Toyota Tacoma manuals

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.
Touch Select 2-4 and High-low System

Symptom

Suspected Area

See page

While in 2WD, even when the transfer position switch is turned to a position other than 2WD, the 4WD indicator light (green) and 4LO indicator light do not illuminate

ECU power source circuit

CAN communication system

Combination meter assembly

Transfer position switch

4 wheel drive control ECU

While in 4WD, even when the transfer position switch is turned to a position other than H4, the 4WD indicator light (green) remains on and the 4LO indicator light does not illuminate

ECU power source circuit

Clutch start switch circuit (for Manual Transmission)

Transfer position switch

4 wheel drive control ECU

While in 4WD, even when the transfer position switch is turned to a position other than L4, the 4WD indicator light (green) and 4LO indicator light remain illuminated

ECU power source circuit

Transfer position switch

4 wheel drive control ECU

CAN communication system

The 4WD indicator light (green) continues blinking after the transfer position switch is operated

ECU power source circuit

Transfer shift actuator assembly (transfer shift motor)

A.D.D. actuator (differential vacuum actuator assembly) (A.D.D. shift motor)

Transfer shift actuator assembly (limit switch, 4WD detection switch or L4 detection switch)

A.D.D. actuator (differential vacuum actuator assembly) (limit switch or A.D.D. position switch)

4 wheel drive control ECU

The 4LO indicator light continues blinking after the transfer position switch is operated

ECU power source circuit

Clutch start switch circuit (for Manual Transmission)

Transfer shift actuator assembly (transfer shift motor)

Transfer shift actuator assembly (limit switch, 4WD detection switch or L4 detection switch)

4 wheel drive control ECU

Blinking: Blinks at 0.5 second intervals (0.5 seconds on and 0.5 seconds off)

Dtc Check / Clear
DTC CHECK / CLEAR 1. CHECK DTC (a) Check the DTCs. (1) Turn the ignition switch off. (2) Connect the Techstream to the DLC3. (3) Turn the ignition switch to ON. (4) Turn the Techstream on. (5) ...

Terminals Of Ecu
TERMINALS OF ECU 1. CHECK 4 WHEEL DRIVE CONTROL ECU Text in Illustration *a Component with harness connected (4 Wheel Drive Control ECU) - - ...

Other materials:

Installation
INSTALLATION PROCEDURE 1. INSTALL CLUTCH DISC ASSEMBLY (a) Insert SST into the clutch disc assembly, and then install SST and the clutch disc assembly together to the flywheel sub-assembly. Text in Illustration Flywheel Sub-assembly Side SST: 09301-00220 NOTICE ...

Oil Pressure Switch
Components COMPONENTS ILLUSTRATION Removal REMOVAL PROCEDURE 1. REMOVE ENGINE OIL PRESSURE SWITCH ASSEMBLY (a) Disengage the clamp and disconnect the engine oil pressure switch connector. (b) Using a 24 mm deep socket ...

Adjustment
ADJUSTMENT PROCEDURE 1. PREPARE VEHICLE FOR HEADLIGHT AIM ADJUSTMENT (a) Prepare the vehicle: Ensure that there is no damage or deformation to the body around the headlights. Fill the fuel tank. Make sure that the oil is filled to the specified level. Make sure that the co ...

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