Toyota Tacoma (2015-2018) Service Manual: ABS 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 ABS 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 (ABS WARNING LIGHT) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Chassis / ABS/VSC/TRAC / Active Test.
(e) According to the display on the Techstream, perform the Active Test.
ABS/VSC/TRAC|
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
ABS Warning Light |
ABS warning light |
Warning light OFF/ON |
Observe combination meter Vehicle condition: Vehicle stopped |
(f) When performing the ABS Warning Light Active Test, check ABS Warning Light in the Data List.
ABS/VSC/TRAC|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
ABS Warning Light |
ABS warning light |
ABS warning light |
OFF: Warning light off ON: Warning light on |
- |
|
Result |
Proceed to |
|---|---|
|
ABS warning light in the Data List does not change using the Active Test |
A |
|
ABS warning light in the Data List turns ON/OFF using the Active Test |
B |
| A | |
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 ABS warning light turns on or off in accordance with the Techstream.
| OK | |
REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG | |
INSPECT METER / GAUGE SYSTEM |
ECM Communication Circuit Malfunction (C1203)
DESCRIPTION
The circuit is used to send TRAC and VSC control information from the skid control
ECU (brake actuator assembly) to the ECM, and engine control information from the
ECM to the skid co ...
ABS 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 ABS warning light remains ...
Other materials:
Fuel Sender Gauge Assembly
Components
COMPONENTS
ILLUSTRATION
Inspection
INSPECTION
PROCEDURE
1. INSPECT FUEL SENDER GAUGE ASSEMBLY
(a) Check that the float moves smoothly between F and E.
Text in Illustration
*a
Component without harness connected
(Fuel Sen ...
Back-up Power Source Circuit
DESCRIPTION
The back-up power source circuit for the air conditioning amplifier assembly
is shown below. Power is supplied even when the ignition switch is off. The power
is used for diagnostic trouble code memory, etc.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for ...
Data List / Active Test
DATA LIST / ACTIVE TEST
DATA LIST
HINT:
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 ...
