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:
Pressure Control Solenoid "G" Actuator Stuck Off (P28077F)
SYSTEM DESCRIPTION
The ECM uses the vehicle speed signal and signals from the transmission revolution
sensors (NT, SP2) to detect the actual gear (1st, 2nd, 3rd, 4th, 5th or 6th gear).
The ECM compares the actual gear with the shift schedule in the ECM memory to
detect mechanical problems of t ...
Main Body ECU Communication Stop Mode
DESCRIPTION
Detection Item
Symptom
Trouble Area
Main Body ECU Communication Stop Mode
Either condition is met:
Communication stop for "Main Body" is indicated on the "Communication
Bus Check" screen ...
Removal
REMOVAL
PROCEDURE
1. REMOVE NO. 2 ENGINE UNDER COVER SUB-ASSEMBLY (w/ Off Road Package)
2. REMOVE NO. 1 ENGINE UNDER COVER SUB-ASSEMBLY
3. DRAIN ENGINE COOLANT
4. REMOVE V-BANK COVER SUB-ASSEMBLY
5. REMOVE RADIATOR SUPPORT TO FRAME SEAL
(a) Remove the 7 clips and radiator su ...
