Toyota Tacoma 2015-2018 Service Manual: Radio Broadcast cannot be Received or Poor Reception

Toyota Tacoma 2015-2018 Service Manual / Navigation / Multi Info Display / Navigation System / Radio Broadcast cannot be Received or Poor Reception

PROCEDURE

1.	CHECK NAVIGATION RECEIVER ASSEMBLY

(a) Check the radio automatic station search function.

(1) Check the radio automatic station search function by activating it.

Result

Result	Proceed to
Automatic station search function does not stop	A
Automatic station search function stops on a station	B

REPLACE NAVIGATION RECEIVER ASSEMBLY

2.	CHECK OPTIONAL COMPONENTS

(a) Check if any optional components that may decrease reception capacity, such as sunshade film or a telephone antenna, are installed.

Result

Result	Proceed to
Optional components are not installed	A
Optional components are installed	B

NOTICE:

Do not remove optional components without the permission of the customer.

REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)

3.	CHECK NAVIGATION RECEIVER ASSEMBLY

(a) Preparation for check

(1) Remove the antenna connector from the navigation receiver assembly.

(b) Check for noise

(1) Turn the ignition switch to ACC with the navigation receiver assembly connector connected.

(2) Turn the radio on and tune into AM mode.

(3) Place a screwdriver, thin wire or other metal object on the navigation receiver assembly antenna jack and check that noise can be heard from the speakers.

OK:

Noise can be heard from the speakers.

REPLACE NAVIGATION RECEIVER ASSEMBLY

4.	INSPECT NAVIGATION RECEIVER ASSEMBLY

(a) Disconnect the navigation receiver assembly connector.

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
RA-5 (ANT+) - Body ground	Ignition switch ACC. Radio switch on and FM or AM selected	11 to 14 V

Tester Connection

Switch Condition

Specified Condition

RA-5 (ANT+) - Body ground

Ignition switch ACC.

Radio switch on and FM or AM selected

11 to 14 V

Text in Illustration

*a	Component without harness connected (Navigation Receiver Assembly)

REPLACE NAVIGATION RECEIVER ASSEMBLY

5.	REPLACE ANTENNA CORD SUB-ASSEMBLY

(a) Replace the antenna cord sub-assembly and check if radio broadcasts can be received normally (See page OK: ).

OK:

Radio broadcasts can be received normally.

END

6.	REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY

(a) Replace the antenna assembly with assembly and check if radio broadcasts can be received normally (See page OK: ).

OK:

Radio broadcasts can be received normally.

END

7.	REPLACE ANTENNA ASSEMBLY WITH HOLDER

(a) Replace the roof antenna assembly and check if radio broadcasts can be received normally (See page OK: ).

OK:

Radio broadcasts can be received normally.

END

REPLACE NAVIGATION RECEIVER ASSEMBLY

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