Toyota Tacoma (2015-2018) Service Manual: Brake Warning Light does not Come ON
DESCRIPTION
The skid control ECU (brake actuator assembly) is connected to the combination meter assembly via CAN communication.
WIRING DIAGRAM
Refer to Brake Warning Light Remains ON (See page
.gif)
).
CAUTION / NOTICE / HINT
NOTICE:
When replacing the skid control ECU (brake actuator assembly), perform zero point
calibration and store system information (See page
).
PROCEDURE
|
1. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Check if CAN communication system DTCs are output (See page
).
|
Result |
Proceed to |
|---|---|
|
DTC is not output |
A |
|
DTC is output |
B |
| B | .gif) |
CHECK CAN COMMUNICATION SYSTEM |
|
.gif)
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM (BRAKE WARNING LIGHT) |
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / ABS/VSC/TRAC / Active Test.
(f) According to the display on the Techstream, perform the Active Test.
ABS/VSC/TRAC|
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Brake Warning Light |
Brake warning light |
Warning light OFF/ON |
Observe combination meter Vehicle condition: Vehicle stopped |
(g) When performing the Brake Warning Light Active Test, check Brake Warning Light in the Data List.
ABS/VSC/TRAC|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Brake Warning Light |
Brake warning light |
OFF or ON |
OFF: Warning light off ON: Warning light on |
- |
|
Result |
Proceed to |
|---|---|
|
Brake warning light in the Data List turns ON/OFF using the Active Test |
A |
|
Brake warning light in the Data List does not change using the Active Test |
B |
| B | |
REPLACE BRAKE ACTUATOR ASSEMBLY |
|
|
3. |
INSPECT COMBINATION METER ASSEMBLY |
(a) Turn the ignition switch off.
(b) Perform Active Test of the combination meter assembly using the Techstream.
(c) Check the combination meter assembly.
OK:
The brake warning light turns on or off in accordance with the Techstream.
| OK | |
REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG | |
INSPECT METER / GAUGE SYSTEM |
Brake Warning Light Remains ON
DESCRIPTION
The skid control ECU (brake actuator assembly) is connected to the combination
meter assembly via CAN communication.
If any of the following is detected, the brake warning light remain ...
Slip Indicator Light Remains ON
DESCRIPTION
The skid control ECU (brake actuator assembly) is connected to the combination
meter assembly via CAN communication.
The slip indicator light blinks during VSC and/or TRAC operation.
...
Other materials:
Voice Guidance does not Function
PROCEDURE
1.
CHECK VOICE GUIDANCE SETTING
(a) Check that the voice guidance setting is not off.
OK:
Voice guidance setting is not off.
NG
CHANGE THE VOICE GUIDANCE SETTING TO ON
OK
...
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT GARAGE DOOR OPENER
(a) Press each switch and check that the red LED turns on. If one or
more of the switches does not turn on the LED, confirm normal operation
of the fuse and wire harness. If the fuse and wire harness are malfunctioni ...
Precaution
PRECAUTION
1. INITIALIZATION
NOTICE:
If the ECM is replaced, register the ECU communication ID for Engine
Immobiliser System (See page ).
Perform Registration (VIN registration) when replacing the ECM (See
page ).
HINT:
The engine learned value cannot be rese ...
