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

Toyota Tacoma (2015-2018) Service Manual / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Hydraulic Brake Booster) / Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

If a normal code is displayed during the DTC check but the problem still occurs, check the circuits for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting page.

NOTICE:

When replacing the skid control ECU (master cylinder solenoid), sensor or etc., turn the ignition switch to off.

Vehicle Stability Control System

Symptom	Suspected Area	See page
ABS, BA and/or EBD does not operate	Check for DTCs again and make sure that normal system code displayed.
	IG power source circuit
	Speed sensor circuit
	Speed sensor circuit
	Check hydraulic brake booster using Techstream (Check hydraulic brake booster operation using active test function) If abnormal, check hydraulic circuit for leakage
	If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace master cylinder solenoid.
ABS, BA and/or EBD does not operate efficiently	Check for DTCs again and make sure that normal system code displayed.
	Speed sensor circuit
	Speed sensor circuit
	Stop light switch circuit
	Check hydraulic brake booster using Techstream (Check hydraulic brake booster operation using active test function) If abnormal, check hydraulic circuit for leakage
	If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace master cylinder solenoid.
VSC and/or TRAC does not operate	Check for DTCs again and make sure that normal system code displayed.
	IG power source circuit
	Check hydraulic circuit for leakage	-
	Speed sensor circuit
	Speed sensor circuit
	Yaw rate and acceleration sensor circuit
	Steering angle sensor circuit
	VSC OFF switch circuit
	If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace master cylinder solenoid.
Sensor signal check cannot be performed	Master cylinder solenoid
DTC check cannot be performed	Check for DTCs again and make sure that normal system code displayed.
DTC check cannot be performed	If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace master cylinder solenoid.
ABS warning light remains on	ABS warning light circuit
ABS warning light remains on	Master cylinder solenoid
ABS warning light does not come on	ABS warning light circuit
ABS warning light does not come on	Master cylinder solenoid
BRAKE warning light remains on	BRAKE warning light circuit
BRAKE warning light remains on	Master cylinder solenoid
BRAKE warning light does not come on	BRAKE warning light circuit
BRAKE warning light does not come on	Master cylinder solenoid
TRAC OFF indicator light remains on	TRAC OFF indicator light circuit
TRAC OFF indicator light remains on	Master cylinder solenoid
TRAC OFF indicator light does not come on	TRAC OFF indicator light circuit
TRAC OFF indicator light does not come on	Master cylinder solenoid
VSC OFF indicator light remains on	VSC OFF indicator circuit
VSC OFF indicator light remains on	Master cylinder solenoid
VSC OFF indicator light does not come on	VSC OFF indicator circuit
VSC OFF indicator light does not come on	Master cylinder solenoid
AUTO LSD indicator light remains on	AUTO LSD indicator circuit
AUTO LSD indicator light remains on	Master cylinder solenoid
AUTO LSD indicator light does not come on	AUTO LSD indicator circuit
AUTO LSD indicator light does not come on	Master cylinder solenoid
Slip indicator light remains on	Slip indicator light circuit
Slip indicator light remains on	Master cylinder solenoid
Slip indicator light does not come on	Slip indicator light circuit
Slip indicator light does not come on	Master cylinder solenoid
A-TRAC indicator light remains on*1	A-TRAC indicator light circuit
A-TRAC indicator light remains on*1	Master cylinder solenoid
A-TRAC indicator light does not come on*1	A-TRAC indicator light circuit
A-TRAC indicator light does not come on*1	Master cylinder solenoid
Crawl indicator light abnormal (Remains on)*2	Crawl indicator light circuit
Crawl indicator light abnormal (Remains on)*2	Master cylinder solenoid (skid control ECU)
Crawl indicator light abnormal (Does not come on)*2	Crawl indicator light circuit
Crawl indicator light abnormal (Does not come on)*2	Master cylinder solenoid (skid control ECU)
Multi-terrain select indicator light abnormal (Remains on)*2	Multi-terrain select indicator light circuit
	Master cylinder solenoid
Multi-terrain select indicator light abnormal (Does not come on)*2	Multi-terrain select indicator light circuit
	Master cylinder solenoid
VSC warning buzzer abnormal	VSC warning buzzer circuit
VSC warning buzzer abnormal	Master cylinder solenoid

*1: for Manual Transmission
*2: for Automatic Transmission

Calibration

CALIBRATION 1. DESCRIPTION (a) After replacing the VSC relevant components or performing "Front wheel alignment adjustment", clearing and reading the sensor calibration data are necessar ...

Test Mode Procedure

TEST MODE PROCEDURE 1. TEST MODE PROCEDURE (for Using Techstream) HINT: If the ignition switch is turned from the ON to the ACC or LOCK position during test mode, DTCs related to the si ...

Other materials:

Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the ignition switch to ON. (c) Turn the Techstream on. (d) Enter the following menus: Chassis / LKA/LDA / Trouble Codes. (e) Check for DTCs. Click here CLEAR DTC (a) Connect the Techstream to the DLC3. (b) Turn ...

Open in Pump Motor Circuit (C1251)
DESCRIPTION The motor relay (semiconductor relay) is built into the master cylinder solenoid and drives the pump motor based on a signal from the skid control ECU (master cylinder solenoid). DTC No. DTC Detecting Condition Trouble Areas C1251 ...

Auxiliary boxes
Front Pull the lid down. Under the rear seats (Access Cab models) Pull up the lever. Raise the bottom cushion up. Turn the knob counterclockwise. Open the lid. Press the lid against the bottom of the lower cushion until it is supported by the hookand- loop fastener. Make sur ...