Toyota Tacoma (2015-2018) Service Manual: A-TRAC Indicator Light does not Come ON
DESCRIPTION
The A-TRAC does not operate even if the A-TRAC switch is pressed under the following conditions:
- The TRAC or VSC system is faulty.
- The temperature inside the hydraulic brake booster increases and the A-TRAC operation is suspended.
WIRING DIAGRAM
Refer to A-TRAC Indicator Light Remains ON (See page
.gif)
).
CAUTION / NOTICE / HINT
NOTICE:
- When replacing the skid control ECU (master cylinder solenoid), perform
calibration (See page
).
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
|
1. |
CHECK CAN COMMUNICATION SYSTEM |
| NG | .gif) |
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
|
.gif)
|
2. |
CHECK HARNESS AND CONNECTOR (ATRC TERMINAL) |
| NG | |
GO TO STEP 4 |
|
|
3. |
READ VALUE USING TECHSTREAM (A-TRC(TRAC) SWITCH) |
| OK | |
GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
| NG | |
REPLACE MASTER CYLINDER SOLENOID |
|
4. |
INSPECT A-TRAC SWITCH |
| NG | |
REPLACE A-TRAC SWITCH |
|
|
5. |
INSPECT ROOF CONSOLE BOX ASSEMBLY |
| A | |
REPAIR OR REPLACE HARNESS OR CONNECTOR (MASTER CYLINDER SOLENOID - ROOF CONSOLE BOX ASSEMBLY) |
| B | |
REPLACE ROOF CONSOLE BOX ASSEMBLY |
| C | |
REPLACE ROOF CONSOLE BOX ASSEMBLY |
Slip Indicator Light does not Come ON
DESCRIPTION
Refer to Slip Indicator Light Remains ON (See page
).
WIRING DIAGRAM
Refer to Slip Indicator Light Remains ON (See page
).
CAUTION / NOTICE / HINT
NOTICE:
When replacing ...
A-TRAC Indicator Light Remains ON
DESCRIPTION
This is the A-TRAC main switch circuit. When the A-TRAC switch is turned on with
the transfer in L4, the A-TRAC function is available and the A-TRAC indicator light
illuminates.
WIRI ...
Other materials:
Seat heaters
On
The indicator comes on.
Adjusts the seat temperature.
The further you turn the dial upward, the warmer the seat becomes.
■The seat heaters can be used when
The engine switch is in the ON position.
■When not in use
Turn the dial fully downward. The indicator turns off.
CAUT ...
Front Passenger Side Power Window Auto Up / Down Function does not Operate with
Front Passenger Side Power Window Switch
DESCRIPTION
If the manual up/down function can be performed but the auto up/down function
cannot, the fail-safe mode may be functioning.
If the power window initialization (See page
) has not been performed, the auto up/down function will not operate.
WIRING DIAGRAM
CAUTION / NOTICE / HIN ...
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure listed to troubleshoot the differential
system (w/ Differential Lock).
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
...
