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. |
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|
IG power source circuit |
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Speed sensor circuit |
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Check hydraulic brake booster using Techstream (Check hydraulic brake booster operation using active test function) If abnormal, check hydraulic circuit for leakage |
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|
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 |
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||
|
Yaw rate and acceleration sensor circuit |
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|
Steering angle sensor circuit |
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|
VSC OFF switch circuit |
|
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|
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 |
|
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|
ABS warning light does not come on |
ABS warning light circuit |
|
|
Master cylinder solenoid |
|
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|
BRAKE warning light remains on |
BRAKE warning light circuit |
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|
Master cylinder solenoid |
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|
BRAKE warning light does not come on |
BRAKE warning light circuit |
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|
Master cylinder solenoid |
|
|
|
TRAC OFF indicator light remains on |
TRAC OFF indicator light circuit |
|
|
Master cylinder solenoid |
|
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|
TRAC OFF indicator light does not come on |
TRAC OFF indicator light circuit |
|
|
Master cylinder solenoid |
|
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|
VSC OFF indicator light remains on |
VSC OFF indicator circuit |
|
|
Master cylinder solenoid |
|
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|
VSC OFF indicator light does not come on |
VSC OFF indicator circuit |
|
|
Master cylinder solenoid |
|
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|
AUTO LSD indicator light remains on |
AUTO LSD indicator circuit |
|
|
Master cylinder solenoid |
|
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|
AUTO LSD indicator light does not come on |
AUTO LSD indicator circuit |
|
|
Master cylinder solenoid |
|
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|
Slip indicator light remains on |
Slip indicator light circuit |
|
|
Master cylinder solenoid |
|
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|
Slip indicator light does not come on |
Slip indicator light circuit |
|
|
Master cylinder solenoid |
|
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|
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 |
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|
Master cylinder solenoid |
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|
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 |
|
.gif)
- *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:
Brake Warning Light does not Come ON
DESCRIPTION
Refer to Brake Warning Light Remains ON (See page
).
WIRING DIAGRAM
Refer to Brake Warning Light Remains ON (See page
).
CAUTION / NOTICE / HINT
NOTICE:
When replacing the skid control ECU (master cylinder solenoid), perform
calibration (See page
).
Inspect ...
Precaution
PRECAUTION
1. PRECAUTION FOR HEADLIGHT BULB REPLACEMENT
(a) When any defects such as deformation, cracks, dents, chipping, etc. are identified
on the headlight, replace it with a new one.
(b) Even if the operation seems to be normal, the fail-safe function may be defective.
(c) Since halogen b ...
Terminals Of Ecu
TERMINALS OF ECU
1. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND DRIVER SIDE JUNCTION
BLOCK
(a) Remove the main body ECU (multiplex network body ECU) from the driver side
junction block (See page ).
(b) Disconnect the 1D driver side junction block connector.
(c) Measure the voltag ...
