Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: 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

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

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

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.

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

Master cylinder solenoid

ABS warning light does not come on

ABS warning light circuit

Master cylinder solenoid

BRAKE warning light remains on

BRAKE warning light circuit

Master cylinder solenoid

BRAKE warning light does not come on

BRAKE warning light circuit

Master cylinder solenoid

TRAC OFF indicator light remains on

TRAC OFF indicator light circuit

Master cylinder solenoid

TRAC OFF indicator light does not come on

TRAC OFF indicator light circuit

Master cylinder solenoid

VSC OFF indicator light remains on

VSC OFF indicator circuit

Master cylinder solenoid

VSC OFF indicator light does not come on

VSC OFF indicator circuit

Master cylinder solenoid

AUTO LSD indicator light remains on

AUTO LSD indicator circuit

Master cylinder solenoid

AUTO LSD indicator light does not come on

AUTO LSD indicator circuit

Master cylinder solenoid

Slip indicator light remains on

Slip indicator light circuit

Master cylinder solenoid

Slip indicator light does not come on

Slip indicator light circuit

Master cylinder solenoid

A-TRAC indicator light remains on*1

A-TRAC indicator light circuit

Master cylinder solenoid

A-TRAC indicator light does not come on*1

A-TRAC indicator light circuit

Master cylinder solenoid

Crawl indicator light abnormal (Remains on)*2

Crawl indicator light circuit

Master cylinder solenoid (skid control ECU)

Crawl indicator light abnormal (Does not come on)*2

Crawl indicator light circuit

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

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:

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 ...

Crawl Indicator Light Remains ON
DESCRIPTION When CRAWL starts after operating the CRAWL switch (drive monitor switch), the CRAWL indicator light turns on. While CRAWL is in the process of stopping, the CRAWL indicator light begins blinking. When CRAWL totally stops, the CRAWL indicator light turns off. WIRING DIAGRAM CA ...

Front Wiper Rubber
Components COMPONENTS ILLUSTRATION Installation INSTALLATION PROCEDURE 1. INSTALL FRONT WIPER RUBBER (a) Install the 2 wiper rubber backing plates to the front wiper rubber. NOTICE: Align the groove of the front wiper rubber backing plate with the edg ...

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