Toyota Corolla Cross: All Doors LOCK/UNLOCK Functions do not Operate Via Door Key Cylinder
DESCRIPTION
The main body ECU (multiplex network body ECU) receives door key cylinder lock or unlock switch signals from the front door lock with motor assembly (for driver door). The main body ECU (multiplex network body ECU) activates the door lock motor on each door according to these signals.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
If the main body ECU (multiplex network body ECU) is replaced, refer to the Registration.*
- for HEV Model: Click here
.gif)
- for Gasoline Model: Click here
- *: w/ Start Key System
PROCEDURE
|
1. | READ VALUE USING GTS (DOOR LOCK SWITCH STATUS BY A MECHANICAL KEY) |
(a) Read the Data List according to the display on the GTS.
Body Electrical > Main Body > Data List|
Tester Display | Measurement Item |
Range | Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Door Lock Switch Status by a Mechanical Key (D/P Door) |
Driver door key-linked 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 |
- |
| Door Unlock Switch Status by a Mechanical Key (D Door) |
Driver door key-linked 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 |
- |
|
Tester Display |
|---|
| Door Lock Switch Status by a Mechanical Key (D/P Door) |
|
Door Unlock Switch Status by a Mechanical Key (D Door) |
OK:
On the GTS screen, ON or OFF is displayed for each item according to the table above.
| OK | .gif) | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
|
.gif)
| 2. |
INSPECT FRONT DOOR LOCK WITH MOTOR ASSEMBLY (for Driver Door) |
Click here
| NG | | REPLACE FRONT DOOR LOCK WITH MOTOR ASSEMBLY (for Driver Door) |
|
| 3. |
CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND) |
(a) Disconnect the L4 front door lock with motor assembly LH connector.
(b) Disconnect the I85 main body ECU (multiplex network body ECU) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
L4-9 (L) - I85-28 (L2) |
Always | Below 1 Ω |
|
L4-10 (UL) - I85-4 (UL3) |
Always | Below 1 Ω |
|
L4-7 (E) - Body ground |
Always | Below 1 Ω |
|
L4-9 (L) - Body ground |
Always | 10 kΩ or higher |
|
I85-28 (L2) - Body ground |
Always | 10 kΩ or higher |
|
L4-10 (UL) - Body ground |
Always | 10 kΩ or higher |
|
I85-4 (UL3) - Body ground |
Always | 10 kΩ or higher |
| OK | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch
DESCRIPTION The main body ECU (multiplex network body ECU) receives switch signals from the multiplex network master switch assembly via LIN communication system. The main body ECU (multiplex network
All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch
DESCRIPTION The main body ECU (multiplex network body ECU) receives switch signals from the door control switch assembly. The main body ECU (multiplex network body ECU) activates the door lock motor o
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
SEE MORE:
Power Steering ECU Communication Stop Mode
DESCRIPTION
Detection Item
Symptom
Trouble Area
Power Steering ECU Communication Stop Mode
Communication stop for "Power Steering (EPS)" is indicated on the "Communication
Bus Check" screen of the GTS.
Click her
Right Rear Wheel Speed Sensor Circuit Short to Battery (C051212)
DESCRIPTION
Each speed sensor detects wheel speed and sends signals to the
skid control ECU (brake actuator assembly). These signals are used by the brake
control.
The speed sensor detects the magnetic fields of the speed sensor
rotor as it rotates and outputs a pulse signal.
The frequency
