Toyota Tacoma manuals

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 3. FUNCTION OF INDICATOR LIGHT ).

3. FUNCTION OF INDICATOR LIGHT

(a) When a problem occurs in the touch select 2-4 and high-low system, a message is displayed on the multi-information display and/or the 4LO 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 status (illumination and blinking) or multi-information display status when DTC is output.

TOUCH SELECT 2-4 AND HIGH-LOW SYSTEM

DTC No.

4WD Indicator Light (Green)

4LO Indicator Light

Multi-information Display Message

U0100

When 2WD: Not illuminated

When H4 or L4: Illuminated

Rapidly blinking

-

U0122

Not illuminated

Rapidly blinking*1

2WD-4WD mode change malfunction visit your dealer

U0416

P163B

P17A0

P17A4

Not illuminated

Not illuminated

2WD-4WD mode change malfunction visit your dealer

P17A8

Not illuminated

Rapidly blinking

2WD-4WD mode change malfunction visit your dealer

P17A9

P17AA

P17AC

P17C7

Not illuminated

When 2WD or H4: Not illuminated

When L4: Illuminated

2WD-4WD mode change malfunction visit your dealer

P17C8

P2772

When 2WD: Not illuminated

When H4 or L4: Illuminated

Rapidly blinking

-

P279E

Not illuminated

Rapidly blinking

2WD-4WD mode change malfunction visit your dealer

Rapidly blinking: Blinks at 0.25 second intervals (0.25 seconds on and 0.25 seconds off)

  • *1: P163B may also display the 2WD/4WD mode status.
System Diagram
SYSTEM DIAGRAM Transmitting ECU (Transmitter) Receiving ECU Signal Communication Method 4 wheel drive control ECU Skid ...

Dtc Check / Clear
DTC CHECK / CLEAR 1. CHECK DTC (a) Check the DTCs. (1) Turn the ignition switch off. (2) Connect the Techstream to the DLC3. (3) Turn the ignition switch to ON. (4) Turn the Techstream on. (5) ...

Other materials:

Customize Parameters
CUSTOMIZE PARAMETERS PROCEDURE 1. CUSTOMIZE SLIDING ROOF SYSTEM HINT: The following items can be customized. NOTICE: When the customer requests a change in a function, first make sure that the function(s) can be customized. Be sure to make notes of the current settings before c ...

Pressure Control Solenoid "D" Performance (Shift Solenoid Valve SLT) (P2714)
SYSTEM DESCRIPTION The shift solenoid valve SLT controls the transmission line pressure for smooth transmission operation based on signals from the throttle position sensor and the vehicle speed sensor. The ECM adjusts the current to shift solenoid valve SLT to control hydraulic line pressure ...

Unlock Warning Switch
Components COMPONENTS ILLUSTRATION Inspection INSPECTION PROCEDURE 1. INSPECT UNLOCK WARNING SWITCH ASSEMBLY (a) Check the resistance. (1) Measure the resistance according to the value(s) in the table below. Text in Illustration *a Com ...

В© 2011-2020 Copyright www.ttguide.net