Toyota Corolla Cross: Terminals Of Ecu
TERMINALS OF ECU
CHECK MULTIPLEX NETWORK DOOR ECU
(a) Disconnect the U39, U40, U41 and U42 multiplex network door ECU connectors.
(b) Measure the voltage and resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
U39-9 (IG) - Body ground |
IG power supply | Ignition switch ON |
11 to 14 V |
|
Ignition switch off | Below 1 V | ||
|
U39-7 (ECUB) - Body ground |
Auxiliary battery power supply |
Ignition switch off | 11 to 14 V |
|
U41-5 (B) - Body ground |
Auxiliary battery power supply |
Ignition switch off | 11 to 14 V |
|
U42-4 (GND) - Body ground |
Body ground | Always |
Below 1 Ω |
(c) Reconnect the U39, U40, U41 and U42 multiplex network door ECU connectors.
(d) Measure the voltage and waveform according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
U40-13 (DS1) - Body ground |
Power back door unit assembly LH (door sensor) signal |
Power back door not operating |
0 V or more than 7 V |
|
Power back door operating |
Pulse generation (See waveform 1) | ||
|
U40-5 (DS2) - Body ground |
Power back door unit assembly LH (door sensor) signal |
Power back door not operating |
0 V or more than 7 V |
|
Power back door operating |
Pulse generation (See waveform 2) | ||
|
U40-6 (DS12) - Body ground |
Power back door unit assembly RH (door sensor) signal |
Power back door not operating |
0 V or more than 7 V |
|
Power back door operating |
Pulse generation (See waveform 1) | ||
|
U40-12 (DS22) - Body ground |
Power back door unit assembly RH (door sensor) signal |
Power back door not operating |
0 V or more than 7 V |
|
Power back door operating |
Pulse generation (See waveform 2) | ||
|
U40-3 (DSV2) - Body ground |
Power back door unit assembly RH (door sensor) power supply |
Always | 7 V or higher |
|
U40-8 (OSR) - U40-9 (OSE) |
Power back door sensor assembly RH signal |
Power back door sensor assembly RH not pressed |
2 to 3 V |
| Power back door sensor assembly RH pressed |
Below 1 V | ||
|
U39-14 (BDDN) - Body ground |
No. 1 power back door control switch signal |
No. 1 power back door control switch on |
Below 1 V |
|
No. 1 power back door control switch off |
Pulse generation | ||
|
U39-4 (CLSW) - Body ground |
Back door control switch signal |
Back door control switch on |
Below 1 V |
|
Back door control switch off |
11 to 14 V | ||
|
U39-3(FUL) - Body ground |
Back door lock with courtesy light switch assembly input |
Back door open | Below 1 V |
|
Back door closed | Pulse generation | ||
|
U39-5(HAF) - Body ground |
Back door lock with courtesy light switch assembly lock signal |
Back door closed | 11 to 14 V |
|
Back door fully open |
Below 1 V | ||
|
U39-11(LIB) - Body ground |
Back door lock with courtesy light switch assembly lock signal |
Back door is locked | 11 to 14 V |
|
Back door is unlocked |
Below 1 V | ||
|
U39-13(PAWL) - Body ground |
Back door lock with courtesy light switch assembly lock signal |
Back door fully open |
11 to 14 V |
|
Back door ajar | Below 1 V | ||
|
Back door closed | 11 to 14 V | ||
|
Operation complete | Below 1 V | ||
|
U39-15(POS) - Body ground |
Back door lock with courtesy light switch assembly signal |
Back door open | Below 1 V |
|
Back door closer operating |
11 to 14 V | ||
|
Operation complete | Below 1 V | ||
|
U42-1 (CTYO) - Body ground |
Back door lock signal |
Back door is locked | Below 1 V |
|
Back door is unlocked |
11 to 14 V | ||
|
U39-1 (BZR+) - Body ground |
Power back door warning buzzer signal |
Power back door warning buzzer sounding |
Pulse generation |
|
Power back door warning buzzer not sounding |
Below 1 V | ||
|
U40-10 (DSG2) - Body ground |
Power back door unit assembly RH (door sensor) ground |
Always | Below 1 V |
|
U40-11 (DSG) - Body ground |
Power back door unit assembly LH (door sensor) ground |
Always | Below 1 V |
|
U40-4 (DSV) - Body ground |
Power back door unit assembly LH (door sensor) power supply |
Always | 7 V or higher |
|
U40-1 (OSL) - U40-9 (OSE) |
Power back door sensor assembly LH signal |
Power back door sensor assembly LH not pressed |
2 to 3 V |
| Power back door sensor assembly LH pressed |
Below 1 V | ||
|
U42-2 (DC+) - U42-6 (DC-) |
Back door lock assembly (back door lock motor) circuit |
Back door lock motor operating |
11 to 14 V |
|
Back door lock motor not operating |
Below 1 V |
(1) Using an oscilloscope, check waveform 1.
Waveform 1 (Reference) |
Item | Condition |
|---|---|
|
Tester Connection |
|
| Tool setting |
2 V/DIV., 2 ms./DIV. |
|
Vehicle condition | Power back door operating |
HINT:
The period changes in accordance to the speed at which the power back door is opened and closed.
(2) Using an oscilloscope, check waveform 2.
Waveform 2 (Reference)|
Item | Condition |
|---|---|
|
Tester Connection |
|
| Tool setting |
2 V/DIV., 2 ms./DIV. |
|
Vehicle condition | Power back door operating |
HINT:
The period changes in accordance to the speed at which the power back door is opened and closed.
CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND POWER DISTRIBUTION BOX ASSEMBLY
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
Click here .gif)
(b) Connect the power distribution box assembly connectors.
(c) Measure the voltage and resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
MB-26 (BECU) - Body ground |
Auxiliary battery power supply |
Ignition switch off | 11 to 14 V |
|
MB-27 (IGR) - Body ground |
IG power supply | Ignition switch ON |
11 to 14 V |
|
Ignition switch off | Below 1 V | ||
|
MB-13 (GND1) - Body ground |
Body ground | Always |
Below 1 Ω |
|
MB-14 (GND2) - Body ground |
Body ground | Always |
Below 1 Ω |
(d) Install the main body ECU (multiplex network body ECU).
Click here
(e) Measure the voltage and waveform according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
8F-2 (BCTY) - Body ground |
Back door lock signal |
Back door closed | 11 to 14 V, or Pulse Output (Maximum 14 V)*1 |
|
Back door open | Below 1 V | ||
|
I86-3 (LSBO) - Body ground |
Back door lock signal |
Back door is locked | 11 to 14 V |
|
Back door is unlocked |
Below 1 V | ||
|
I86-21 (PBDS) - Body ground |
Power back door control switch signal |
Power back door control switch off |
Pulse generation |
|
Power back door control switch on |
Below 1 V | ||
|
8E-7 (BZR) - Body ground |
Wireless door lock buzzer signal |
Wireless door lock buzzer not operating |
Below 1 V |
|
Wireless door lock buzzer operating |
Pulse generation |
- *1: Differs depending on the vehicle model
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
for HEV Model: Click here
for Gasoline Model: Click here
READ NEXT:
Freeze Frame Data
FREEZE FRAME DATA FREEZE FRAME DATA (a) Whenever a DTC is detected, the multiplex network door ECU stores the current vehicle state as Freeze Frame Data.
CHECK FREEZE FRAME DATA (a) Enter the followi
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST HINT:
Using the GTS to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Power Back Door System
DTC No. Detection Item
Link B222049
Back Door Motor Internal Electronic Failure
B222631 PBD Unit Pulse Sensor
SEE MORE:
Positioning a floor jack
When using a floor jack, follow
the instructions in the
manual provided with the
jack and perform the operation
safely.
When raising your vehicle
with a floor jack, position
the jack correctly. Improper
placement may damage
your vehicle or cause injury.
Location of the jack point
■ Front
■ Rea
Inspection
INSPECTION
PROCEDURE
1. INSPECT FRONT DRIVE SHAFT ASSEMBLY
(a) Check that there is no excessive play in the radial direction of
the outboard joint.
(b) Check that the inboard joint slides smoothly in the thrust direction.
(c) Check t
