Inspection Procedure

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. 

      NG: Go to step 2 

      OK: REPLACE RADIO RECEIVER  (See REMOVAL )

1. Check optional components (sun-shade 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.

      OK: Optional components are installed. 

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

      NG: Go to step 3 

      OK: REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE) 

1. Preparation for check
   1. Remove the antenna plug from the radio receiver.
2. Check for noise
   1. Turn the ignition switch to ACC with the radio receiver 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's antenna jack and check that noise can be heard from the speaker.

      OK: Noise can be heard from the speaker. 

      Fig 1: Locating Radio Receiver Antenna Plug

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPLACE RADIO RECEIVER  (See REMOVAL )

      OK: Go to Next Step 

1. Disconnect the radio receiver connector and the antenna amplifier connector.
2. Measure the resistance according to the value(s) in the table below.

Standard Resistance 

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 2: Identifying Radio Receiver And Antenna Amplifier Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

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

Standard Voltage 

NG: REPLACE RADIO RECEIVER  (See REMOVAL )

Fig 3: Identifying Radio Receiver Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

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 

   NG: REPLACE ANTENNA CORD  (See REMOVAL )

   OK: Go to Next Step 

1. Check for continuity of the antenna.

   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 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. 

   NG: REPAIR GLASS ANTENNA  (See WINDOW GLASS ANTENNA WIRE )

   Fig 4: Checking Continuity At Center Of Antenna Wire

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to Next Step 

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

   OK: Radio broadcasts can be received. 

   NG: REPLACE RADIO RECEIVER  (See REMOVAL )

   OK: NORMAL OPERATION