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:

Diagnosis System
DIAGNOSIS SYSTEM 1. DESCRIPTION The 4 wheel drive control ECU records DTCs when the ECU detects a malfunction in the ECU itself or in system circuits. The DTCs can be read through the DLC3 of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions ...

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Dynamic Radar Cruise Control System DTC No. Detection Item Link C1A02 Vehicle Information Not Obtained C1A0A Front Radar Sensor Region Code Mismatch ...

Active head restraints (Access Cab and Double Cab models only)
When the occupant’s back presses against the seatback during a rear-end collision, the head restraint moves slightly forward to help reduce the risk of whiplash on the seat occupant. ■Active head restraints Even small forces applied to the seatback may cause the head restraint to mov ...