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:

Sending Malfunction (Navigation to APGS) (U0073,U0100,U0129,U0140,U0155,U0164)
DESCRIPTION These DTCs are stored when a malfunction occurs in the CAN communication circuit. DTC Code DTC Detection Condition Trouble Area U0073 CAN bus connection error CAN communication system U0100 ...

Removal
REMOVAL PROCEDURE 1. REMOVE FRONT FENDER SEAL RH HINT: Use the same procedure as for the LH side (See page ). 2. REMOVE V-BANK COVER SUB-ASSEMBLY 3. REMOVE AIR CLEANER CAP AND HOSE 4. REMOVE ENGINE OIL LEVEL DIPSTICK GUIDE (a) Remove the engine oil level dipstick. (b) Di ...

Removal
REMOVAL PROCEDURE 1. REMOVE FRONT SEAT ASSEMBLY (for Driver Side) (See page ) 2. REMOVE FRONT SEAT ASSEMBLY (for Front Passenger Side) (See page ) 3. REMOVE SEPARATE TYPE FRONT SEATBACK COVER (for Driver Side) (See page ) 4. REMOVE SEPARATE TYPE FRONT SEATBACK COVER (for Front Pa ...

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