Toyota Tacoma (2015-2018) Service Manual: Terminals Of Ecu
TERMINALS OF ECU
1. OCCUPANT DETECTION ECU
|
Symbols (Terminal No.) |
Wiring Color |
Terminal Description |
Condition |
Specification |
|---|---|---|---|---|
|
+B (O5-1) - GND (O5-3) |
R - W-B |
Battery |
Ignition switch on |
10 to 14 V |
|
DIA (O5-2) - GND (O5-3) |
W - W-B |
Diagnosis (DLC3) |
Ignition switch on |
Pulse generation |
|
GND (O5-3) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
|
FSR- (O5-4) - GND (O5-3) |
B - W-B |
Airbag sensor assembly communication line (-) |
Always |
Below 1 Ω |
|
BGND (O5-5) - GND (O5-3) |
P-G - W-B |
Passenger side buckle switch ground line |
Always |
Below 1 Ω |
|
IG (O5-7) - GND (O5-3) |
BE - W-B |
Power source (IGN Fuse) |
Ignition switch on |
10 to 14 V |
|
FSR+ (O5-8) - FSR- (O5-4) |
W - B |
Airbag sensor assembly communication line |
Ignition switch on |
Pulse generation |
|
BSW (O5-9) - BGND (O5-5) |
G - P-G |
Passenger side buckle switch line |
Buckle switch ON Buckle switch OFF |
Pulse generation |
|
SGD1 (O4-1) - GND (O5-3) |
L - W-B |
Occupant classification sensor front LH ground line |
Always |
Below 1 Ω |
|
SGD2 (O4-2) - GND (O5-3) |
BE - W-B |
Occupant classification sensor front RH ground line |
Always |
Below 1 Ω |
|
SGD3 (O4-3) - GND (O5-3) |
P-G - W-B |
Occupant classification sensor rear LH ground line |
Always |
Below 1 Ω |
|
SGD4 (O4-4) - GND (O5-3) |
B-R - W-B |
Occupant classification sensor rear RH ground line |
Always |
Below 1 Ω |
|
SVC1 (O4-11) - SGD1 (O4-1) |
B-L - L |
Occupant classification sensor front LH power supply line |
Ignition switch on, a load is applied to occupant classification sensor front LH |
4.5 to 5.1 V |
|
SVC2 (O4-12) - SGD2 (O4-2) |
LG-B - BE |
Occupant classification sensor front RH power supply line |
Ignition switch on, a load is applied to occupant classification sensor front RH |
4.5 to 5.1 V |
|
SVC3 (O4-5) - SGD3 (O4-3) |
B -P-G |
Occupant classification sensor rear LH power supply line |
Ignition switch on, a load is applied to occupant classification sensor rear LH |
4.5 to 5.1 V |
|
SVC4 (O4-6) - SGD4 (O4-4) |
GR-L - B-R |
Occupant classification sensor rear RH power supply line |
Ignition switch on, a load is applied to occupant classification sensor rear RH |
4.5 to 5.1 V |
|
SIG1 (O4-7) - SGD1 (O4-1) |
G - L |
Occupant classification sensor front LH signal line |
Ignition switch on, a load is applied to occupant classification sensor front LH |
Pulse generation |
|
SIG2 (O4-8) - SGD2 (O4-2) |
R-L - BE |
Occupant classification sensor front RH signal line |
Ignition switch on, a load is applied to occupant classification sensor front RH |
Pulse generation |
|
SIG3 (O4-9) - SGD3 (O4-3) |
R-B - P-G |
Occupant classification sensor rear LH signal line |
Ignition switch on, a load is applied to occupant classification sensor rear LH |
Pulse generation |
|
SIG4 (O4-10) - SGD4 (O4-4) |
L-R - B-R |
Occupant classification sensor rear RH signal line |
Ignition switch on, a load is applied to occupant classification sensor rear RH |
Pulse generation |
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Proceed to the troubleshooting for each circuit in the table below.
Symptom
Suspected Area
See page
Passenger seat occ ...
Sleep Operation Failure of Occupant Classification ECU (B1796)
DESCRIPTION
During sleep mode, the occupant detection ECU monitors the condition of each
sensor while the ignition switch is off. In this mode, if the occupant detection
ECU detects an internal m ...
Other materials:
Open in One Side of Bus 5 Branch Line
DESCRIPTION
When the CAN bus main lines are normal (no open, short to ground, short to +B
or short between lines) and there is an ECU or sensor on the "Communication Bus
Check" screen that is indicated as not communicating or whose connection status
on the "Communication Bus Ch ...
Speaker Circuit
DESCRIPTION
If there is a short in a speaker circuit, the stereo component amplifier assembly*1
or navigation receiver assembly*2 detects it and stops output to the speakers.
Thus sound cannot be heard from the speakers even if there is no malfunction
in the stereo component amplifier assembly ...
Dtc Check / Clear
DTC CHECK / CLEAR
1. CHECK FOR TRANSPONDER KEY ECU ASSEMBLY DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Immobiliser / Trouble Codes.
(e) Check the details of the DTC(s) (See page
...
