Toyota Corolla Cross: Terminals Of Ecu
TERMINALS OF ECU
CHECK POWER DISTRIBUTION BOX ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
(a) Remove the main body ECU (multiplex network body ECU).
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|
*1 | Power Distribution Box Assembly |
*2 | Main Body ECU (Multiplex Network Body ECU) |
(b) Reconnect 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 |
Condition | Specified Condition |
|---|---|---|---|
|
MB-13 (GND1) - 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 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 |
Condition | Specified Condition |
|---|---|---|---|
|
8F-8 - Body ground |
Rear RH seat belt buckle switch signal |
Rear RH seat belt fastened |
11 to 14 V |
|
Rear RH seat belt not fastened |
Below 1 V | ||
|
8F-19 - Body ground |
Rear LH seat belt buckle switch signal |
Rear LH seat belt fastened |
11 to 14 V |
|
Rear LH seat belt not fastened |
Below 1 V | ||
|
8F-4 - Body ground |
Rear center seat belt buckle switch signal |
Rear center seat belt fastened |
11 to 14 V |
|
Rear center seat belt not fastened |
Below 1 V | ||
|
8F-1 - Body ground | Rear RH door courtesy light switch signal |
Rear window defogger switch off |
10 kΩ or higher → below 1 Ω |
|
8F-28 - Body ground | Rear LH door courtesy light switch signal |
Rear window defogger switch on |
10 kΩ or higher → below 1 Ω |
CHECK COMBINATION METER ASSEMBLY
(a) Disconnect the I4 and I5 combination meter assembly connectors.
(b) Measure the resistance and voltage 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 |
Condition | Specified Condition |
|---|---|---|---|
|
I4-5 (B) - Body ground |
Power source for auxiliary battery |
Always | 11 to 14 V |
|
I4-6 (IG+) - Body ground |
Ignition power supply |
Ignition switch off | Below 1 V |
|
Ignition switch ON | 11 to 14 V | ||
|
I4-2 (ES) - Body ground |
Ground | Always |
Below 1 Ω |
|
I4-29 (BKL) - Body ground |
Driver side seat belt buckle switch signal |
Driver side seat belt fastened |
1 MΩ or higher |
|
Driver side seat belt unfastened |
Below 1 Ω |
AIRBAG ECU ASSEMBLY
|
Terminal No. | Terminal Symbol |
Destination |
|---|---|---|
| O17-27 |
RBE+ | Front seat inner belt assembly RH |
|
O17-18 | GNDR |
Front seat inner belt assembly RH |
|
O17-24 | SVC |
Occupant classification sensor |
|
O17-31 | SGD |
Occupant classification sensor |
|
O17-32 | SIG |
Occupant classification sensor |
READ NEXT:
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE:
In the following table, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whethe
On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE
1. INSPECT DRIVER SEAT BELT WARNING LIGHT HINT: The seat belt warning light on the combination meter assembly is used for both the driver seat and front passenger sea
Driver Side Seat Belt Warning Light does not Operate
DESCRIPTION The combination meter assembly blinks or turns off the seat belt warning light on the combination meter assembly in accordance with the state of the front seat inner belt assembly LH. WIRI
SEE MORE:
Utility
UTILITY WRITE VIN/VEHICLE IDENTIFICATION NUMBER
NOTICE:
When the airbag sensor assembly is replaced, it is necessary to write the VIN/Vehicle Identification Number.
Since the VIN information of the airbag sensor assembly is acquired via ECM, it is necessary to first write the VIN of ECM.
Inspection
INSPECTION
PROCEDURE
1. INSPECT SHIFT LOCK CONTROL ECU (w/ Smart Key System)
HINT:
If the results of the following inspections are as specified but a malfunction
has occurred, replace the shift lock control unit assembly.
(a) Inspect wire harness:
(1) Disconnect the shift lock con
