Toyota 4Runner manuals

Toyota 4Runner: Radio Receiver Power Source Circuit

DESCRIPTION

This is the power source circuit to operate the radio and display receiver assembly.

WIRING DIAGRAM


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 (RADIO AND DISPLAY RECEIVER ASSEMBLY - BATTERY, BODY GROUND)


(a) Disconnect the G49 and G48 radio and display receiver assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G48-7 (GND) - Body ground

Always

Below 1 Ω

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G48-3 (ACC) - G48-7 (GND)

Ignition switch ACC

11 to 14 V

G48-4 (B) - G48-7 (GND)

Always

11 to 14 V

G49-1 (IG) - G48-7 (GND)

Ignition switch ON

11 to 14 V

Text in Illustration

*a

Front view of wire harness connector

(to Radio and Display Receiver Assembly)


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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