Toyota Tacoma (2015-2018) Service Manual: Clearance Warning Buzzer Circuit
DESCRIPTION
This circuit consists of the No. 1 clearance warning buzzer and clearance warning ECU assembly. An ECU-excited type buzzer is used. The battery voltage supplied through the buzzer is grounded inside the clearance warning ECU assembly using a pulsed digital pattern, producing sound. The ECU operates the buzzer using a sound pattern that changes depending on the distance to the obstacle.
WIRING DIAGRAM
PROCEDURE
|
1. |
PERFORM ACTIVE TEST USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Intuitive P/A / Active Test.
(e) Check that the buzzer operates by performing the Active Test.
Intuitive P/A|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Buzzer |
No. 1 clearance warning buzzer |
Operate or Stop |
Confirm that the vehicle is stopped and the ignition switch is ON |
OK:
The No. 1 clearance warning buzzer sounds.
| OK | .gif) |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
.gif)
|
2. |
CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - NO. 1 CLEARANCE WARNING BUZZER) |
(a) Disconnect the N31 connector from the No. 1 clearance warning buzzer.
(b) Disconnect the C30 connector from the clearance warning ECU assembly.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C30-14 (BBZ) - N31-1 |
Always |
Below 1 Ω |
|
C30-13 (ER) - N31-2 |
||
|
C30-14 (BBZ) - Body ground |
10 kΩ or higher |
|
|
C30-13 (ER) - Body ground |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
REPLACE NO. 1 CLEARANCE WARNING BUZZER |
(a) Replace the No. 1 clearance warning buzzer with a new or known good one (See
page .gif)
).
|
|
4. |
PERFORM ACTIVE TEST USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Intuitive P/A / Active Test.
(e) Check that the buzzer operates by performing the Active Test.
Intuitive P/A|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Buzzer |
No. 1 clearance warning buzzer |
Operate or Stop |
Confirm that the vehicle is stopped and the ignition switch is ON |
OK:
The No. 1 clearance warning buzzer sounds.
| OK | |
END (NO. 1 CLEARANCE WARNING BUZZER WAS DEFECTIVE) |
| NG | |
REPLACE CLEARANCE WARNING ECU ASSEMBLY |
Clearance Sonar Main Switch Circuit
DESCRIPTION
The back sonar or clearance sonar switch assembly is installed at the base of
the driver side of the instrument panel.
When the back sonar or clearance sonar switch assembly is turned ...
Clearance Warning ECU Power Source Circuit
DESCRIPTION
This circuit provides power to operate the clearance warning ECU assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuse for circuits related to this system before ...
Other materials:
Installation
INSTALLATION
PROCEDURE
1. INSTALL FRONT SEATBACK HEATER ASSEMBLY
(a) Set the front seatback heater assembly with the name stamp side facing the
front seatback cover.
(b) Install the front seatback heater assembly with 14 new tag pins.
2. INSTALL SEPARATE TYPE FRONT SEATBACK COVER (for Front P ...
Driver Side Door Entry Lock and Unlock Functions do not Operate
DESCRIPTION
If the entry lock and unlock functions do not operate for the driver door only,
the request code may not be being transmitted from the driver door or the front
door outside handle assembly LH (touch sensor) may be malfunctioning. If the entry
functions for other doors operate prop ...
Key Cannot be Registered
DESCRIPTION
A maximum of 5 master key ID codes can be registered.
WIRING DIAGRAM
Refer to "B2780" (See page )
CAUTION / NOTICE / HINT
NOTICE:
If the transponder key ECU assembly is replaced, refer to Registration (See page
).
PROCEDURE
1.
CHECK REGISTRATIO ...
