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:

Satellite Radio Broadcast cannot be Selected or After Selecting Broadcast, Broadcast cannot be Added into Memory
CAUTION / NOTICE / HINT NOTICE: Some satellite radio broadcasts require payment. A contract must be made between a satellite radio company and the user. If the contract expires, it will not be possible to listen to the broadcast. PROCEDURE 1. CHECK NAVIGATION RECEIVER ...

Pressure Control Solenoid "G" Actuator Stuck Off (P28077F)
SYSTEM DESCRIPTION The ECM uses the vehicle speed signal and signals from the transmission revolution sensors (NT, SP2) to detect the actual gear (1st, 2nd, 3rd, 4th, 5th or 6th gear). The ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical problems of t ...

Removal
REMOVAL CAUTION / NOTICE / HINT HINT: Use the same procedures for both the LH and RH sides. The procedure described below is for the LH side. PROCEDURE 1. REMOVE FRONT DOOR LOWER FRAME BRACKET GARNISH 2. REMOVE FRONT DOOR INSIDE HANDLE BEZEL PLUG 3. REMOVE FRONT ...

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