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.
|
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 |
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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:
Data List / Active Test
DATA LIST / ACTIVE TEST
1. READ DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuators and other items to be read without removing any parts. This non-intrusive
inspection can be very useful because intermittent conditions or sig ...
Hood
Release the lock from the inside of the vehicle to open the hood.
Pull the hood release lever.
The hood will pop up slightly.
Pull up the hood catch lever and lift the hood.
Hold the hood open by inserting the supporting rod into the slot.
CAUTION
■Pre-driving check
Check that the ...
Zero Point Calibration of Yaw Rate Sensor Undone (C1210,C1336)
DESCRIPTION
The skid control ECU (brake actuator assembly) receives signals from the yaw
rate and acceleration sensor (airbag sensor assembly) via the CAN communication
system.
The airbag sensor assembly has a built-in yaw rate and acceleration sensor and
detects the vehicle condition. If th ...
