Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Diagnosis System

DIAGNOSIS SYSTEM

1. DIAGNOSIS

(a) If the skid control ECU (master cylinder solenoid) detects a malfunction, the ABS and/or BRAKE warning lights and the slip indicator lights come on in accordance with the trouble area to warn the driver.

HINT:

  • The DTCs are simultaneously stored in the memory. The DTCs can be read by connecting the Techstream.
  • This system has a Test Mode sensor signal check function. Test mode DTCs can be read by connecting the Techstream and observing the blinking pattern of the ABS warning light and slip indicator light.

NOTICE:

If parts connected to the IG terminal circuit are damaged due to high voltage, DTCs may not be able to be output from the ABS warning light and slip indicator light by connecting SST to the DLC3. In this case, inspect the IG power source circuit.

2. WARNING LIGHT AND INDICATOR LIGHT CHECK

(a) Release the parking brake.

CAUTION:

When releasing the parking brake, set chocks to hold the vehicle for safety.

HINT:

When the parking brake is applied or the level of the brake fluid is low, the BRAKE warning light comes on.

(b) Check that the ABS warning light, BRAKE warning light and slip indicator light come on when the ignition switch is turned to ON, and go off in approximately 3 seconds.

HINT:

If the indicator remains on or does not come on, proceed to troubleshooting for the light circuit below.

Trouble Area

See Page

ABS warning light circuit (Remains on)

ABS warning light circuit (Does not come on)

BRAKE warning light circuit (Remains on)

BRAKE warning light circuit (Does not come on)

Slip indicator light circuit (Remains on)

Slip indicator light circuit (Does not come on)

Terminals Of Ecu
TERMINALS OF ECU 1. TERMINALS OF ECU Text in Illustration *a Component without harness connected (Skid Control ECU (Master Cylinder Solenoid)) - - ...

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

Other materials:

Road Test
ROAD TEST 1. PROBLEM SYMPTOM CONFIRMATION (a) Based on the result of the customer problem analysis, try to reproduce the symptoms. If the problem is that the transmission does not shift up or down, or that the shift point is too high or too low, conduct the following road test referring to t ...

Installation
INSTALLATION CAUTION / NOTICE / HINT HINT: The following procedures are for BD20 (w/o Differential Lock). PROCEDURE 1. INSTALL REAR DIFFERENTIAL CARRIER ASSEMBLY (a) Clean the contact surfaces of the rear differential carrier assembly and axle housing. (b) Install the rear differ ...

Speaker Circuit
DESCRIPTION If there is a short in a speaker circuit, the radio and display receiver assembly detects it and stops output to the speakers. Thus sound cannot be heard from the speakers even if there is no malfunction in the radio and display receiver assembly or speakers. If a ...

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