Toyota Corolla Cross: Terminals Of Ecu
TERMINALS OF ECU
CHECK POWER DISTRIBUTION BOX ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
*1 |
Power Distribution Box Assembly |
*2 |
Main Body ECU (Multiplex Network Body ECU) |
(a) Remove main body ECU (multiplex network body ECU).
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(b) Connect the power distribution box assembly connectors.
(c) Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connectors disconnected.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
MB-13 (GND1) - Body ground |
Ground |
Always |
Below 1 Ω |
|
MB-14 (GND2) - Body ground |
Ground |
Always |
Below 1 Ω |
|
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 |
(d) Install main body ECU (multiplex network body ECU) connector.
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(e) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
8F-17 - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
|
8B-37 - Body ground*1 |
- *1: w/ Sliding Roof System
CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)
(a) Disconnect the L2 front power window regulator motor assembly (driver door) connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
L2-2 (B) - Body ground |
Auxiliary battery power supply |
Ignition switch off |
11 to 14 V |
|
L2-1 (GND) - Body ground |
Ground |
Always |
Below 1 Ω |
(c) Reconnect the L2 front power window regulator motor assembly (driver door) connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
L2-9 (LIN) - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR)
(a) Disconnect the K2 front power window regulator motor assembly (front passenger door) connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
K2-2 (B) - Body ground |
Auxiliary battery power supply |
Ignition switch off |
11 to 14 V |
|
K2-1 (GND) - Body ground |
Ground |
Always |
Below 1 Ω |
(c) Reconnect the K2 front power window regulator motor assembly (front passenger door) connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
K2-9 (LIN) - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
CHECK REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR)
(a) Disconnect the M2 rear power window regulator motor assembly (rear RH door) connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
M2-2 (B) - Body ground |
Auxiliary battery power supply |
Ignition switch off |
11 to 14 V |
|
M2-1 (GND) - Body ground |
Ground |
Always |
Below 1 Ω |
(c) Reconnect the M2 rear power window regulator motor assembly (rear RH door) connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
M2-9 (LIN) - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
CHECK REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR)
(a) Disconnect the N2 rear power window regulator motor assembly (rear LH door) connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
N2-2 (B) - Body ground |
Auxiliary battery power supply |
Ignition switch off |
11 to 14 V |
|
N2-1 (GND) - Body ground |
Ground |
Always |
Below 1 Ω |
(c) Reconnect the N2 rear power window regulator motor assembly (rear LH door) connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
N2-9 (LIN) - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY
(a) Disconnect the L7 multiplex network master switch assembly connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
L7-11 (B) - Body ground |
Auxiliary battery power supply |
Ignition switch off |
11 to 14 V |
|
L7-12 (GND) - Body ground |
Ground |
Always |
Below 1 Ω |
(c) Reconnect the L7 multiplex network master switch assembly connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
L7-17 (LIN1) - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
|
L7-16 (LIN2) - Body ground |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Smart Key System)
(a) Disconnect the I222 certification ECU (smart key ECU assembly) connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
I222-6 (+B) - Body ground |
Auxiliary battery power supply |
Ignition switch off |
11 to 14 V |
|
I222-29 (E) - Body ground |
Ground |
Always |
Below 1 Ω |
(c) Reconnect the I222 certification ECU (smart key ECU assembly) connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
I222-8 (LIN) - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
CHECK ID CODE BOX (IMMOBILISER CODE ECU) (w/ Smart Key System)
(a) Disconnect the I20 ID code box (immobiliser code ECU) connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
I20-1 (+B) - Body ground |
Auxiliary battery power supply |
Ignition switch off |
11 to 14 V |
|
I20-5 (GND) - Body ground |
Ground |
Always |
Below 1 Ω |
(c) Reconnect the I20 ID code box (immobiliser code ECU) connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
I20-2 (LIN1) - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) (w/ Sliding Roof System)
(a) Disconnect the T12 sliding roof ECU (sliding roof drive gear sub-assembly) connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
T12-1 (B) - Body ground |
Auxiliary battery power supply |
Ignition switch off |
11 to 14 V |
|
T12-2 (E) - Body ground |
Ground |
Always |
Below 1 Ω |
(c) Reconnect the T12 sliding roof ECU (sliding roof drive gear sub-assembly) connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
T12-7 (MPX1) - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
READ NEXT:
Diagnosis System
DIAGNOSIS SYSTEM
DESCRIPTION
The main body ECU (multiplex network body ECU) and certification ECU (smart key
ECU assembly) control the LIN communication system. LIN communication system data
and
Data List / Active Test
DATA LIST / ACTIVE TEST
DATA LIST
NOTICE:
In the table below, the values listed under "Normal Condition" are reference
values. Do not depend solely on these reference values when decidi
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
LIN Communication System
DTC No.
Detection Item
Link
B120687
P/W Master SW System Missing Message
SEE MORE:
Engine Stalls
DESCRIPTION
Problem Symptom Suspected Area
Trouble Area
Engine speed fluctuation due to abnormal combustion
Idle speed too low or high
Strong engine vibration due to above symptoms
Ignition malfunction
Deviation in air fuel ratio (Excessive or i
VEHICLE CONTROL HISTORY (RoB)
VEHICLE CONTROL HISTORY (RoB)
VEHICLE CONTROL HISTORY (CLEARANCE WARNING)
HINT:
Part of the control history can be confirmed using the vehicle control
history.
Click here
VEHICLE CONTROL HISTORY (AIRBAG)
HINT:
Part of the control history can be confirmed using the vehicle control
hist
