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).
Click here
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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 |
