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:
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" column of the
table. Check each sy ...
Playing an audio CD and MP3/WMA/AAC discs
Insert disc or select “CD” on the “Select Audio Source” screen to begin listening
to a CD.
Audio control screen
1. “Select Audio Source” screen appears
2. Audio CD
Displaying the track list
MP3/WMA/AAC
Displaying the folder list
3. Random playback
4. Repeat play
5. Pause
...
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
The 4 wheel drive control ECU records DTCs when the ECU detects a malfunction
in the ECU itself or in system circuits.
The DTCs can be read through the DLC3 of the vehicle. When the system seems to
be malfunctioning, use the Techstream to check for malfunctions ...
