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:
Installation
INSTALLATION
PROCEDURE
1. INSTALL FRONT AXLE HUB
2. INSTALL FRONT SUSPENSION UPPER ARM
(a) Install a new nut and clip.
Torque:
110 N·m {1122 kgf·cm, 81 ft·lbf}
3. INSTALL FRONT SUSPENSION LOWER ARM
(a) Install the front suspension lower arm with the 2 bolts.
Torque:
160 N·m {1631 ...
Diagnosis System
DIAGNOSIS SYSTEM
1. CHECK DLC3
(a) Check the DLC3 (See page ).
2. INSPECT BATTERY VOLTAGE
(a) Measure the battery voltage.
Standard Voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery.
3. SELF-DIAGNOSTIC MODE (OPERATING IGNITION KEY CYLINDER)
(a) Switch to se ...
Display does not Dim when Light Control Switch is Turned ON
PROCEDURE
1.
CHECK IMAGE QUALITY SETTING
(a) Display the "Display Settings" screen.
(b) Turn the light control switch to the tail or head position.
(c) Check if "Day Mode" on the display adjustment screen is on.
OK:
"Day Mode" sett ...
