Toyota Tacoma (2015-2018) Service Manual: Dtc Check / Clear

DTC CHECK / CLEAR

1. CHECK DTC (CHECK USING TECHSTREAM)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Navigation System / Trouble Codes.

(e) Check for DTCs, and then write them down.

(f) Check the details of the DTC(s) (See page ).

NOTICE:

The audio and visual system outputs DTCs for the following system. When DTCs other than those in Diagnostic Trouble Code Chart for the audio and visual system are output, refer to Diagnostic Trouble Code Chart for the relevant system.

System	Proceed to
Rear View Monitor System

2. CLEAR DTC (CLEAR USING TECHSTREAM)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Navigation System / Trouble Codes.

(e) Clear the DTCs.

3. START DIAGNOSTIC MODE

(a) There are 2 methods to start diagnostic mode. Start diagnostic mode by using either of them.

(b) Method 1

(1) Turn the ignition switch to ON.

(2) While pressing and holding the "AUDIO" switch, operate the light control switch: Off → Tail → Off → Tail → Off → Tail → Off.

(c) Method 2

(1) Turn the ignition switch to ON.

(2) Press the seek/track up panel switch 5 times and then press the seek/track down panel switch 5 times with the screen and audio turned off.

(d) Diagnostic mode starts and the "Service Menu" screen will be displayed. Service inspection starts automatically and the result will be displayed.

4. FAILURE DIAGNOSIS

(a) The "Failure Diagnosis" screen will be displayed by pressing the "Failure Diagnosis" switch on the "Service Menu" screen.

5. SYSTEM CHECK

(a) The "System Check Mode" screen will be displayed by pressing the "System Check" switch on the "Failure Diagnosis" screen.

6. CHECK DTC (CHECK USING SYSTEM CHECK MODE SCREEN)

(a) System check mode screen description

Screen Description

Display	Content
*a: Device Name List No. 1	Device Name List No. 1 displays some of the devices that make up the audio and visual system. The names of the components from Device Name List No. 1 are shown in the following table.
*b: Check Result	Result codes for all devices are displayed.
*c: Memory Clear	Present and history DTCs and registered connected device names are cleared. Press the "Memory CLR" switch for 3 seconds.
*d: Recheck	A system check will be performed again after the memory is cleared. The "Recheck" switch will dim during a system check.
*e: Device Name List No. 2	Device Name List No. 2 displays some of the devices that make up the audio and visual system. The names of the components from Device Name List No. 2 are shown in the following table.

*a: Device Name List No. 1 Description

Name	Component	Connection Method
DA	Radio and display receiver assembly	-
EXT BOX*1	Stereo component tuner assembly	Communication line for LVDS

*b: Check Result Description

Result	Meaning	Action
OK	The device does not respond with a DTC.	-
DETAIL	The device responds with a DTC.	Look up the DTC in "Unit Check Mode".
NCON	The device was previously present, but does not respond in diagnostic mode.	- Check power supply wire harness of the device. - Check the AVC-LAN of the device.
NRES	The device responds in diagnostic mode, but gives no DTC information.	- Check power supply wire harness of the device. - Check the AVC-LAN of the device.

*e: Device Name List No. 2 Description

Name	Component	Connection Method
AUX/VTR	No. 1 stereo jack adapter assembly	Vehicle wire harness

(b) Unit check mode screen description

Screen Description

Display	Content
*a: Device name	Target device
*b: History DTC	Diagnostic memory results and stored DTCs are displayed.
*c: Current DTC	DTCs output in the service check are displayed.
*d: DTC	DTC (Diagnostic Trouble Code)
*e: Diagnosis clear switch	Pushing this switch for 3 seconds clears the diagnostic memory data of the target device (Both response to diagnostic system check result and the displayed data are cleared.).

(c) Read the system check result.

(1) If the check result is "DETAIL", touch the displayed check result to view the results on the "Unit Check Mode" screen and record them.

NOTICE:

A maximum of 6 DTCs can be displayed for history and present DTCs on the "Unit check mode" screen. Therefore, when 6 DTCs are displayed, troubleshoot those DTCs first and then check the "Unit check mode" screen again to see if any other DTCs are displayed.

(2) Check the details of the DTC(s) (See page ).

7. DTC CLEAR/RECHECK (CLEAR USING SYSTEM CHECK MODE SCREEN)

(a) Clear DTCs

(1) Press the "Memory CLR" switch for 3 seconds.

(2) Confirm that the check results are cleared.

(b) Recheck

(1) Press the "Recheck" switch.

(2) Confirm that all diagnostic codes are "OK" when the check results are displayed. If a code other than "OK" is displayed, troubleshoot again.

HINT:

When DTCs are cleared using the "Unit Check Mode" screen, press the "Back" switch to return to the "System Check Mode" screen and perform this operation.

8. FINISH DIAGNOSTIC MODE

(a) Turn the ignition switch off.