Toyota Tacoma (2015-2018) Service Manual: Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
The 4 wheel drive control ECU records DTCs when the ECU detects a malfunction in the ECU itself or in system circuits.
The DTCs can be read through the DLC3 of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform troubleshooting.
2. CHECK DLC3
(a) Inspect the battery voltage.
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge the battery before proceeding.
(b) Check the DLC3 (See page .gif)
).
3. FUNCTION OF INDICATOR LIGHT
(a) When a problem occurs in the differential system (w/ Differential Lock), the rear differential lock indicator light on the combination meter assembly rapidly blinks* to inform the driver of the problem.
- *: 0.25 second intervals (0.25 seconds on and 0.25 seconds off)
(b) Indicator light (illuminated or blinking) or multi-information display status when DTC is output.
(1) for 4WD
DIFFERENTIAL SYSTEM (w/ Differential Lock)|
DTC No. |
Rear Differential Lock Indicator Light |
4WD Indicator Light (Green) |
4LO Indicator Light |
Multi-information Display Message |
|---|---|---|---|---|
|
U0122 |
Rear differential locked: Illuminated Rear differential free: Not illuminated |
Not illuminated |
Rapidly blinking |
2WD-4WD mode change malfunction visit your dealer |
|
U0416 |
||||
|
P163B |
Not illuminated |
Status displayed* |
||
|
P17BB |
Rapidly blinking |
Not illuminated |
Not illuminated |
- |
|
P17BC |
||||
|
P17C0 |
Rapidly blinking |
Status displayed* |
Status displayed* |
- |
|
P17C1 |
||||
|
P17CC |
Rapidly blinking |
Not illuminated |
Not illuminated |
- |
- *: Displays the 2WD/4WD mode status during a malfunction
- Rapidly blinking: Blinks at 0.25 second intervals (0.25 seconds on and 0.25 seconds off)
(2) for 2WD:
DIFFERENTIAL SYSTEM (w/ Differential Lock)|
DTC No. |
Rear Differential Lock Indicator Light |
|---|---|
|
U0122 |
Rapidly blinking |
|
U0416 |
|
|
P163B |
|
|
P17BB |
|
|
P17BC |
|
|
P17C0 |
|
|
P17C1 |
|
|
P17CC |
- Rapidly blinking: Blinks at 0.25 second intervals (0.25 seconds on and 0.25 seconds off)
4. CHECK INDICATOR LIGHT
(a) for 4WD:
With the ignition switch turned to ON and the transfer in 2WD, press the differential lock switch and check that the rear differential lock indicator light blinks* 3 times.
*: 0.5 second intervals (0.5 seconds on and 0.5 seconds off)
for 2WD:
With the ignition switch turned to ON, press the differential lock switch and check that the rear differential lock indicator light blinks* 3 times.
*: 0.5 second intervals (0.5 seconds on and 0.5 seconds off)
System Description
SYSTEM DESCRIPTION
1. DESCRIPTION
The differential system (w/ Differential Lock) directly connects the
rear left and right wheels so that even if one wheel slips while driving
where d ...
Terminals Of Ecu
TERMINALS OF ECU
1. CHECK 4 WHEEL DRIVE CONTROL ECU
Text in Illustration
*a
Component with harness connected
(4 Wheel Drive Control ECU)
-
-
...
Other materials:
Portable Player cannot be Connected Manually/Automatically
CAUTION / NOTICE / HINT
HINT:
Some versions of "Bluetooth" compatible audio players may not function, or the
function may be limited using the navigation receiver assembly, even if the portable
audio player itself can play files (See page ).
PROCEDURE
1.
CHE ...
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 ...
Slip Indicator Light Remains ON
DESCRIPTION
The slip indicator light blinks during VSC or TRAC and AUTO LSD operation. When
the system fails, the slip indicator light comes on to warn the driver.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
When replacing the skid control ECU (master cylinder solenoid), perform ...
