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:

Check Mode Procedure
CHECK MODE PROCEDURE 1. DESCRIPTION (a) Check mode has a higher sensitivity to malfunctions and can detect malfunctions that normal mode cannot detect. Check mode can also detect all the malfunctions that normal mode can detect. In check mode, DTCs are detected with 1 trip detection logic. ...

Rear Body Side Panel Protector
Components COMPONENTS ILLUSTRATION ILLUSTRATION Installation INSTALLATION CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH side and LH side. The following procedure is for the LH side. PROCEDURE 1. INSTALL REAR BODY SIDE PANEL PROTECTOR (a) for Sho ...

Precaution
PRECAUTION 1. EXPRESSIONS OF IGNITION SWITCH (a) The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this section. Expression Ignition Switch (Position) Engi ...

В© 2011-2020 Copyright www.ttguide.net