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

B → See step   9 

A: Go to next step 

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.

      Result

      Result	Proceed to
      Optional components are installed	A
      Optional components are not installed	B

      NOTE:

      Do not remove optional components without the permission of the customer.

B → See step   3 

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

1. Preparation for check
   Fig 1: Locating Radio Receiver Antenna Plug

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Remove the antenna plug from the navigation receiver assembly.
2. Check for noise
   1. Turn the ignition switch to ACC with the navigation 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 navigation receiver assembly antenna jack and check that noise can be heard from the speaker.

      OK

      Noise occurs.

NG → See step   9 

OK: Go to next step 

1. Check for continuity in the antenna.
   Fig 2: Checking Continuity Between 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 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 → See step   10 

OK: Go to next step 

1. Disconnect the E2 navigation receiver assembly connector.
2. Disconnect the E7 amplifier antenna assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E2-13 (ANT) - E7-1 (B)	Always	Below 1 Ω
   E2-13 (ANT) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the E2 navigation receiver assembly connector.
   Fig 3: Identifying E7 Navigation Receiver Assembly Connector

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   E7-1 (B) - Body ground	Ignition switch ON Radio switch on	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Amplifier Antenna Assembly)

NG → See step   9 

OK: Go to next step 

1. Remove the antenna plug of the navigation receiver assembly and antenna.
2. Measure the resistance between the antenna and navigation 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   11 

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   9 

OK → NORMAL OPERATION