Toyota Tacoma 2015-2018 Service Manual: AUTO LSD Indicator Light does not Come ON
DESCRIPTION
The AUTO LSD does not operate even if the VSC OFF switch is pressed under the following conditions:
- The brake system is faulty.
- The temperature inside the hydraulic brake booster increases and the AUTO LSD operation is suspended.
- The rear differential is locked.
WIRING DIAGRAM
Refer to AUTO LSD 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 DTC |
(a) Check for DTCs (See page
).
|
Result |
Proceed to |
|---|---|
|
DTC is not output |
A |
|
DTC is output |
B |
| B | |
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS |
|
|
3. |
CHECK HARNESS AND CONNECTOR (CSW TERMINAL) |
| NG | |
GO TO STEP 6 |
|
|
4. |
CHECK FOR DIFFERENTIAL SYSTEM |
(a) Reconnect the S1 skid control ECU (master cylinder solenoid) connector.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Four Wheel Drive / Trouble Codes.
(f) Check for DTCs.
Result|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| B | |
GO TO DIFFERENTIAL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) |
|
|
5. |
PERFORM ACTIVE TEST USING TECHSTREAM (AUTO LSD INDICATOR 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 |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Auto LSD Indicator Light |
Auto LSD indicator light |
Indicator light OFF/ON |
Observe the 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 |
|---|---|---|---|
|
Auto LSD Indicator Light |
Auto LSD indicator light/ ON or OFF |
ON: Indicator light on OFF: Indicator light off |
- |
|
Result |
Proceed to |
|---|---|
|
Auto LSD Indicator Light in the Data List does not change using the Active Test |
A |
|
Auto LSD Indicator Light in the Data List turns ON/OFF using the Active Test |
B |
| OK | |
GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
| NG | |
REPLACE MASTER CYLINDER SOLENOID |
|
6. |
INSPECT VSC OFF SWITCH |
| NG | |
REPLACE VSC OFF SWITCH |
|
|
7. |
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 |
VSC OFF Indicator Light does not Come ON
DESCRIPTION
Refer to VSC OFF Indicator Light Remains ON (See page
).
WIRING DIAGRAM
Refer to VSC OFF Indicator Light Remains ON (See page
).
CAUTION / NOTICE / HINT
NOTICE:
When repl ...
AUTO LSD Indicator Light Remains ON
DESCRIPTION
During normal mode, pressing the VSC OFF switch for a short amount of time changes
vehicle to AUTO LSD mode.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
When replacing ...
Other materials:
Input Speed Sensor Circuit No Signal (P0717,P07BF,P07C0)
DESCRIPTION
This sensor detects the rotation speed of the turbine which shows the input turbine
speed of the transmission. By comparing the input turbine speed signal (NT) with
the output shaft speed sensor signal (SP2), the ECM detects the shift timing of
the gears and appropriately controls ...
Tires
Replace or rotate tires in accordance with maintenance schedules and treadwear.
■ Checking tire
1. New tread
2. Treadwear indicator
3. Worn tread
The location of treadwear indicators is shown by the “TWI” or “
” marks, etc., molded on the sidewall of each tire.
Check spare ti ...
Parts Location
PARTS LOCATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
...