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

Toyota Tacoma (2015-2018) Service Manual / Pre-collision / Pre-collision System / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use the following procedure to troubleshoot the pre-collision 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.	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.

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

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

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

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

(k) Calculate the Dealership Axis Offset Angle (with On-line Calibration Angle) using the values of 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 if the CAN communication system is functioning normally.

HINT:

Refer to Communication Bus Check in CAN Communication System.

Click here OK:

OK:

CAN communication system is functioning normally.

GO TO CAN COMMUNICATION SYSTEM

5.	INSPECT WARNING LIGHT

(a) Check the condition of the warning lights on the combination meter assembly.

Result	Proceed to
Warning lights other than the PCS warning light are not illuminated or flashing	A
Warning lights other than the PCS warning light are illuminated or flashing	B

GO TO MALFUNCTIONING SYSTEM

6.	INSPECT MULTI-INFORMATION DISPLAY

(a) Check if a pre-collision system warning message is displayed on the multi-information display in the combination meter assembly.

Result	Proceed to
"Pre-Collision System Malfunction Visit Your Dealer" is displayed	A
Any of the following messages is displayed: "Pre-Collision System Unavailable" "Pre-Collision System Unavailable Clean Sensor" "Front Camera Unavailable" "Front Camera Unavailable Remove Debris On Windshield"	B
Warning message is not displayed	C

GO TO PROBLEM SYMPTOMS TABLE

CHECK CONDITIONS WHEN PRE-COLLISION SYSTEM DID NOT OPERATE

7.	CHECK FOR DTCs* (PRE-COLLISION SYSTEM)

HINT:

Refer to DTC Check / Clear.

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

(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.

(1) Attempt to duplicate the malfunction and check if the same DTCs are output again.

Click here

Result	Proceed to
Malfunction is duplicated but DTCs are not output	A
Malfunction cannot be duplicated and DTCs are not output	B
DTCs are output	C

GO TO SYMPTOM SIMULATION

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

GO TO STEP 11

9.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU

Click here (b) Data List / Active Test

(b) Data List / Active Test

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

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