Toyota Tacoma (2015-2018) Service Manual: How To Proceed With Troubleshooting

Toyota Tacoma (2015-2018) Service Manual / Cruise Control / Lane Departure Alert System / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use these procedures to troubleshoot the lane departure alert system.
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	INSPECT BATTERY VOLTAGE

(a) Measure the battery voltage.

Standard voltage:

11 to 14 V

If the voltage is below 11 V, replace or recharge the battery before proceeding to the next step.

3.	CHECK CAN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the CAN communication system is functioning normally.

Click here OK:

OK:

CAN communication system is functioning normally.

GO TO CAN COMMUNICATION SYSTEM

4.	CHECK FOR DTCs

(a) Check for DTCs and note any codes that are output.

Click here (b) Clear the DTCs.

(b) Clear the DTCs.

Click here (c) Recheck for DTCs. Try to reproduce the DTCs by duplicating the conditions

Click here

Result	Proceed to
DTCs are not output	A
DTCs are output	B

GO TO DTC CHART

5.	PROBLEM SYMPTOMS TABLE

HINT:

Refer to Problem Symptoms Table.

Click here

Result	Proceed to
Fault is not listed in problem symptoms table	A
Fault is listed in problem symptoms table	B

GO TO STEP 8

6.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU

Click here (b) Data List / Active Test

(b) Data List / Active Test

Click here

7.	ADJUST, REPAIR OR REPLACE

NOTICE:

When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed.
Click here
When the forward recognition camera is replaced with a new one, adjustment of the forward recognition camera optical axis must be performed.
Click here

8.	CONFIRMATION TEST

END

System Diagram

SYSTEM DIAGRAM Communication Table Sender ECU Receiver ECU Signal Line *1: for Vacuum Brake Booster *2: for Hydraulic Brake Booster ...

Operation Check

OPERATION CHECK CHECK LANE DEPARTURE ALERT MAIN SWITCH (a) Check the lane departure alert main switch (steering pad switch assembly) on/off operation. (1) Turn the ignition switch to ON. (2) Con ...

Other materials:

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART If a DTC is displayed during the DTC check, check the parts listed in the table below and proceed to the "See page" given. *1: "Comes on" means the Malfunction Indicator Lamp (MIL) illuminates. *2: "DTC stored" means ...

System Description
SYSTEM DESCRIPTION 1. CRUISE CONTROL SYSTEM The cruise control system makes it possible to drive at a desired speed without using the accelerator pedal. ECM controls the throttle opening angle based on signals from switches and sensors. The microcomputer which controls the cruise control syst ...

Removal
REMOVAL PROCEDURE 1. REMOVE FUEL PUMP ASSEMBLY (for High Pressure) (See page ) 2. REMOVE NO. 2 FUEL PIPE SUB-ASSEMBLY (a) Loosen the 2 union nuts and remove the No. 2 fuel pipe sub-assembly from the fuel delivery pipe RH and fuel delivery pipe sub-assembly LH. Text in Illustration ...