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Toyota Tacoma (2015-2018) Service Manual / Navigation / Multi Info Display / Navigation System / Radio Receiver Power Source Circuit

Toyota Tacoma (2015-2018) Service Manual: Radio Receiver Power Source Circuit

DESCRIPTION

This is the power source circuit to operate the navigation receiver assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - BATTERY AND BODY GROUND)

(a) Disconnect the N24 and N25 navigation receiver assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

N24-7 (GND1) - Body ground

Always

Below 1 Ω

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

N24-4 (+B1) - N24-7 (GND1)

Always

11 to 14 V

N24-3 (ACC1) - N24-7 (GND1)

Ignition switch ACC

11 to 14 V

N25-1 (IG) - N24-7 (GND1)

Ignition switch ON

11 to 14 V
Text in Illustration

*a

Front view of wire harness connector

(to Navigation Receiver Assembly)
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
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