Toyota CH-R Service Manual: Radio Receiver Power Source Circuit

DESCRIPTION

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

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY POWER SOURCE)

(a) Disconnect the radio receiver assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F48-7 (GND1) - Body ground

Always

Below 1 Ω

*a

Front view of wire harness connector

(to Radio Receiver Assembly)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

F48-4 (+B1) - F48-7 (GND1)

Always

11 to 14 V

F48-3 (ACC1) - F48-7 (GND1)

Ignition switch ACC

11 to 14 V

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

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