TERMINALS OF ECU
1. CHECK COMBINATION METER ASSEMBLY
(a) Measure the resistance and voltage according to the value(s) in the table below.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
C9-19 (B) - Body ground |
P - Body ground |
Battery power supply |
Always |
11 to 14 V |
C9-20 (IG+) - Body ground |
BE - Body ground |
Ignition switch power supply |
Ignition switch ON |
11 to 14 V |
Ignition switch off |
Below 1 V |
|||
C9-17 (EP) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
C9-18 (ES) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
C9-1 (CANH) - Body ground |
G - Body ground |
CAN communication line |
Always |
200 Ω or higher |
C9-2 (CANL) - Body ground |
W - Body ground |
CAN communication line |
Always |
200 Ω or higher |
2. CHECK CENTER AIRBAG SENSOR ASSEMBLY
Terminal No. |
Terminal Symbol |
Destination |
---|---|---|
A23-12 |
FSR+ |
Occupant classification ECU |
A23-13 |
FSR- |
Occupant classification ECU |
A22-11 |
LBE+ |
Front seat inner belt assembly (for driver side) |
A22-12 |
LBE- |
Front seat inner belt assembly (for driver side) |
3. CHECK OCCUPANT CLASSIFICATION ECU
(a) Measure the voltage and check for pulses according to the value(s) in the table below.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
O5-1 (+B) - O5-3 (GND) |
R - W-B |
Battery power supply |
Always |
11 to 14 V |
O5-2 (DIA) - O5-3 (GND) |
W - W-B |
Diagnosis (DLC3) |
Ignition switch ON |
Pulse generation |
O5-3 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 V |
O5-7 (IG) - O5-3 (GND) |
BE - W-B |
Ignition switch power supply |
Ignition switch ON |
11 to 14 V |
O5-8 (FSR+) - O5-4 (FSR-) |
W - B |
Center airbag sensor assembly communication line |
Ignition switch ON |
Pulse generation |
O5-9 (BSW) - O5-5 (BGND) |
G - P-G |
Front passenger side buckle switch line |
Always |
4 to 14 V |
O4-1 (SGD1) - O5-3 (GND) |
L - W-B |
Front occupant classification sensor LH ground line |
Always |
Below 1 V |
O4-2 (SGD2) - O5-3 (GND) |
BE - W-B |
Front occupant classification sensor RH ground line |
Always |
Below 1 V |
O4-3 (SGD3) - O5-3 (GND) |
P-G - W-B |
Rear occupant classification sensor LH ground line |
Always |
Below 1 V |
O4-4 (SGD4) - O5-3 (GND) |
B-R - W-B |
Rear occupant classification sensor RH ground line |
Always |
Below 1 V |
O4-11 (SVC1) - O4-1 (SGD1) |
B-L - L |
Front occupant classification sensor LH power supply line |
Ignition switch ON, a load applied to front occupant classification sensor LH |
4.9 to 5.1 V |
O4-12 (SVC2) - O4-2 (SGD2) |
LG-B - BE |
Front occupant classification sensor RH power supply line |
Ignition switch ON, a load applied to front occupant classification sensor RH |
4.9 to 5.1 V |
O4-5 (SVC3) - O4-3 (SGD3) |
B - P-G |
Rear occupant classification sensor LH power supply line |
Ignition switch ON, a load applied to rear occupant classification sensor LH |
4.9 to 5.1 V |
O4-6 (SVC4) - O4-4 (SGD4) |
GR-L - B-R |
Rear occupant classification sensor RH power supply line |
Ignition switch ON, a load applied to rear occupant classification sensor RH |
4.9 to 5.1 V |
O4-7 (SIG1) - O4-1 (SGD1) |
G - L |
Front occupant classification sensor LH signal line |
Ignition switch ON, a load applied to front occupant classification sensor LH |
0 to 5.1 V |
O4-8 (SIG2) - O4-2 (SGD2) |
R-L - BE |
Front occupant classification sensor RH signal line |
Ignition switch ON, a load applied to front occupant classification sensor RH |
0 to 5.1 V |
O4-9 (SIG3) - O4-3 (SGD3) |
R-B - P-G |
Rear occupant classification sensor LH signal line |
Ignition switch ON, a load applied to rear occupant classification sensor LH |
0 to 5.1 V |
O4-10 (SIG4) - O4-4 (SGD4) |
L-R - B-R |
Rear occupant classification sensor RH signal line |
Ignition switch ON, a load applied to rear occupant classification sensor RH |
0 to 5.1 V |
Removal
REMOVAL
PROCEDURE
1. PRECAUTION
NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting
the cable from the negative (-) battery terminal. Therefore, make sure to read the
disconnecting the cable from the negative (-) battery terminal notices before pr ...
Reassembly
REASSEMBLY
PROCEDURE
1. INSPECT CENTER NO. 2 SUPPORT BEARING ASSEMBLY
(a) When turning the center No. 2 support bearing assembly with your hand, check
that it turns smoothly without catching and that there are no cracks or damage.
If there are any defects, replace it.
2. INSTALL CENTER NO. ...
Vehicle data recordings
Your Toyota is equipped with several sophisticated computers that will record
certain data, such as: • Engine speed
• Accelerator status
• Brake status
• Vehicle speed
• Shift position (except manual transmission)
The recorded data varies according to the vehicle grade level and opt ...