Toyota Tundra. Manual — part 154

NG: REPLACE FRONT NO. 2 SPEAKER RH (see REMOVAL )

Fig. 51: Identifying Front No. 2 Speaker RH Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

OK: Go to Next Step

12. INSPECT REAR NO. 1 SPEAKER LH

a. Disconnect the O7 speaker connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

NG: REPLACE REAR NO. 1 SPEAKER LH (see REMOVAL )

Fig. 52: Identifying Rear No. 1 Speaker LH Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

OK: REPLACE REAR NO. 1 SPEAKER RH (see REMOVAL )

NOISE OCCURS

INSPECTION PROCEDURE

Tester Connection Condition Specified Condition

1 - 2

Always

1.5 to 2.1 ohms

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra

1. NOISE CONDITION

a. Check which direction the noise comes from (front left or right, or rear left or right).

OK: The location of the noise source can be determined.

NG: Go to step 3

OK: Go to Next Step

2. CHECK SPEAKERS

a. Check the installation conditions of the speaker units that are located near the noise source and that

there are no cracks, scratches, deformation, or other problems.

Result:

RESULT REFERENCE

A: REINSTALL SPEAKER

B: REMOVE FOREIGN OBJECT

C: REPLACE SPEAKER

D: Go to Next Step

3. CHECK NOISE CONDITIONS

a. Check the noise condition.

HINT:

The radio has a noise prevention function to reduce noise when listening to the radio. If a loud
noise occurs, check whether the ground at the antenna mounting base and the noise prevention unit
are installed and wired correctly.

NOISE OCCURS CONDITION AND NOISE SOURCE

Condition

Proceed to

A speaker is installed incorrectly

A

Foreign objects are in the speaker

B

A speaker cone paper is broken

C

No malfunction is found

D

Conditions under which noise occurs

Noise source

Noise increases when the accelerator pedal is depressed, but stops when
the engine is stopped.

Generator

Noise occurs during A/C or heater operation.

Blower motor

Noise occurs when the vehicle accelerates rapidly on an unpaved road or

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra

HINT:



In the chart's left column, find the situation that matches the customer's complaint. Then, in
the right column, find the part that is causing the noise. Check the noise filter on the part.



To save time and avoid a misdiagnosis, first make sure that the noise is not coming from
outside the vehicle.



Noise should be removed in descending order of loudness.



Setting the radio to a frequency where no signal is received may make recognition of the
noise problem easier.

OK: The noise source cannot be determined.

NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE (see PROBLEM SYMPTOMS TABLE )

OK: REPAIR OR REPLACE NOISE SOURCE

PRESSING POWER SWITCH DOES NOT TURN ON SYSTEM

INSPECTION PROCEDURE

1. CHECK VEHICLE CONDITION

a. Check that conditions in the cabin are not likely to cause condensation.

HINT:

This problem occurs when the cabin is humid and the temperature changes rapidly. This may
produce condensation, resulting in a short circuit.

OK: Condensation is not likely to be produced.

NG: DRY OUT CABIN AND RECHECK CONDITION

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS

after the ignition switch is turned ON.

Fuel pump

Noise occurs when the horn switch is pressed and released or when
pressed and held.

Horn

Noise occurs synchronously with the blink of the turn signal.

Flasher

Noise occurs during window washer operation.

Washer

Noise occurs while the engine is running, and continues even after the
engine is stopped.

Engine coolant

temperature sensor

Noise occurs during wiper operation.

Wiper

Noise occurs when the brake pedal is depressed.

Stop light switch

Other

Static electricity

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra

TABLE (see PROBLEM SYMPTOMS TABLE )

NO SOUND CAN BE HEARD FROM SPEAKERS

INSPECTION PROCEDURE

1. CHECK RADIO RECEIVER

a. Check the radio receiver settings.

1. Check that the volume is not set to "0".

2. Check that "MUTE" is off.

OK: The volume is not set to "0" and "MUTE" is off.

NG: SYSTEM NORMAL (SET VOLUME TO HIGH OR SET MUTE OFF)

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE (see PROBLEM SYMPTOMS TABLE )

SOUND QUALITY IS BAD ONLY WHEN CD IS PLAYED (VOLUME IS TOO LOW)

INSPECTION PROCEDURE

1. REPLACE CD WITH ANOTHER AND RECHECK

a. Replace the CD with another one and recheck.

1. Check if the problem recurs using another CD.

OK: Malfunction disappears.

Result:

RESULT REFERENCE

B: REPLACE RADIO RECEIVER (see REMOVAL )

C: REPLACE RADIO RECEIVER (see REMOVAL )

A: END

CD CANNOT BE EJECTED

INSPECTION PROCEDURE

Result

Proceed to

OK

A

NG (for Column Shift Type)

B

NG (for Floor Shift Type)

C

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra