Toyota Tacoma manuals

Toyota Tacoma (2015-2018) Service Manual: Diagnosis System

DIAGNOSIS SYSTEM

1. DESCRIPTION

(a) To check DTCs, connect the Techstream to the Data Link Connector 3 (DLC3) of the vehicle. The Techstream displays DTCs and freeze frame data. The DTCs and freeze frame data can be cleared with the Techstream (See page 2. NORMAL MODE AND CHECK MODE ).

2. NORMAL MODE AND CHECK MODE

(a) The diagnosis system operates in "normal mode" during normal vehicle use. In normal mode, "2 trip detection logic" is used to ensure accurate detection of malfunctions. "Check mode" is also available to technicians as an option. In check mode, "1 trip detection logic" is used for simulating malfunction symptoms and increasing the system's ability to detect malfunctions, including intermittent malfunctions.

3. 2 TRIP DETECTION LOGIC

(a) When a malfunction is first detected, the malfunction is stored as a pending DTC in the ECM memory (1st trip). If the same malfunction is detected during the next drive cycle, the DTC is stored (2nd trip).

4. FREEZE FRAME DATA

(a) The Techstream records freeze frame data in 5 different instances: 1) 3 times before the DTC is stored, 2) once when the DTC is stored, and 3) once after the DTC is stored. These sets of data can be used to simulate the vehicle condition around the time when the malfunction occurred. The data may help in finding the cause of the malfunction, or in judging if the DTC was caused by a temporary malfunction.

5. CHECK DATA LINK CONNECTOR 3 (DLC3)

5. CHECK DATA LINK CONNECTOR 3 (DLC3)

(a) Check the DLC3 (See page Terminals Of Ecm ).

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of pro ...

Terminals Of Ecm
TERMINALS OF ECM HINT: The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indic ...

Other materials:

Parts Location
PARTS LOCATION ILLUSTRATION *A for Double Cab *B for Access Cab *C w/ Back Door Power Window - - *1 NO. 1 BACK PANEL RELAY *2 NO. 2 BACK PANEL RELAY ...

System Diagram
SYSTEM DIAGRAM Communication Table Sender Receiver Signal Line *1: for Vacuum Brake Booster *2: for Hydraulic Brake Booster Millimeter Wave Radar Sensor Assembly Forward Recognition Camera ...

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 ...

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