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:
All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch
DESCRIPTION
The main body ECU (multiplex network body ECU) receives switch signals from the
door control switch assembly on the front passenger door and activates the door
lock motor on each door according to these signals.
WIRING DIAGRAM
PROCEDURE
1.
READ VALUE USIN ...
Precaution
PRECAUTION
1. EXPRESSIONS OF IGNITION SWITCH
HINT:
The type of ignition switch used on this model differs according to the specifications
of the vehicle. The expressions listed in the table below are used in this section.
Expression
Ignition Switch
(Position)
...
Installation
INSTALLATION
PROCEDURE
1. INSTALL INTAKE MANIFOLD
(a) Set 2 new No. 1 intake manifold to head gaskets on cylinder head
sub-assembly and cylinder head LH as shown in the illustration.
NOTICE:
Align the port holes of the gasket and cylinder head sub-assembly
...
