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:
System Description
SYSTEM DESCRIPTION
1. FUNCTION DESCRIPTION
(a) ABS (Anti-lock Brake System)
(1) The ABS helps prevent the wheels from locking when the brakes are applied
firmly or when braking on a slippery surface.
(b) EBD (Electronic Brake force Distribution)
(1) The EBD control utilizes ABS, and performs ...
Air Inlet Damper Control Servo Motor Circuit (B1442/42)
DESCRIPTION
This No. 1 air conditioning servo assembly (fresh/recirculation damper) is controlled
by the air conditioning amplifier assembly and moves the air inlet damper to the
desired position.
DTC No.
DTC Detection Condition
Trouble Area
B1 ...
TC and CG Terminal Circuit
DESCRIPTION
Tire pressure warning system DTCs can be checked by connecting terminals 13 (TC)
and 4 (CG) of the DLC3. The DTCs are indicated by blinking the tire pressure warning
light.
WIRING DIAGRAM
PROCEDURE
1.
CHECK CAN COMMUNICATION SYSTEM
(a) Check for ...
