Toyota Tacoma (2015-2018) Service Manual: Terminals Of Ecu
TERMINALS OF ECU
1. CLEARANCE WARNING ECU ASSEMBLY
(a) Disconnect the C30 connector from the clearance warning ECU assembly.
(b) Measure the voltage and resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
C30-9 (CLSW) - C30-30 (E) |
Y - W-B |
Back sonar or clearance sonar switch assembly power source signal |
Ignition switch ON, back sonar or clearance sonar switch assembly on |
11 to 14 V |
|
C30-9 (CLSW) - C30-30 (E) |
Y - W-B |
Back sonar or clearance sonar switch assembly power source signal |
Ignition switch ON, back sonar or clearance sonar switch assembly off |
Below 1 V |
|
C30-1 (IG) - C30-30 (E) |
P - W-B |
IG power source signal |
Ignition switch off |
Below 1 V |
|
Ignition switch ON |
11 to 14 V |
|||
|
C30-30 (E) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
(c) Reconnect the C30 connector to the clearance warning ECU assembly.
(d) 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 |
|---|---|---|---|---|
|
C30-22 (BOR) - C30-30 (E) |
BE - W-B |
Power source for rear sensor circuit |
Ignition switch off |
Below 1 V |
|
Ignition switch ON, back sonar or clearance sonar switch assembly on |
7.2 to 8.8 V |
|||
|
C30-13 (ER) - C30-30 (E) |
R - W-B |
Clearance warning buzzer signal |
Buzzer sounding |
Pulse generation (See waveform 1) |
|
C30-23 (E1) - C30-30 (E) |
B - W-B |
Ground for rear clearance sonar |
Always |
Below 1 V |
|
C30-24 (SOR) - C30-30 (E) |
V - W-B |
Rear sensor communication signal (Rear clearance sonar sensor) |
Ignition switch ON, back sonar or clearance sonar switch assembly on, shift lever in R |
Pulse generation (See waveform 2) |
(e) Using an oscilloscope, check waveform 1.
(1) Waveform 1 (Reference)
|
Item |
Content |
|---|---|
|
Terminal No. (Symbol) |
C30-13 (ER) - C30-30 (E) |
|
Tool Setting |
2 V/DIV., 500 μsec./DIV. |
|
Vehicle Condition |
When sonar detects obstacle (buzzer sounds) |
|
Buzzer volume |
M2 (Medium volume) |
HINT:
The amplitude of the waveform changes according to the set volume.
(f) Using an oscilloscope, check waveform 2.
(1) Waveform 2 (Reference)
|
Item |
Content |
|---|---|
|
Terminal No. (Symbol) |
C30-24 (SOR) - C30-30 (E) |
|
Tool Setting |
5 V/DIV., 1 msec./DIV. |
|
Condition |
Ignition switch ON, back sonar or clearance sonar switch assembly on, shift lever in R |
HINT:
The waveforms for CH1 and CH2 are same.
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 lis ...
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) When troubleshooting a vehicle with a diagnosis system, the only difference
from the usual troubleshooting procedure is connecting the Techstream to the vehicle ...
Other materials:
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT DRIVER SEAT BELT WARNING LIGHT
HINT:
The seat belt warning light on the combination meter assembly is used for both
the driver seat and front passenger seat.
(a) Turn the ignition switch to ON.
(b) When the driver seat belt is not fastened, check th ...
Removal
REMOVAL
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for both the RH and LH sides.
The procedure described below is for the LH side.
PROCEDURE
1. PRECAUTION
NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting
the cable f ...
Removal
REMOVAL
PROCEDURE
1. REMOVE FRONT SEAT ASSEMBLY (for Driver Side)
(See page
)
2. REMOVE FRONT SEAT ASSEMBLY (for Front Passenger Side)
(See page
)
3. REMOVE SEPARATE TYPE FRONT SEATBACK COVER (for Driver Side)
(See page
)
4. REMOVE SEPARATE TYPE FRONT SEATBACK COVER (for Front Pa ...
