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:
Removal
REMOVAL
PROCEDURE
1. REMOVE FUEL DELIVERY PIPE ASSEMBLY LH (FUEL PRESSURE SENSOR)
(See page )
NOTICE:
Do not remove the fuel pressure sensor from the fuel delivery pipe sub-assembly
LH.
If a fuel pressure sensor is removed, replace the fuel delivery pipe
sub-assembly LH (fu ...
Transfer Case Rear Oil Seal
Components
COMPONENTS
ILLUSTRATION
Replacement
REPLACEMENT
PROCEDURE
1. DRAIN TRANSFER OIL
2. REMOVE PROPELLER WITH CENTER BEARING SHAFT ASSEMBLY
(See page )
3. REMOVE OUTPUT SHAFT COMPANION FLANGE SUB-ASSEMBLY
4. REMOVE TRANSFER EXTENSION HOUSING TYPE T OIL SEAL
( ...
Extension Module Malfunction (B1552,B158A,B15BA)
DESCRIPTION
These DTCs are stored when a malfunction occurs in the stereo component tuner
assembly.
DTC No.
DTC Detection Condition
Trouble Area
B1552
Internal malfunction of the navigation ECU
Stereo component tuner assembl ...
