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
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 deciding whether a p
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Wiper and Washer System
DTC No. Detection Item
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
SEE MORE:
Precaution
PRECAUTION
PRECAUTIONS FOR DISCONNECTING CABLE FROM NEGATIVE (-) AUXILIARY
BATTERY TERMINAL
NOTICE:
After the ignition switch is turned off, there may be a waiting time
before disconnecting the negative (-) auxiliary battery terminal.
Click here
HINT:
When disconnecting and reco
Fail-safe Chart
FAIL-SAFE CHART
FAIL-SAFE CHART
(a) When the skid control ECU (brake actuator assembly) detects
a solenoid valve malfunction or abnormal signal from a sensor, the brake actuator
assembly cuts power and sends a signal indicating a malfunction of the electronically
controlled brake system to t
