Toyota RAV4 manuals

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

Toyota Sienna Service Manual / Audio / visual / Audio and visual system / Diagnostic trouble code chart / Radio Broadcast cannot be Received or Poor Reception

INSPECTION PROCEDURE

1 CHECK RADIO RECEIVER

  1. Check the radio's automatic station search function.
  1.  Check the radio's automatic station search function by activating it.

OK: The radio's automatic station search function works properly.

2 CONFIRM MODEL

Result

Result

3 INSPECT RADIO RECEIVER ASSEMBLY

 INSPECT RADIO RECEIVER ASSEMBLY

  1. Disconnect the radio receiver connector R7.
  2.  Measure the voltage according to the value(s) in the table below.

Standard voltage

Standard voltage

4 CHECK OPTIONAL COMPONENTS

  1. Check optional components (sun-shade film, telephone antenna, etc.).
  1.  Check if any optional components, such as sunshade film or telephone antenna that may decrease reception capacity, are installed.

OK: Optional components are installed.

NOTICE: Do not remove any optional components installed by the customer without his or her consent.

5 CHECK RADIO RECEIVER

CHECK RADIO RECEIVER

  1. Preparation for check
  1.  Remove the antenna plug from the radio receiver.
  1.  Check for noise
  1.  Turn the ignition switch to the ACC position with the radio receiver connector connected.
  2.  Turn the radio on and put into AM mode.
  3.  Place a screwdriver, thin wire, or other metal object on the radio receiver's antenna jack and check that noise can be heard from the speaker.

OK: Noise occurs

6 CHECK GLASS ANTENNA

CHECK GLASS ANTENNA

  1. Check for continuity of the antenna.

HINT: Check for continuity at the center of each antenna wire as shown in the illustration.

NOTICE: When cleaning the glass, wipe it in the direction of the wire with a soft dry cloth. Take care not to damage the wire. Do not use detergents or glass cleaners with abrasive ingredients. When measuring voltage, wrap a piece of tin foil around the tip of the negative probe and press the foil against the wire with your finger, as shown in the illustration.

OK: There is continuity in the antenna.

7 CHECK ANTENNA CORD

  1. Remove the antenna plug of the radio receiver and antenna.
  2. Measure the resistance between the antenna and radio receiver to check for an open circuit in the antenna cord.

    Standard resistance: Below 1 Ω

  3. Measure the resistance between the antenna cord and body ground to check for a short circuit in the antenna cord.

    Standard resistance: 10 kΩ or higher

8 REPLACE AMPLIFIER ANTENNA ASSEMBLY

  1. Replace the amplifier antenna and check if radio broadcasts can be received normally.

OK: Radio broadcasts can be received.

REPLACE RADIO RECEIVER

9 CHECK OPTIONAL COMPONENTS

  1. Check optional components (sun-shade film, telephone antenna, etc.).
  1.  Check if any optional components, such as sunshade film or telephone antenna that may decrease reception capacity, are installed.

OK: Optional components are installed.

NOTICE: Do not remove any optional components installed by the customer without his or her consent.

10 CHECK RADIO RECEIVER

 CHECK RADIO RECEIVER

  1. Preparation for check
  1.  Remove the antenna plug from the radio receiver.
  1.  Check for noise
  1. Turn the ignition switch on (ACC) with the radio receiver connector connected.
  2. Turn the radio on and put into AM mode.
  3. Place a screwdriver, thin wire, or other metal object on the radio receiver's antenna jack and check that noise can be heard from the speaker.

OK: Noise occurs.

11 CHECK RADIO ANTENNA CO

  1. Remove the antenna plug of the radio receiver and antenna.
  2. Measure the resistance between the antenna and radio receiver to check for an open circuit in the radio antenna cord.

Standard resistance: Below 1 Ω

  1. Measure the resistance between the radio antenna cord and body ground to check for a short circuit in the antenna cord.

Standard resistance: 10 kΩ or higher

12 REPLACE ANTENNA POLE

  1. Replace antenna pole and check that it operated normally.

OK: The antenna pole operates normally.

REPLACE RADIO RECEIVER

CD Sound Skips
INSPECTION PROCEDURE 1 CHECK CD Check the CD. OK: The CD is clean. HINT: If dirt is on the CD surface, wipe it clean with a soft cloth from the inside to the outside in a radial direct ...

Poor Sound Quality in All Modes (Low Volume)
INSPECTION PROCEDURE 1 CHECK AUDIO SETTINGS Set "BASS", "MID", and "TREB" to the initial values and check that sound is normal. OK: Malfunction disappears. 2 ...

Other materials:

Reassembly
1. INSTALL BACK DOOR STOPPER LOWER Install the 2 stoppers with the 4 bolts. Torque: 7.0 N*m (71 kgf*cm, 62 in.*lbf) 2. INSTALL BACK DOOR BASE STOPPER BRACKET Install the 2 stopper brackets with the 4 bolts. Torque: 7.0 N*m (71 kgf*cm, 62 in.*lbf) 3. INSTALL BACK DOOR LOCK ASSEMBLY ...

VC Output Circuit
DESCRIPTION The ECM constantly uses 5 V from the battery voltages supplied to the +B (BATT) terminal to operate the microprocessor. The ECM also provides this power to the sensors through the VC output circuit. When the VC circuit is short-circuited, the microprocessor in the ECM and sens ...

Transmission Range Sensor Circuit Malfunction (PRNDL Input)
DESCRIPTION The park/neutral position switch detects the shift lever position and sends signals to the ECM. HINT: After confirming DTC P0705, use the intelligent tester to confirm the PNP switch signal in the ALL menu (to reach the ALL menu: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ...

В© 2011-2019 Copyright www.tsienna.net