Toyota Tacoma 2015-2018 Service Manual: Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
The ECU stores trouble codes when malfunctions occur.
The diagnostic system allows for reading of the trouble codes from the DLC3.
Use the Techstream to help diagnose and repair the problem.
2. CHECK DLC3
(a) Check the DLC3 (See page .gif)
).
3. INSPECT BATTERY VOLTAGE
(a) Measure the battery voltage.
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery.
4. SELF-DIAGNOSTIC MODE
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Smart Key / Utility / Wireless Door Lock Diagnosis Mode.
(e) Proceed to the next step in accordance with the prompts on the Techstream screen.
HINT:
The electrical key transmitter uses 2 different frequencies alternately for communication. When in self diagnostic mode, one of the channels can be selected or the channels can be automatically switched.
(f) Check that the system has switched to self-diagnostic mode by checking the wireless door lock buzzer output pattern.
(g) Check the diagnostic outputs when the electrical key transmitter sub-assembly switch is held down.
The diagnostic outputs can be checked by the interior light and wireless door lock buzzer patterns.
Result
|
Wireless Door Lock Buzzer Output |
Suspected Area |
|---|---|
|
A |
Normal (No malfunction) |
|
B |
Register wireless code |
|
C |
Wave interference or malfunction of a related component |
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
1. CHECK FOR DTC
HINT:
When using the Techstream with the engine switch off to troubleshoot:
Connect the Techstream to the DLC3 and turn a courtesy light switch on and off
at 1 ...
Other materials:
Driver Side Door Entry Unlock Function does not Operate
DESCRIPTION
If the entry unlock function does not operate for the driver door only, but the
entry lock function operates, the request code is being transmitted properly from
the driver door. In this case, there may be a problem related to the touch sensor
(connection between the certification ...
Disassembly
DISASSEMBLY
PROCEDURE
1. REMOVE FRONT LOWER ARM BUSH NO. 1
(a) Using a hammer and chisel, raise the flange of the bush diagonally as shown
in the illustration.
(b) Using SST, remove the lower arm bush.
SST: 09950-40011
09951-04010
09952-04010
09953-04020
09954-04010 ...
Precaution
PRECAUTION
1. PRECAUTION FOR HEADLIGHT BULB REPLACEMENT
(a) When any defects such as deformation, cracks, dents, chipping, etc. are identified
on the headlight, replace it with a new one.
(b) Even if the operation seems to be normal, the fail-safe function may be defective.
(c) Since halogen b ...