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Toyota Tacoma (2015-2018) Service Manual / Cruise Control / Cruise Control System(for 2gr-fks) / Brake Switch "A" Signal Compare Failure (P057162)

Toyota Tacoma (2015-2018) Service Manual: Brake Switch "A" Signal Compare Failure (P057162)

DESCRIPTION

When the brake pedal is depressed, stop light switch assembly sends a signal to the ECM. Upon receiving the signal, the ECM cancels the cruise control system.

DTC Code

DTC Detection Condition

Trouble Area

MIL

Note

P057162
  • Vehicle Condition:

    Ignition switch on, cruise control main switch on

  • Malfunction Status:

    Stop light switch assembly malfunction input signal
  • Stop light switch assembly
  • Harness or connector
  • ECM

Does not come on

SAE: P0571

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - BATTERY)

(a) Disconnect the stop light switch assembly connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

S10-2 - Body ground

Always

11 to 14 V

S10-4 - Body ground

Ignition switch on

11 to 14 V

Ignition switch off

Below 1 V
Text in Illustration

*a

Front view of wire harness connector

(to Stop Light Switch Assembly)
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

2.

CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH INPUT CIRCUIT)

(a) Disconnect the ECM connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

E13-15 (ST1-) - Body ground

Ignition switch on,

brake pedal released

7.5 to 14 V

Ignition switch on,

brake pedal depressed

Below 1.5 V

E14-10 (STP) - Body ground

Brake pedal released

Below 1.5 V

Brake pedal depressed

7.5 to 14 V
Text in Illustration

*a

Front view of wire harness connector

(to ECM)
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

INSPECT STOP LIGHT SWITCH ASSEMBLY

(a) Inspect the stop light switch assembly (See page INSPECT STOP LIGHT SWITCH ASSEMBLY ).

(b) Clear the DTCs (See page (c) Check for DTCs (See page ). ).

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

OK:

DTC P057162 is not output

OK

REPLACE STOP LIGHT SWITCH ASSEMBLY

NG

REPLACE ECM

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