACE MULTIPLEX NETWORK DOOR ECU |
|
| 4. |
INSPECT NO. 1 POWER BACK DOOR CONTROL SWITCH |
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| NG | | REPLACE NO. 1 POWER BACK DOOR CONTROL SWITCH |
|
| 5. |
CHECK HARNESS AND CONNECTOR (NO. 1 POWER BACK DOOR CONTROL SWITCH - MULTIPLEX NETWORK DOOR ECU AND BODY GROUND) |
(a) Disconnect the U38 No. 1 power back door control switch connector.
(b) Disconnect the U39 multiplex network door ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
U38-5 (CLS) - U39-14 (BDDN) |
Always | Below 1 Ω |
|
U38-2 (E) - Body ground |
Always | Below 1 Ω |
|
U38-5 (CLS) or U39-14 (BDDN) - Body ground |
Always | 10 kΩ or higher |
| OK | | REPLACE MULTIPLEX NETWORK DOOR ECU |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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DESCRIPTION
The alternator performs self-diagnosis of its internal circuits to detect malfunctions
(open or short circuits).
The ECM receives the result via LIN communication and stores a DTC.
DTC No.
Detection Item
DTC Detection Condition
Trouble Are
Inspection
INSPECTION PROCEDURE 1. INSPECT STEERING WHEEL SWITCH HOUSING
(a) Resistance Check.
*a Component without harness connected
(Steering Wheel Switch Housing)
- -
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance: Light Switch Circuit
