Toyota Tacoma (2015-2018) Service Manual: ECU Power Source Circuit
DESCRIPTION
This circuit supplies power to the millimeter wave radar sensor assembly when the ignition switch is ON.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
|
1. |
CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY (B VOLTAGE) |
|
(a) Disconnect the millimeter wave radar sensor assembly connector. |
|
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
M8-8 (IGB) - Body ground |
Ignition switch ON |
11 to 14 V |
(d) Turn the ignition switch off.
(e) Connect the millimeter wave radar sensor assembly connector.
| NG | .gif) |
GO TO STEP 4 |
|
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|
2. |
CHECK HARNESS AND CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - BODY GROUND) |
|
(a) Disconnect the millimeter wave radar sensor assembly connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
M8-1 (SGND) - Body ground |
Always |
Below 1 Ω |
(c) Connect the millimeter wave radar sensor assembly connector.
| OK | |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
|
3. |
CHECK MILLIMETER WAVE RADAR WIRE |
(a) Disconnect the M8 millimeter wave radar sensor assembly connector.
(b) Disconnect the EP1 millimeter wave radar wire connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
M8-1 (SGND) - EP1-1 |
Always |
Below 1 Ω |
(d) Connect the M8 millimeter wave radar sensor assembly connector.
(e) Connect the EP1 millimeter wave radar wire connector.
| OK | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
| NG | |
REPAIR MILLIMETER WAVE RADAR WIRE |
|
4. |
CHECK MILLIMETER WAVE RADAR WIRE |
(a) Disconnect the M8 millimeter wave radar sensor assembly connector.
(b) Disconnect the EP1 millimeter wave radar wire connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
M8-8 (IGB) - EP1-8 |
Always |
Below 1 Ω |
|
EP1-8 - EP1-1 |
Always |
10 kΩ or higher |
(d) Connect the M8 millimeter wave radar assembly connector.
(e) Connect the EP1 millimeter wave radar sensor wire connector.
| OK | |
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
| NG | |
REPAIR MILLIMETER WAVE RADAR WIRE |
Front Radar Sensor (C1A10)
DESCRIPTION
When an internal malfunction is detected in the millimeter wave radar sensor
assembly, DTC C1A10 is stored.
DTC No.
Detection Item
DTC Detection Condit ...
Pre-collision System Warning Buzzer
Components
COMPONENTS
ILLUSTRATION
*1
SKID CONTROL BUZZER
-
-
Inspection
INSPECTION
PROCEDURE
1. INSPECT SKID CONTROL BUZZER
...
Other materials:
How To Proceed With Troubleshooting
PROCEDURE
1.
CHECK TIRE AND WHEEL SYSTEM
DIAGNOSIS OF IRREGULAR TIRE WEAR
GO TO STEP 11
DIAGNOSIS OF TIRE VIBRATION
2.
TIGHTEN WHEEL NUTS
...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
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 parts. This non-intrusive
inspection can be very useful because intermittent conditions or signals may be ...
Adjustment
ADJUSTMENT
CAUTION / NOTICE / HINT
CAUTION:
Radiofrequency radiation exposure information:
This equipment complies with FCC radiation exposure limits set forth
for an uncontrolled environment.
This equipment should be kept with minimum distance of 20 cm (7.87 in.)
between the ...
