Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Brake System (P157800)

DESCRIPTION

This DTC is output when the VSC system has a problem. Check the VSC system when this DTC is output.

DTC No.

DTC Detection Condition

Trouble Area

MIL

Note

P157800

  • Diagnosis Condition:

    Cruise control in operation

  • Malfunction Status:

    Brake System Malfunction

  • VSC system
  • ECM

Does not come on

SAE: P1578

CAUTION / NOTICE / HINT

HINT:

When this DTC is output, confirm that the vehicle stability control system is normal since it may be malfunctioning.

for Hydraulic Brake Booster: See page for Vacuum Brake Booster: See page

for Vacuum Brake Booster: See page PROCEDURE

PROCEDURE

1.

CHECK FOR DTC (ABS/VSC/TRAC)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch on.

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.

(e) Check for DTCs (See page OK: ).

OK:

Vehicle stability control system DTCs are not output

Result

Result

Proceed to

OK

A

NG (for Hydraulic Brake Booster)

B

NG (for Vacuum Brake Booster)

C

B

GO TO VEHICLE STABILITY CONTROL SYSTEM

C

GO TO VEHICLE STABILITY CONTROL SYSTEM

A

2.

CHECK FOR DTC (DTC P157800)

(a) Clear the DTCs (See page (b) Perform the following to make sure that the DTC detection conditions are ).

(b) Perform the following to make sure that the DTC detection conditions are met.

HINT:

If the detection conditions are not met, the malfunction cannot be detected.

(1) Drive the vehicle at a speed for which cruise control operation is possible.

(2) Turn the cruise control system on using the cruise control main switch (ON/OFF).

(3) Push the cruise control main switch to -SET to begin control of vehicle speed using the cruise control system.

(c) Turn the Techstream on.

(d) Perform the following to make sure that the DTC detection conditions are met.

HINT:

If the detection conditions are not met, the malfunction cannot be detected.

(1) Drive the vehicle at a speed for which cruise control operation is possible.

(2) Turn the cruise control system on using the cruise control main switch (ON/OFF).

(3) Push the cruise control main switch to -/SET to begin control of vehicle speed by the cruise control system.

(e) Check the DTCs (See page OK: ).

OK:

DTC P157800 is not output

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE ECM

Brake Switch "A" Circuit Open (P057113)
DESCRIPTION DTC No. DTC Detection Condition Trouble Area MIL Note P057113 Vehicle Condition: Cruise ...

Clutch Switch Circuit
DESCRIPTION Clutch switch circuit inspection is necessary for manual transmission vehicles. When the clutch pedal is released, the ECM receives the positive (+) battery voltage through the ECU-IG ...

Other materials:

Parts Location
PARTS LOCATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ...

Output Speed Sensor Circuit Short to Battery (P072012,P072014,P072031)
DESCRIPTION This sensor detects the rotation speed of the transmission output shaft and sends signals to the ECM. By comparing the input turbine speed signal (NT) with the output shaft speed sensor signal (SP2), the ECM detects the shift timing of the gears and appropriately controls the engi ...

Installation
INSTALLATION PROCEDURE 1. INSTALL OCCUPANT DETECTION ECU (a) Check that the ignition switch is OFF. (b) Check that the cable is disconnected from the battery negative (-) terminal is disconnected. CAUTION: After removing the cable from the terminal, wait for at least 90 seconds before star ...

В© 2011-2019 Copyright www.ttguide.net