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:
System Description
SYSTEM DESCRIPTION
1. GENERAL
(a) To assist the driver with parking the vehicle by displaying an image of the
area behind the vehicle, this system has a rear television camera assembly mounted
on the tailgate. The system displays the image on the multi-display.
(b) This system consists of the ...
Air Conditioning Compressor Magnetic Clutch Circuit
DESCRIPTION
When the air conditioning amplifier assembly is turned on, a magnetic clutch
on signal is sent from the MGC terminal of the air conditioning amplifier assembly.
Then, the MG CLT relay turns on to operate the magnetic clutch assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NO ...
Reassembly
REASSEMBLY
PROCEDURE
1. INSTALL RADIATOR GRILLE MOULDING
(a) Engage the 8 claws to install the radiator grille moulding.
(b) Install the 8 screws.
2. INSTALL NO. 1 RADIATOR GRILLE GARNISH
(a) for Type A and Type B:
(1) Engag ...
