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

Toyota Tacoma (2015-2018) Service Manual / Cruise Control / Dynamic Radar Cruise Control System(for 2gr-fks) / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Perform the following procedure to troubleshoot the dynamic radar cruise control system.
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	INSPECT BATTERY VOLTAGE

(a) Measure the battery voltage with the ignition switch off.

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.	INSPECT MILLIMETER WAVE RADAR SENSOR ASSEMBLY (BEAM AXIS MISALIGNMENT READING)*

(a) Adjust the reflector height.

Click here (b) Place the reflector.

(b) Place the reflector.

Click here (c) Connect the Techstream to the DLC3.

(d) Turn the ignition switch to ON.

(e) Turn the Techstream on.

(f) Turn the cruise control main switch (ON-OFF) on.

(g) Enter the following menus: Body Electrical / Pre-Collision 2 / Utility / Front Beam Axis Misalignment Reading.

(h) Check the amount of misalignment and make a note.

(i) Enter the following menus: Body Electrical / Pre-Collision 2 / Utility / Front Beam Axis Offset Reading.

(j) Check the amount of misalignment and make a note.

(k) Calculate the "Dealership Axis Offset Angle (with On-line Calibration Angle)" using the values "Front Beam Axis Misalignment Reading" and "Front Beam Axis Offset Reading".

(1) "Dealership Axis Offset Angle (with On-line Calibration Angle)" = "Front Beam Axis Misalignment Reading" - "Front Beam Axis Offset Reading"

Standard:

Dealership Axis Offset Angle (with On-line Calibration Angle)

Vertical	-5.2 to 5.2 deg.
Horizontal	-0.6 to 0.6 deg.

Result	Proceed to
The dealership axis offset angle (with on-line calibration angle) is within the specified range.	A
The dealership axis offset angle (with on-line calibration angle) is not within the specified range.	B

GO TO STEP 12

4.	CHECK CAN COMMUNICATION SYSTEM*

(a) Using the Techstream, check that the CAN communication system is functioning normally.

Click here

Result	Proceed to
CAN communication system DTCs are not output	A
CAN communication system DTCs are output	B

GO TO CAN COMMUNICATION SYSTEM

5.	CHECK METER / GAUGE SYSTEM*

(a) Use the Techstream to check if the meter / gauge system is functioning normally.

Click here

Result	Proceed to
Meter / gauge system DTCs are not output	A
Meter / gauge system DTCs are output	B

GO TO METER / GAUGE SYSTEM

6.	CHECK VEHICLE STABILITY CONTROL SYSTEM

(a) Use the Techstream to check if the vehicle stability control system is functioning normally.

for Hydraulic Brake Booster: Click here
for Vacuum Brake Booster: Click here

Result	Proceed to
Vehicle stability control system DTCs are not output	A
Vehicle stability control system DTCs are output (for Hydraulic Brake Booster)	B
Vehicle stability control system DTCs are output (for Vacuum Brake Booster)	C

GO TO VEHICLE STABILITY CONTROL SYSTEM

7.	CHECK FOR DTCs (DYNAMIC RADAR CRUISE CONTROL SYSTEM)

(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

8.	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

ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE

9.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Data List / Active Test

Click here (b) Road test

(b) Road test

Click here (c) Operation check

Click here (d) Terminals of ECU

(d) Terminals of ECU

Click here

10.	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

11.	CONFIRMATION TEST

END

12.	ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY

(a) Perform millimeter wave radar sensor assembly adjustment.

Click here

GO TO STEP 4

System Diagram

SYSTEM DIAGRAM Communication Table Sender Receiver Signal Line ECM Millimeter Wave Radar Sensor Assembly ...

System Description

SYSTEM DESCRIPTION GENERAL The cruise control main switch is used to turn the dynamic radar cruise control system on and off, as well as operate 7 functions: SET, - (COAST), TAP-DOWN, RES (RESUM ...

Other materials:

Adjustment
ADJUSTMENT CAUTION / NOTICE / HINT CAUTION: Radiofrequency radiation exposure information: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be kept with minimum distance of 20 cm (7.87 in.) between the ...

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 sy ...

Front Speed Sensor RH Malfunction (C1401,C1402)
DESCRIPTION The speed sensor detects wheel speed and sends the appropriate signals to the skid control ECU (brake actuator assembly). These signals are used for brake control. The speed sensor rotors have rows of alternating N and S magnetic poles and their magnetic fields change when the roto ...