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:

Removal
REMOVAL CAUTION / NOTICE / HINT NOTICE: Release the vacuum from booster by depressing the brake pedal several times. Then remove the brake master cylinder from brake booster. PROCEDURE 1. PRECAUTION NOTICE: After turning the ignition switch off, waiting time may be required before disconnect ...

Short in Driver Side Squib 2nd Step Circuit (B1810/53-B1813/53)
DESCRIPTION The driver side squib 2nd step circuit consists of the airbag sensor assembly, the spiral cable with sensor sub-assembly and the horn button assembly. The circuit signals the SRS to deploy when airbag deployment conditions are met. These DTCs are set when a malfunction is detected i ...

Low Pitched Horn
Components COMPONENTS ILLUSTRATION Inspection INSPECTION PROCEDURE 1. INSPECT LOW PITCHED HORN ASSEMBLY (a) Check the operation. (1) Apply battery voltage to the terminal 1 and body ground, and check that the low pitched horn assembly sounds. Text in Illustration ...

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