Radio Broadcast cannot be Received or Poor Reception: Procedure

1. 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 stops on a station	A
      Automatic station search function does not stop	B

B → See step   2 

A → See step   8 

1. Check optional components (sunshade film, telephone antenna, etc.).
   1. 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 installed	A
      Optional components are not installed	B

      NOTE:

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

B → See step   3 

A → REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE) 

1. Preparation for check
   Fig 1: Identifying Antenna Connector & Radio Receiver Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Remove the antenna plug from the radio receiver assembly.
2. Check for noise
   1. Turn the engine switch on (ACC) with the radio 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 radio receiver assembly antenna jack and check that noise can be heard from the speakers.

      OK

      Noise can be heard from the speaker.

NG → See step   8 

OK: Go to next step 

1. Check for continuity of the antenna.
   Fig 2: Checking For Continuity Of Each Antenna Wire

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT: 

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

   NOTE:

   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 resistance, wrap a piece of tin foil around the tip of each probe and press the foil against the wire with your finger, as shown in the illustration.

   OK

   There is continuity in the antenna.

   TEXT IN ILLUSTRATION
   
   

   *a	Tester Probe
   *b	Antenna Wire
   *c	Tin Foil

NG → See step   9 

OK: Go to next step 

1. Disconnect the radio receiver assembly connector.
   Fig 3: Inspecting Radio Receiver Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   RA1-5 (ANT+) - Body ground	Engine switch on (ACC) Radio switch on	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Radio Receiver Assembly)

NG → See step   8 

OK: Go to next step 

1. Remove the antenna plug of the radio receiver assembly and antenna.
2. Measure the resistance between the antenna and radio receiver assembly 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

NG → See step   10 

OK: Go to next step 

1. Replace the amplifier antenna assembly and check if radio broadcasts can be received normally. Refer to REMOVAL .

   OK

   Radio broadcasts can be received.

NG → See step   8 

OK → NORMAL OPERATION