Toyota Tacoma (2015-2018) Service Manual: Terminals Of Ecu
TERMINALS OF ECU
1. COMBINATION METER ASSEMBLY
(a) Measure the voltage, resistance and check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
C9-1 (CANH) - Body ground |
G - Body ground |
CAN communication line |
- |
- |
|
C9-2 (CANL) - Body ground |
W - Body ground |
CAN communication line |
- |
- |
|
C9-4 (MSCH) - Body ground |
B - Body ground |
Local bus communication line |
- |
- |
|
C9- 5 (MSCL) - Body ground |
W - Body ground |
Local bus communication line |
- |
- |
|
C9-7 (EL) - Body ground |
V - Body ground |
LH turn indicator light signal (Input) |
Ignition switch ON, LH turn signal switch off |
11 to 14 V |
|
Ignition switch ON, LH turn signal switch on |
Below 1 V |
|||
|
C9-8 (ER) - Body ground |
GR - Body ground |
RH turn indicator light signal (Input) |
Ignition switch ON, RH turn signal switch off |
11 to 14 V |
|
Ignition switch ON, RH turn signal switch on |
Below 1 V |
|||
|
C9-9 (SW) - Body ground |
R - Body ground |
Turn switch signal |
Ignition switch ON, LH and RH turn signal switch off |
11 to 14 V |
|
Ignition switch ON, LH or RH turn signal switch on |
Below 1 V |
|||
|
C9-11 (BKSW) - Body ground |
L - Body ground |
Stop light switch signal |
Stop light switch on |
11 to 14 V |
|
Stop light switch off |
Below 1 V |
|||
|
C9-13 (HAZ) - Body ground |
Y - Body ground |
Hazard warning signal switch signal |
Ignition switch ON, hazard warning signal switch not pressed |
11 to 14 V |
|
Ignition switch ON, hazard warning signal switch pressed |
Below 1 V |
|||
|
C9-15 (ILL-) - Body ground |
BE - Body ground |
Illumination signal |
Headlight dimmer switch off |
Below 1 V |
|
Headlight dimmer switch in tail or head position |
Pulse generation |
|||
|
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 |
|
C9-19 (B) - Body ground |
P - Body ground |
Battery |
Always |
11 to 14 V |
|
C9-20 (IG+) - Body ground |
BE - Body ground |
Ignition switch signal |
Ignition switch off |
Below 1 V |
|
Ignition switch ON |
11 to 14 V |
|||
|
C9-21 (L) - C9-23 (E3) |
BE - G |
Fuel level signal |
Ignition switch ON, fuel level full |
Below 1 V |
|
Ignition switch ON, fuel level low (fuel level warning light on) |
4.5 to 9 V |
|||
|
C9-25 (S) - Body ground |
LG - Body ground |
Oil pressure signal |
Ignition switch ON, oil pressure warning OFF |
11 to 14 V |
|
Ignition switch ON, oil pressure warning ON |
Below 1 V |
|||
|
C9-26 (WLVL) - Body ground*1 |
B - Body ground |
Washer fluid level signal |
Ignition switch ON, washer fluid level not low |
11 to 14 V |
|
Ignition switch ON, washer fluid level low |
Below 1 V |
|||
|
C9-28 (SW) - Body ground*2 |
LG - Body ground |
Brake fluid level signal |
Ignition switch ON, brake fluid level not low |
11 to 14 V |
|
Ignition switch ON, brake fluid level low |
Below 1 V |
|||
|
C9-30 (MSM+) - Body ground |
P - Body ground |
Steering pad switch assembly signal |
Ignition switch ON, enter, top and back switches on steering pad switch assembly not pushed |
4.8 to 5.2 V |
|
Ignition switch ON, enter, top or back switches on steering pad switch assembly pushed |
Below 1 V |
|||
|
C9-32 (MSSL) - Body ground |
SB - Body ground |
Steering pad switch assembly signal |
Ignition switch ON, enter, top and back switches on steering pad switch assembly not pushed |
4.8 to 5.2 V |
|
Ignition switch ON, enter, top or back switches on steering pad switch assembly pushed |
Below 1 V |
|||
|
C9-34 (MSTI) - Body ground |
L - Body ground |
Steering pad switch assembly signal |
Ignition switch ON, up, down, right, and left switches on steering pad switch assembly not pushed |
4.8 to 5.2 V |
|
Ignition switch ON, up, down, right, or left switches on steering pad switch assembly pushed |
Below 1 V |
|||
|
C9-36 (OIL) - Body ground*3 |
W - Body ground |
Oil level switch signal |
Ignition switch ON, oil level low |
11 to 14 V |
|
Ignition switch ON, oil level not low |
Below 1 V |
|||
|
C9-37 (VCM) - Body ground*2*3 |
LG - Body ground |
Vacuum switch signal |
Ignition switch ON, vacuum pressure not low |
11 to 14 V |
|
Ignition switch ON, vacuum pressure low |
Below 1 V |
|||
|
C9-39 (SI) - Body ground |
G - Body ground |
Speed signal for other system (Input) |
Ignition switch ON, wheel being rotated |
Pulse generation (See waveform 1) |
|
C9-40 (+S) - Body ground |
V - Body ground |
Speed signal for other system (Output) |
Ignition switch ON, wheel being rotated |
Pulse generation (See waveform 1) |
|
C10-1 (B) - Body ground |
V - Body ground |
Battery |
Always |
11 to 14 V |
|
C10-3 (RRT) - Body ground |
L - Body ground |
RH turn indicator light signal (Input) |
Ignition switch ON, RH turn signal switch off |
Below 1 V |
|
Ignition switch ON, RH turn signal switch on |
11 to 14 V ←→ Below 1 V |
|||
|
C10-5 (RLT) - Body ground |
Y - Body ground |
LH turn indicator light signal (Output) |
Ignition switch ON, LH turn indicator light off |
Below 1 V |
|
Ignition switch ON, LH turn indicator light blinking |
11 to 14 V ←→ Below 1 V |
|||
|
C10-9 (LL) - Body ground |
BE - Body ground |
LH turn indicator light signal (Output) |
Ignition switch ON, LH turn indicator light off |
Below 1 V |
|
Ignition switch ON, LH turn indicator light blinking |
11 to 14 V ←→ Below 1 V |
|||
|
C10-11 (TLT) - Body ground*4 |
V - Body ground |
LH turn indicator light signal (Output) |
Ignition switch ON, LH turn indicator light off |
Below 1 V |
|
Ignition switch ON, LH turn indicator light blinking |
11 to 14 V ←→ Below 1 V |
|||
|
C10-12 (TRT) - Body ground*4 |
SB - Body ground |
RH turn indicator light signal (Output) |
Ignition switch ON, RH turn signal switch off |
Below 1 V |
|
Ignition switch ON, RH turn signal switch on |
11 to 14 V ←→ Below 1 V |
|||
|
C10-13 (B) - Body ground |
W - Body ground |
Battery |
Always |
11 to 14 V |
|
C10-10 (LR) - Body ground |
SB - Body ground |
RH turn indicator light signal (Output) |
Ignition switch ON, RH turn indicator light off |
Below 1 V |
|
Ignition switch ON, RH turn indicator light blinking |
11 to 14 V ←→ Below 1 V |
- *1: Washer Fluid Level Warning
- *2: for Vacuum Booster Type
- *3: for 2GR-FKS
- *4: w/ Trailer Towing System
(1) Waveform 1 (Reference):
|
Item |
Condition |
|---|---|
|
Tool Setting |
5 V/DIV., 20 ms./DIV. |
|
Vehicle Condition |
Ignition switch ON, wheel being rotated |
HINT:
When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.
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 symptom
are list ...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuators and other items to be read without removing any p ...
Other materials:
Clutch start cancel switch
The switch allows the vehicle to be driven out of difficult situations by cranking
the engine with the clutch engaged.
Never use the switch for normal engine starting. Be sure to follow the starting
procedure.
Press the CLUTCH START CANCEL switch to cancel the clutch start system when the
...
Parking brake
Lever type
● Sets the parking brake
Fully set the parking brake while depressing the brake pedal.
At this time, the indicator will come on.
● Release the parking brake
Press the button
Turn the lever clockwise
Press it in completely
Pedal type
Sets the parking brake*.
...
Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter
DESCRIPTION
for Navigation Function:
The navigation receiver assembly receives a vehicle speed signal from
the combination meter assembly and sends the signal to navigation receiver
assembly.
for Automatic Sound Levelizer (ASL):
This circuit is necessary for the Aut ...
