Toyota Tacoma manuals

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

DESCRIPTION

This DTC is stored when a malfunction is detected in the vehicle stability control system.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

P157800

Brake System

While the ignition switch is ON and the dynamic radar cruise control system is operating, a malfunction in the vehicle stability control system is detected for 0.2 seconds or more.

  • Vehicle stability control system
  • ECM

Does not come on

CAUTION / NOTICE / HINT

NOTICE:

  • First check the CAN communication system by following How to Proceed with Troubleshooting. After checking that there are no malfunctions in the CAN communication system, proceed with troubleshooting

    Click here Click here

    Click here

  • Before replacing the ECM, refer to Registration.

    w/o Smart Key System: Click here w/ Smart Key System: Click here

    w/ Smart Key System: Click here

PROCEDURE

1.

CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM)

(a) Check for DTCs.

  • for Hydraulic Brake Booster: Click here for Vacuum Brake Booster: Click here
  • for Vacuum Brake Booster: Click here

Result

Proceed to

DTCs are not output

A

DTCs are output (for Hydraulic Brake Booster)

B

DTCs are output (for Vacuum Brake Booster)

C

B

GO TO VEHICLE STABILITY CONTROL SYSTEM

C

GO TO VEHICLE STABILITY CONTROL SYSTEM

A

2.

CHECK FOR DTCs (CRUISE CONTROL SYSTEM)

(a) Clear the DTCs.

Click here (b) Perform the following procedure.

(b) Perform the following procedure.

HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.

  1. Turn the ignition switch to ON.
  2. Turn the dynamic radar cruise control system on using the cruise control main switch.
  3. Wait for 1 second or more.

(c) Check for DTCs.

Click here

Result

Proceed to

DTC P157800 is not output

A

DTC P157800 is output

B

A

USE SIMULATION METHOD TO CHECK

B

REPLACE ECM

Lost Communication With ECM/PCM "A" Missing Message (U010087,U010487,U012287)
DESCRIPTION The ECM communicates with each sensor and ECU via CAN communication. If any malfunction is detected in a CAN communication circuit, one or more CAN communication system DTCs are stored ...

Cruise Control Input Processor (P160700)
DESCRIPTION The ECM continuously monitors its main and sub CPUs. This self-check ensures that the ECM is functioning properly. If outputs from the CPUs are different and deviate from the standard ...

Other materials:

Removal
REMOVAL CAUTION / NOTICE / HINT HINT: Use the same procedure for both the LH and RH sides. The procedure described below is for the LH side. PROCEDURE 1. REMOVE FRONT BUMPER ASSEMBLY (See page ) 2. REMOVE HEADLIGHT ASSEMBLY (a) Apply protective tape around the headlight ...

Back-up Power Source Circuit
DESCRIPTION The back-up power source circuit for the air conditioning amplifier assembly is shown below. Power is supplied even when the ignition switch is off. The power is used for diagnostic trouble code memory, etc. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for ...

Cellular Phone Registration Failure, Phone Directory Transfer Failure
PROCEDURE 1. CHECK OPERATION (a) Place the cellular phone close to the navigation receiver assembly. (b) Check if the cellular phone can be registered. OK: The cellular phone can be registered. OK NORMAL OPERATION ...

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