Toyota Corolla Cross: Terminals Of Ecu
TERMINALS OF ECU
NOTICE:
- After the ignition switch is turned off, there may be a waiting time before
disconnecting the negative (-) auxiliary battery terminal.
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- When disconnecting and reconnecting the auxiliary battery.
HINT:
When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
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CHECK POWER DISTRIBUTION BOX ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
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|
*1 |
Power Distribution Box Assembly |
*2 |
Main Body ECU (Multiplex Network Body ECU) |
(b) Connect the power distribution box assembly connectors.
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(c) Measure the voltage and resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
MB-13 (GND1) - Body ground |
Ground |
Always |
Below 1 Ω |
|
MB-14 (GND2) - Body ground |
|||
|
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 off |
Below 1 V |
|
Ignition switch ON |
11 to 14 V |
(d) Install the main body ECU (multiplex network body ECU).
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(e) Measure the voltage and check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
8E-5 - Body ground |
CXPI communication line |
Ignition switch ON |
Pulse generation |
|
8F-43 - Body ground |
Rear window defogger signal (output) |
Rear window defogger switch off |
Below 1.5 V |
|
Rear window defogger switch on |
8 to 14 V |
||
|
8B-2 - Body ground |
Mirror heater drive signal (output) |
Rear window defogger switch off |
Below 1.5 V |
|
Rear window defogger switch on |
8 to 14 V |
READ NEXT:
Fail-safe Chart
FAIL-SAFE CHART
CXPI COMMUNICATION FAIL-SAFE
(a) When there is a CXPI communication malfunction (communication stop), each
load operates as follows.
Power distribution box assembly
Lo
Data List / Active Test
DATA LIST / ACTIVE TEST
READ 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 d
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
CXPI Communication System
DTC No.
Detection Item
Link
B235587
Power Distribution Box Missing Message
SEE MORE:
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Rear Differential Side Gear Shaft Oil Seal
Components
COMPONENTS
ILLUSTRATION
*1
REAR DRIVE SHAFT OIL SEAL
-
-
●
Non-reusable part
MP grease
Replacement
REPLACEMENT
CAUTION / NOTICE / HINT
The necessary procedures (adjustment,
