Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Turn Signal Switch Circuit

DESCRIPTION

The combination meter assembly receives the turn signal switch information and controls the turn signal lights.

WIRING DIAGRAM

PROCEDURE

PROCEDURE

1.

READ VALUE USING TECHSTREAM (TURN SIGNAL SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Data List.

(e) According to the display on the Techstream, read the Data List.

Combination Meter

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Turn Signal Switch (Right)

Turn signal switch (right) signal / ON or OFF

ON: Turn signal switch (right) on

OFF: Turn signal switch (right) off

-

Turn Signal Switch (Left)

Turn signal switch (left) signal / ON or OFF

ON: Turn signal switch (left) on

OFF: Turn signal switch (left) off

-

Turn Switch Signal (Full Turn)

Turn signal switch (full turn) signal / ON or OFF

ON: Turn signal switch (left or right) on

OFF: Turn signal switch (left and right) off

-

OK:

Normal conditions listed above are displayed.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY

(a) Remove the C11 headlight dimmer switch assembly.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

12 (TR) - 15 (EL)

Turn signal switch in neutral position

10 kΩ or higher

11 (TL) - 15 (EL)

Turn signal switch in neutral position

10 kΩ or higher

13 (CR) - 15 (EL)

Turn signal switch in neutral position

10 kΩ or higher

12 (TR) - 15 (EL)

Turn signal switch in right turn position

Below 1 Ω

13 (CR) - 15 (EL)

Turn signal switch in full right turn position

Below 1 Ω

11 (TL) - 15 (EL)

Turn signal switch in left turn position

Below 1 Ω

13 (CR) - 15 (EL)

Turn signal switch in full left turn position

Below 1 Ω

Text in Illustration

*1

Component without harness connected

(Headlight Dimmer Switch Assembly)

NG

REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY

OK

3.

CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH ASSEMBLY - COMBINATION METERASSEMBLY AND BODY GROUND)

(a) Disconnect the C9 combination meter assembly connector.

(b) Disconnect the C11 headlight dimmer switch assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

C11-12 (TR) - C9-8 (ER)

Always

Below 1 Ω

C11-11 (TL) - C9-7 (EL)

Always

Below 1 Ω

C11-13 (CR) - C9-9 (SW)

Always

Below 1 Ω

C11-12 (TR) - Body ground

Always

10 kΩ or higher

C11-11 (TL) - Body ground

Always

10 kΩ or higher

C11-13 (CR) - Body ground

Always

10 kΩ or higher

C11-15 (EL) - Body ground

Always

Below 1 Ω

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

IG Signal Circuit
DESCRIPTION This circuit detects whether the ignition switch is ON or off, and sends this information to the main body ECU (multiplex network body ECU). WIRING DIAGRAM CAUTION / NOTICE / HINT ...

ACC Signal Circuit
DESCRIPTION This circuit detects whether the ignition switch is ACC or off, and sends this information to the main body ECU (multiplex network body ECU). WIRING DIAGRAM CAUTION / NOTICE / HINT ...

Other materials:

Check Bus 3 Line for Short to +B
DESCRIPTION There may be a short circuit between one of the CAN bus lines and +B when no resistance exists between terminal 6 (CA3H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 21 (CA3L) of the central gateway ECU (network gateway ECU) and t ...

If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs adjustment or repair. Contact your Toyota dealer as soon as possible. ■ Visible sympt ● Fluid leaks under the vehicle (Water dripping from the air conditioning after use is normal.) ● Flat-looking tires ...

Parts Location
PARTS LOCATION ILLUSTRATION *A for Vacuum Brake Booster *B for Hydraulic Brake Booster *1 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) *2 SKID CONTROL ECU (MASTER CYLINDER SOLENOID) *3 ...

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