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.
Click here
.gif)
- 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.
Click here
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.
Click here
|
*1 |
Power Distribution Box Assembly |
*2 |
Main Body ECU (Multiplex Network Body ECU) |
(b) Connect the power distribution box assembly connectors.
Click here
(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).
Click here
(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 |
