Toyota Tacoma (2015-2018) Service Manual: Problem Symptoms Table

Toyota Tacoma (2015-2018) Service Manual / Pre-collision / Pre-collision System / 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 symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
The pre-collision system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.

Pre-collision System

Symptom	Suspected Area	Link
"Pre-Collision System Unavailable" is displayed	Perform millimeter wave radar sensor assembly adjustment*1
	Millimeter wave radar sensor assembly
	Combination meter assembly
"Pre-Collision System Unavailable Clean Sensor" is displayed	Foreign matter attached to millimeter wave radar sensor assembly	-
	Millimeter wave radar sensor assembly
	Combination meter assembly
"Front Camera Unavailable" is displayed	Check current condition of forward recognition camera based on related Data List items. Abnormal forward recognition camera voltage Forward recognition camera temperature outside of operational range
	Forward recognition camera
	Combination meter assembly
	Millimeter wave radar sensor assembly
"Front Camera Unavailable Remove Debris On Windshield" is displayed	The forward recognition camera or windshield glass within the field of view of the forward recognition camera is dirty or fogged up	-
	Forward recognition camera
	Combination meter assembly
	Millimeter wave radar sensor assembly
Although there is possibility of collision, pre-collision controls (all controls) do not operate ("Pre-collision System Unavailable" is not displayed)	Check if pre-collision system is canceled	-
	Vehicle condition/environment does not match the pre-collision system operation conditions (Confirm control operation conditions)
	Check installation condition of millimeter wave radar sensor assembly
	Perform millimeter wave radar sensor assembly adjustment
	Millimeter wave radar sensor assembly
	Check installation condition of forward recognition camera
	Perform forward recognition camera adjustment
	Forward recognition camera
Although there is no possibility of collision, pre-collision controls (all controls) operate	Vehicle condition/environment does not match the pre-collision system operation conditions (Confirm control operation conditions)
	Check installation condition of millimeter wave radar sensor assembly
	Perform millimeter wave radar sensor assembly adjustment
	Millimeter wave radar sensor assembly
	Check installation condition of forward recognition camera
	Perform forward recognition camera adjustment
	Forward recognition camera
Pre-collision system does not operate	Check if pre-collision system is canceled	-
	ECU power source circuit
	Millimeter wave radar sensor assembly
Pre-collision system cannot be canceled (PCS warning light does not illuminate)	Check steering pad switch assembly condition	-
	Combination meter assembly (check if indicator illuminates using Active Test)
	Millimeter wave radar sensor assembly
	Combination meter assembly
Pre-collision system warning timing cannot be changed (warning timing setting screen not displayed on multi-information display)	Millimeter wave radar sensor assembly
	Combination meter assembly

*1: If error code 7 is output during beam axis alignment, clear the DTCs and perform beam axis alignment again.

Operation Check

OPERATION CHECK CHECK PRE-COLLISION SYSTEM SETTING (a) Turn the ignition switch to ON. (b) Operate the steering pad switch assembly to change the setting of PCS on the multi-information display t ...

Terminals Of Ecu

TERMINALS OF ECU CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY (a) Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Wir ...

Other materials:

Open in Bus 2 Main Bus Line
DESCRIPTION There may be an open circuit in one of the CAN main bus lines and/or a central gateway ECU (network gateway ECU) branch lines when the resistance between terminals 18 (CA4H) and 17 (CA4L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher. Detection It ...

Registration
REGISTRATION CAUTION / NOTICE / HINT HINT: Register a new recognition code when replacing the door control transmitter module set sub-assembly or the door control receiver. Add mode is used to retain the already registered codes while registering a new recognition code. This m ...

Yaw Rate Sensor Circuit (C1AA4,C1AA5)
DESCRIPTION The forward recognition camera receives vehicle stability signals from the yaw rate and acceleration sensor (airbag sensor assembly). If the yaw rate and acceleration sensor (airbag sensor assembly) detects an abnormal yaw rate sensor signal or yaw rate sensor assembly power suppl ...