Toyota Tacoma 2015-2018 Service Manual: Terminals Of Ecu
TERMINALS OF ECU
1. REAR TELEVISION CAMERA ASSEMBLY
(a) Disconnect the T22 television camera assembly connector.
(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 |
|---|---|---|---|---|
|
T22-5 (CGND) - Body ground |
L - Body ground |
Ground |
Always |
Below 1 Ω |
|
T22-6 (CB+) - Body ground |
B - Body ground |
Power source |
Ignition switch ON, shift lever in R |
5.5 to 7.05 V |
If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the rear television camera assembly connector.
(d) Measure the waveform according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
T22-3 (CV+) - T22-2 (CV-) |
R - W |
Video signal |
Ignition switch ON, shift lever in R |
Pulse generation (See waveform 1) |
|
Ignition switch ON, shift lever in R, screen blacked out by covering camera lens |
Pulse generation (See waveform 2) |
HINT:
A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the radio and display receiver assembly*1 or navigation receiver assembly*2 with the connector connected.
If the result is not as specified, the rear television camera assembly may have a malfunction.
- *1: w/o Navigation System
- *2: w/ Navigation System
(e) Using an oscilloscope, check the waveform.
.png)
HINT:
A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the inner rear view assembly with the connector connected.
(1) Waveform 1 (Reference)
|
Item |
Content |
|---|---|
|
Terminal No. (Symbol) |
T22-3 (CV+) - T22-2 (CV-) |
|
Tool Setting |
200 mV/DIV., 50 μsec./DIV. |
|
Condition |
Ignition switch ON, shift lever in R |
HINT:
The video waveform changes according to the image sent by the rear television camera assembly.
(2) Waveform 2 (Reference)
|
Item |
Content |
|---|---|
|
Terminal No. (Symbol) |
T22-3 (CV+) - T22-2 (CV-) |
|
Tool Setting |
200 mV/DIV., 50 μsec./DIV. |
|
Condition |
Ignition switch ON, shift lever in R, screen blacked out by covering camera lens |
HINT:
The video waveform changes according to the image sent by the rear television camera assembly.
Text in Illustration|
*a |
Waveform 1 |
|
*b |
Waveform 2 |
|
*c |
Synchronized Signal |
|
*d |
Video Waveform |
2. RADIO AND DISPLAY RECEIVER ASSEMBLY (w/o Navigation System)
(See page .gif)
)
3. NAVIGATION RECEIVER ASSEMBLY (w/ Navigation System)
(See page )
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 ...
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Rear View Monitor System
DTC Code
Detection Item
See page
C1622
Open or Short Circuit in Back Camera Signal ...
Other materials:
Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter
DESCRIPTION
for Audio Function:
The radio and display receiver assembly receives a vehicle speed signal
from the combination meter assembly and sends the signal to radio and display
receiver assembly.
for Automatic Sound Levelizer (ASL):
This circuit is necessary fo ...
Daytime Running Light Relay
Inspection
INSPECTION
PROCEDURE
1. INSPECT NO. 1 DAY TIME RUNNING LIGHT RELAY
(a) Check the resistance.
(1) Measure the resistance according to the value(s) in the table below.
Standard:
Tester Connection
Condition
Specified ...
System Diagram
SYSTEM DIAGRAM
1. OVERALL CAN BUS DIAGRAM
(a) The CAN communication system is composed of 4 buses.
CAN Main Bus Line
Terminating Resistor
CAN Branch Line
*
Gateway Function Equipped ECU
...
