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

Toyota Tacoma (2015-2018) Service Manual / Cruise Control / Cruise Control System(for 2gr-fks) / 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

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
S10-4 - Body ground	Ignition switch off	Below 1 V

Text in Illustration

*a	Front view of wire harness connector (to Stop Light Switch Assembly)

REPAIR OR REPLACE HARNESS OR CONNECTOR

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
E13-15 (ST1-) - Body ground	Ignition switch on, brake pedal depressed	Below 1.5 V
E14-10 (STP) - Body ground	Brake pedal released	Below 1.5 V
E14-10 (STP) - Body ground	Brake pedal depressed	7.5 to 14 V

Text in Illustration

*a	Front view of wire harness connector (to ECM)

REPAIR OR REPLACE HARNESS OR CONNECTOR

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 ). ).

OK:

DTC P057162 is not output

REPLACE STOP LIGHT SWITCH ASSEMBLY

REPLACE ECM

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 ...

Cruise Control Input Processor (P160700)

DESCRIPTION When the ECM determines that there is a malfunction, the ECM illuminates the MIL and stores a DTC. HINT: When these DTCs are stored, the ECM cuts the current supplied to the throttle ...

Other materials:

Master Module Horizontal Axis Misalignment (C1AC1)
DESCRIPTION This DTC is stored when the angle of the blind spot monitor sensor LH deviates more than the allowable range from the horizontal axis. HINT: If drum tester such as a speedometer tester, brake/speedometer combination tester or chassis dynamometer is used with the blind spot monitor ...

Terminals Of Ecm
TERMINALS OF ECM 1. CHECK ECM HINT: The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard normal voltage for t ...

Operation Check
OPERATION CHECK 1. BLIND SPOT MONITOR BEAM AXIS INSPECTION (a) Procedure to enter Test Mode (1) Connect the Techstream to the DLC3. (2) Turn the ignition switch to ON. (3) Turn the blind spot monitor main switch assembly (warning canceling switch assembly) on. (4) Turn the Techstream on. (5 ...