Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Diagnosis System

DIAGNOSIS SYSTEM

1. DESCRIPTION

(a) The steering lock ECU (steering lock actuator or UPR bracket assembly) stores DTCs when a malfunction occurs in the system. These DTCs can be confirmed by using the Techstream.

NOTICE:

  • When using the Techstream with the engine switch off to confirm DTCs or Data List information related to the smart key system, the Techstream may not operate unless either of the following is performed: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle and select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key.
  • Do not remove any fuses or disconnect the cable from the negative (-) battery terminal before confirming and recording DTCs as the data stored in the ECUs will be cleared.
  • DTCs may have been stored due to problems unrelated to the steering lock system. Be sure to confirm and record any DTCs output for other systems.

(b) The steering lock ECU (steering lock actuator or UPR bracket assembly) is not connected to the CAN communication system. Therefore, communication with the Techstream is performed via the certification ECU (smart key ECU assembly).

(c) The steering lock ECU (steering lock actuator or UPR bracket assembly) only stores DTCs for currently existing malfunctions. History DTCs are not stored.

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: 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 lis ...

Dtc Check / Clear
DTC CHECK / CLEAR NOTICE: The steering lock ECU (steering lock actuator or UPR bracket assembly) does not store history DTCs. If any DTCs are output, confirm and record them as soon ...

Other materials:

Rear differential lock system
The rear differential lock system is provided for use only when wheel spinning occurs in a ditch or on a slippery or rugged surface. The rear differential lock system is effective in case one of the rear wheels is spinning. Press the RR DIFF LOCK switch to lock the rear differential. At thi ...

Panel Switches do not Function
PROCEDURE 1. CHECK PANEL SWITCH (a) Check for foreign matter around the switches that might prevent operation. OK: No foreign matter is found. NG REMOVE ANY FOREIGN MATTER FOUND OK ...

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: 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 probability in the "Suspected Area" column of the table. Check each symptom by check ...

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