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

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