Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: 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.
Differential System (w/ Differential Lock)

Symptom

Suspected Area

See page

Oil leak from front differential

Oil (level too high or wrong grade)

Front differential side gear shaft oil seal (worn or damaged)

Companion flange (loose or damaged)

Oil leak from rear differential

Oil (level too high or wrong grade)

Rear differential carrier oil seal (worn or damaged)

Companion flange (loose or damaged)

Oil leak from front drive pinion shaft

Oil (level too high or wrong grade)

Front differential carrier oil seal (worn or damaged)

Companion flange (loose or damaged)

Oil leak from rear drive pinion shaft

Oil (level too high or wrong grade)

Rear differential carrier oil seal (worn or damaged)

Companion flange (loose or damaged)

After differential lock switch is operated, rear differential lock indicator light remains off or illuminated

ECU power source circuit

Differential lock switch

4 wheel drive control ECU

CAN communication system

Combination meter assembly

How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: Use the following procedure listed to troubleshoot the differential system (w/ Differential Lock). *: Use the Techstream. PROCEDURE 1 ...

System Description
SYSTEM DESCRIPTION 1. DESCRIPTION The differential system (w/ Differential Lock) directly connects the rear left and right wheels so that even if one wheel slips while driving where d ...

Other materials:

Installation
INSTALLATION PROCEDURE 1. INSTALL REAR DOOR GLASS SUB-ASSEMBLY (a) Clean and shape the contact surface of the vehicle body. Text in Illustration *a Adhesive *b Vehicle Body (1) Using a ...

Key-off Operation Function Operates even if Operating Conditions are not Satisfied
DESCRIPTION When the front doors are closed, each power window regulator motor assembly can control its power window operation for approximately 43 seconds after the ignition switch is turned from ON to off by receiving operation permission signals from the main body ECU. How ...

CD cannot be Inserted / Played or CD is Ejected Right After Insertion
PROCEDURE 1. CHECK IF A PROPER CD IS INSERTED (a) Make sure that the CD is an audio CD or a CD with an MP3, WMA or AAC file, and that it is not deformed, flawed, stained, deteriorated or otherwise defective. OK: CD is normal. HINT: Translucent or uniq ...

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