Radio Broadcast cannot be Received (Bad Reception)

1. Check if the radio auto-search functions properly.
   1. Perform the auto-search of the radio and check that it functions normally.

      OK: The radio auto-search functions properly. 

OK: REPLACE RADIO RECEIVER ASSEMBLY 

NG: GO TO NEXT STEP 

1. Check optional component (sun shade film, telephone antenna, etc.).
   1. Check whether or not any optional component such as the sun shade film and the telephone antenna is installed.

      OK: Optional component is installed. 

OK: EFFECT FROM OPTIONAL COMPONENT 

NG: GO TO NEXT STEP 

1. Preparation for Check
   1. Remove the antenna plug of the radio receiver assembly.
2. Noise Check
   1. With the radio receiver assembly connector connected, turn the ignition switch to the ACC position.
   2. Turn on the radio and choose the AM mode.
   3. Place a screwdriver or a piece of metal such as thin wire on an antenna jack of the radio receiver assembly and check that the noise is heard from the speaker.

      OK: Noise occurs. 

Fig 1: Inspecting Radio Receiver Assembly (Antenna)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RADIO RECEIVER ASSEMBLY 

OK: GO TO NEXT STEP 

1. Choose type to be inspected.
   RESISTANCE SPECIFIED CONDITION RESISTANCE SPECIFIED CONDITION
   
   

   Type	Go to step
   Glass printed type antenna	A
   Roof type antenna	B

B: Go to step   8 

A: Go to next step 

1. Check for continuity of the antenna.

   HINT:

   Check the continuity at the center of each antenna wire as shown in Fig 2.

   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 voltage, wind a piece of tin foil around the top of the negative probe and press the foil against the wire with your finger, as shown in Fig 2.

   OK: There is continuity in the antenna. 

NG: REPAIR ANTENNA ASSEMBLY 

Fig 2: Checking Continuity At Center Of Each Antenna Wire

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP 

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

   Resistance: Below 1 Ω 

3. Measure the resistance between the antenna code subassembly and body ground to check for a short circuit in the antenna cord sub-assembly.

   Resistance: 10 kΩ or higher 

NG: REPLACE ANTENNA CORD SUBASSEMBLY 

OK: GO TO NEXT STEP 

1. Replace the amplifier antenna assembly and check if it operates normally.

   OK: The amplifier antenna assembly operates normally. 

OK: NORMAL OPERATION 

NG: REPLACE RADIO RECEIVER ASSEMBLY 

1. Check that the antenna is securely installed.

   OK: The antenna is installed properly. 

OK: Go to step   6 

NG: INSTALL ANTENNA ASSEMBLY PROPERLY