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).
Click here
(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
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