Toyota 4Runner: Radio Receiver Power Source Circuit

Toyota 4Runner Service Manual / Audio / Visual / Telematics / Audio / Video / Audio And Visual System / 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

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)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

Microphone Circuit between Microphone and Radio Receiver

DESCRIPTION The radio and display receiver assembly and map light assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal ...

Back Door Speaker

Components COMPONENTS ILLUSTRATION Removal REMOVAL CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH and LH sides. The procedure listed below is for the LH side. ...

Other materials about Toyota 4Runner:

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of ...

Inspection
INSPECTION PROCEDURE 1. INSPECT BACK DOOR POWER WINDOW REGULATOR MOTOR ASSEMBLY (a) Check that the motor gear rotates smoothly as follows. NOTICE: Do not apply positive (+) battery voltage to any terminals except terminal 2 (B) to avoid ...