Toyota Tundra Service Manual: Radio Broadcast cannot be Received or Poor Reception

PROCEDURE

1.

CHECK IF RADIO AUTO-SEARCH FUNCTIONS PROPERLY

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

OK:

Automatic station search function stops on a station.

OK

USE SIMULATION METHOD TO CHECK

NG

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.

OK:

Optional components are installed.

NOTICE:

Do not remove optional components without permission of the customer.

OK

REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)

NG

3.

CHECK RADIO ANTENNA

(a) Remove the pull top antenna pole sub-assembly from the fender antenna assembly.

(b) Place the tip of a screwdriver on the antenna and check that noise is heard from the speakers.

OK:

Noise occurs.

Result

Result

Proceed to

OK (for Column Shift Type)

A

OK (for Floor Shift Type)

B

NG

C

A

REPLACE NAVIGATION RECEIVER ASSEMBLY

B

REPLACE NAVIGATION RECEIVER ASSEMBLY

C

4.

CHECK NAVIGATION RECEIVER ASSEMBLY (ANTENNA)

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

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

(c) Turn on the radio and turn into AM mode.

(d) 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 occurs.

Result

Result

Proceed to

OK

A

NG (for Column Shift Type)

B

NG (for Floor Shift Type)

C

B

REPLACE NAVIGATION RECEIVER ASSEMBLY

C

REPLACE NAVIGATION RECEIVER ASSEMBLY

A

5.

INSPECT NAVIGATION RECEIVER ASSEMBLY

(a) Disconnect the J151 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

5 (ANT+) - Body ground

Ignition switch ACC, radio switch on and FM or AM selected

11 to 14 V

Result

Result

Proceed to

OK

A

NG (for Column Shift Type)

B

NG (for Floor Shift Type)

C

B

REPLACE NAVIGATION RECEIVER ASSEMBLY

C

REPLACE NAVIGATION RECEIVER ASSEMBLY

A

6.

CHECK PULL TOP ANTENNA POLE SUB-ASSEMBLY

(a) Check that the pull top antenna pole sub-assembly is securely installed (See page ).

OK:

The pull top antenna pole sub-assembly is installed properly.

NG

REINSTALL PULL TOP ANTENNA POLE SUB-ASSEMBLY

OK

7.

CHECK FENDER ANTENNA ASSEMBLY

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

OK:

Radio broadcasts can be received normally.

Result

Result

Proceed to

OK

A

NG (for Column Shift Type)

B

NG (for Floor Shift Type)

C

A

END (FENDER ANTENNA ASSEMBLY IS DEFECTIVE)

B

REPLACE NAVIGATION RECEIVER ASSEMBLY

C

REPLACE NAVIGATION RECEIVER ASSEMBLY

    Problem Symptoms Table

    Registered Device cannot be Deleted

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