Toyota Corolla Cross: Terminals Of Ecu
TERMINALS OF ECU
CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND POWER DISTRIBUTION BOX ASSEMBLY
|
*1 | Power Distribution Box Assembly |
*2 | Main Body ECU (Multiplex Network Body ECU) |
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
(b) 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 source | Ignition switch off |
Below 1 V |
|
Ignition switch ON | 11 to 14 V | ||
|
MB-13 (GND1)- Body ground |
Ground | Always |
Below 1 Ω |
(c) Install the main body ECU (multiplex network body ECU) to power distribution box assembly.
(d) Measure the voltage and check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
I85-11 (RWRY) - Body ground*1 |
Rear wiper motor assembly operation signal |
Rear wiper motor assembly stopped |
11 to 14 V |
|
Rear wiper motor assembly operating |
Below 1 V | ||
|
8E-5 (CXPI) - Body ground |
CXPI communication line |
Ignition switch ON |
Pulse generation |
|
Less than approximately 100 seconds after ignition switch turned off | |||
|
Approximately 100 seconds or more after ignition switch turned off |
11 to 14 V | ||
|
I85-6 (WPS) - Body ground |
WIPER Relay operation signal |
Ignition switch ON |
11 to 14 V |
|
Less than approximately 60 seconds after ignition switch turned off | |||
|
Approximately 60 seconds or more after ignition switch turned off |
Below 1 V |
- *1: w/ Rear Wiper System
CHECK WINDSHIELD WIPER RELAY ASSEMBLY
(a) Disconnect the A55 and A56 windshield wiper relay assembly connectors.
(b) Measure the voltage and resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
A55-3 (E) - Body ground |
Ground | Always |
Below 1 Ω |
|
A55-5 (EWS) - Body ground |
Ground | Always |
Below 1 Ω |
|
A55-6 (IGWS) - Body ground |
Washer circuit IG power source |
Ignition switch off | Below 1 V |
|
Ignition switch ON | 11 to 14 V | ||
|
A55-8 (+B) - Body ground |
Ignition switch ON signal (Power source circuit) |
Ignition switch ON |
11 to 14 V |
|
Less than approximately 60 seconds after ignition switch turned off | |||
|
Approximately 60 seconds or more after ignition switch turned off |
Below 1 V | ||
|
A56-5 (ES) - Body ground |
Ground | Always |
Below 1 Ω |
(c) Connect the A55 and A56 windshield wiper relay assembly connectors.
(d) Measure the voltage and resistance and check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
A55-1 (+WR) - Body ground |
Front washer operation signal |
Ignition switch ON, front washer operating |
11 to 14 V |
|
A55-2 (+1) - Body ground |
LO operation signal to windshield wiper motor assembly |
Ignition switch ON, windshield wiper motor assembly operating in LO |
11 to 14 V |
|
A55-4 (+2) - Body ground |
HI operation signal to windshield wiper motor assembly |
Ignition switch ON, windshield wiper motor assembly operating in HI |
11 to 14 V |
|
A55-7 (-WR) - Body ground |
Ground | Always |
Below 1 Ω |
|
A56-3 (2S) - Body ground |
Windshield wiper motor assembly HI operation signal |
Windshield wiper motor assembly stopped |
4.5 to 5.5 V |
|
Windshield wiper motor assembly operating in HI |
Below 1 V | ||
|
A56-4 (MPX1) - Body ground |
CXPI communication line |
Ignition switch ON |
Pulse generation |
|
Less than approximately 100 seconds after ignition switch turned off | |||
|
Approximately 100 seconds or more after ignition switch turned off |
11 to 14 V | ||
|
A56-6 (+SM) - Body ground |
Windshield wiper motor assembly position detection signal |
Windshield wiper motor assembly in LO or HI operation |
Below 1 V ←→ 11 to 14 V |
|
Windshield wiper motor assembly stopped |
Below 1 V |
READ NEXT:
Data List / Active Test
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DTC Output from Link
B235787 Wiper Module Missing Message
Main Body
Wiper Module Missing Message (B235787)
DESCRIPTION The main body ECU (multiplex network body ECU) and windshield wiper relay assembly communicate via CXPI communication. The main body ECU (multiplex network body ECU) stores this DTC if com
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This section offers drivers thorough direction and guidelines to guarantee the longevity, dependability, and peak performance of their car. This part equips owners with the knowledge and skills necessary to maintain and extend the life of their vehicle by covering a wide range of routine maintenance
