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:

Terminals Of Ecu
TERMINALS OF ECU 1. CHECK ENGINE SWITCH (a) Measure the resistance and voltage according to the value(s) in the table below. Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition ...

Precaution
PRECAUTION 1. HANDLING PRECAUTIONS ON STEERING SYSTEM (a) Care must be taken when replacing parts. Incorrect replacement may affect the performance of the steering system and result in driving hazards. 2. HANDLING PRECAUTIONS ON SRS AIRBAG SYSTEM (a) The vehicle is equipped with a SRS (Supplem ...

Installation
INSTALLATION CAUTION / NOTICE / HINT NOTICE: Replace the blind spot monitor sensor if it has been dropped or subjected to a severe impact. PROCEDURE 1. INSTALL BLIND SPOT MONITOR SENSOR LH (a) Install the blind spot monitor sensor LH with the 3 nuts. Torque: 9.0 N·m {92 kgf·cm, 80 in·l ...

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