Toyota Tacoma 2015-2018 Service Manual: Parking Brake Switch Circuit

Toyota Tacoma 2015-2018 Service Manual / Navigation / Multi Info Display / Navigation System / Parking Brake Switch Circuit

DESCRIPTION

This circuit is from the parking brake switch assembly to the navigation receiver assembly.

WIRING DIAGRAM

PROCEDURE

1.	CHECK VEHICLE SIGNAL (OPERATION CHECK)

(a) Display the "Vehicle Signal Check Mode" screen (See page ).

(b) Check that the display changes between ON and OFF according to the parking brake operation.

OK:

Parking Brake Condition	Display
Applied	ON
Released	OFF

HINT:

This display is updated once per second. As a result, it is normal for the display to lag behind the actual parking brake operation.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.	CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - PARKING BRAKE SWITCH ASSEMBLY)

(a) Disconnect the N25 navigation receiver assembly connector.

(b) Disconnect the P6 parking brake switch assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
N25-15 (PKB) - P6-1	Always	Below 1 Ω
N25-15 (PKB) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	INSPECT PARKING BRAKE SWITCH ASSEMBLY

(a) Remove the parking brake switch assembly.

(b) Inspect the parking brake switch assembly.

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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPLACE PARKING BRAKE SWITCH ASSEMBLY

Illumination Circuit

DESCRIPTION Power is supplied to the navigation receiver assembly and steering pad switch assembly illumination when the light control switch is in the TAIL or HEAD position. WIRING DIAGRAM CAU ...

Speaker Circuit

DESCRIPTION If there is a short in a speaker circuit, the stereo component amplifier assembly*1 or navigation receiver assembly*2 detects it and stops output to the speakers. Thus sound cannot be ...

Other materials:

Vehicle Information Not Obtained (C1A02)
DESCRIPTION When a new millimeter wave radar sensor assembly is installed, it receives vehicle specification information (destination, steering wheel position, 2WD or 4WD, etc.) from the main body ECU (multiplex network body ECU) and stores the information. DTC C1A02 is stored when the millime ...

Theft Deterrent System is not Unset when Engine is Running
DESCRIPTION The theft deterrent system is unset when the IG signal and engine speed signal are input to the main body ECU (multiplex network body ECU) for 2 seconds or more continuously. The engine speed signal is sent from the ECM to the main body ECU (multiplex network body ECU). For this ...

Dtc Check / Clear
DTC CHECK / CLEAR NOTICE: When the diagnosis system is changed from normal mode to check mode or vice versa, all DTCs and freeze frame data recorded in normal mode are cleared. Before changing modes, always check and make a note of DTCs and freeze frame data. HINT: DTCs which are sto ...