Toyota Tacoma (2015-2018) Service Manual: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
- Use the table below to help determine the cause of the problem symptom. 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 |
|---|---|---|
|
"Low beam" does not turn on (One side) |
Headlight bulb (Low) |
- |
|
Headlight Assembly |
|
|
|
Harness or connector |
- |
|
|
"Low beam" does not turn on (Both sides) |
Low beam headlight circuit |
|
|
Harness or connector |
- |
|
|
Headlight dimmer switch circuit |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
|
|
"High beam" does not turn on (One side) |
Headlight bulb (High) |
- |
|
Headlight Assembly |
|
|
|
Harness or connector |
- |
|
|
"High beam" does not turn on (Both sides) |
High beam headlight circuit |
|
|
Harness or connector |
- |
|
|
Headlight dimmer switch circuit |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
|
|
"Flash" does not turn on (Low beam and Hi-beam are normal) |
Headlight dimmer switch circuit |
|
|
Main body ECU (Multiplex network body ECU) |
|
|
|
Headlight is dark |
Headlight bulb |
- |
|
Taillight does not turn on (All) |
Headlight dimmer switch circuit |
|
|
Taillight relay circuit |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
|
|
Only one taillight turns on |
Rear combination light assembly |
|
|
Tail and stop light bulb |
- |
|
|
Daytime running light system does not operate (Turn signal light normal) [w/ Daytime Running Light Halogen Type] |
Headlight dimmer switch circuit |
|
|
CAN communication system |
|
|
|
Parking brake switch assembly |
|
|
|
Daytime running light relay circuit |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
|
|
Combination meter assembly |
|
|
|
Daytime running light system does not operate (Turn signal light normal) [w/ Daytime Running Light LED Type] |
Headlight dimmer switch circuit |
|
|
Parking brake switch assembly |
|
|
|
Daytime running light relay circuit |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
.gif)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Automatic high beam system does not operate or operation indicator does not illuminate. |
Check automatic high beam indicator light |
|
|
Check Data List (Auto H Beam STS) |
||
|
Check Active Test (Automatic High Beam Indicator) |
||
|
Check automatic high beam main switch |
||
|
Harness or connector |
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
Light auto turn off system does not operate |
Headlight dimmer switch circuit |
|
|
Ignition switch (w/o Smart key system) |
- |
|
|
Engine switch (w/ Smart key system) |
- |
|
|
Door courtesy switch circuit |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
Front fog light does not turn on (All) |
Headlight dimmer switch circuit |
|
|
Front fog light circuit |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
|
|
Only one front fog light does not turn on |
Front fog light bulb |
- |
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
"Hazard" and "Turn" do not turn on |
Combination meter assembly |
|
|
Harness or connector |
- |
|
|
Hazard warning light does not turn on |
Hazard warning switch circuit |
|
|
Harness or connector |
- |
|
|
Combination meter assembly |
|
|
|
Turn signal does not turn on |
Meter/gauge system |
|
|
Headlight dimmer switch circuit |
|
|
|
Combination meter assembly |
|
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
Stop light does not operate (All) |
Stop light switch assembly |
|
|
Harness or connector |
- |
|
|
Rear combination light assembly |
|
|
|
Only one stop light does not operate |
Rear combination light assembly |
|
|
Center stop light does not operate |
Center stop light assembly |
|
|
Stop light switch assembly |
|
|
|
Harness or connector |
- |
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
Illuminated entry does not operate (All) |
Door courtesy switch circuit |
|
|
Interior light circuit |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
|
Symptom |
Suspected Area |
See page |
|---|---|---|
| *1: for 2WD
*2: for 4WD |
||
|
Back-up light does not operate (All) |
Park/neutral position switch*1 |
|
|
Park/neutral position switch*2 |
|
|
|
Harness or connector |
- |
|
|
Rear combination light assembly |
|
|
|
Only one back-up light does not operate |
Rear combination light assembly |
|
|
Vanity light does not operate |
Vanity light |
|
|
Harness or connector |
- |
|
|
Cargo light does not operate |
Center stop light assembly |
|
|
Cargo light circuit |
|
|
|
Harness or connector |
- |
|
|
Main body ECU (Multiplex network body ECU) |
|
|
|
Room light does not operate |
Roof console box assembly |
|
|
Harness or connector |
- |
|
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
Battery saving function (interior light auto cut function) does not operate |
Interior light auto cut circuit |
|
|
Main body ECU (Multiplex network body ECU) |
|
|
|
Harness or connector |
- |
Dtc Check / Clear
DTC CHECK / CLEAR
1. CHECK DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Tr ...
Terminals Of Ecu
TERMINALS OF ECU
1. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
Text in Illustration
*1
Main Body ECU (Multiplex Network Body ECU)
-
-
(a ...
Other materials:
Components
COMPONENTS
ILLUSTRATION
*1
RADIATOR GRILLE
-
-
ILLUSTRATION
*A
for Type A
*B
for Type B
*C
for Type C
-
-
*1
MILLIMET ...
Short in GPS Antenna (B15C0,B15C1)
DESCRIPTION
These DTCs are stored when a malfunction occurs in the navigation antenna assembly.
DTC No.
DTC Detection Condition
Trouble Area
B15C0
Navigation antenna error
Navigation antenna assembly
Navigatio ...
Parts Location
PARTS LOCATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
...
