Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

CHECK RADIO AND NAVIGATION ASSEMBLY
1. Check the radio's automatic search function.
  1. Check the radio's automatic station search function by activating it.
    OK:
    
    The radio's automatic station search function works properly.
OK: REPLACE RADIO AND NAVIGATION ASSEMBLY

NG: GO TO NEXT STEP.

INSPECT RADIO AND NAVIGATION ASSEMBLY

Disconnect the radio and navigation assembly connector R12.

Measure the voltage according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION .

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
ANT - Body ground	Ignition SW ON Radio SW ON	10 to 14 V

Fig 1: Disconnecting Radio & Navigation Assembly Connector R12

NG: REPLACE RADIO AND NAVIGATION ASSEMBLY

OK: GO TO NEXT STEP.

CHECK OPTIONAL COMPONENTS
1. Check optional components (sun-shade film, telephone antenna, etc.).
  1. Check if any optional components, such as sun-shade film or telephone antenna that may decrease reception capacity, are installed.
    OK:
    
    Optional components are installed.
    
    NOTE: Do not remove any optional components installed by the customer without his or her consent.
OK: REMOVE AND RECHECK OPTIONAL COMPONENTS (SEE NOTICE ABOVE)

NG: GO TO NEXT STEP.
CHECK RADIO AND NAVIGATION ASSEMBLY
1. Preparation for check
  1. Remove the antenna plug from the radio and navigation assembly.
2. Check for noise
  1. Turn the ignition switch to the ACC position with the radio and navigation assembly 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 and navigation assembly's antenna jack and check that noise can be heard from the speaker.
    
    Fig 2: Identifying Antenna Plug
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    OK:
    
    Noise occurs.
NG: REPLACE RADIO AND NAVIGATION ASSEMBLY

OK: GO TO NEXT STEP.
CHECK GLASS ANTENNA
1. Check for continuity of the antenna.
HINT:

Check for continuity at the center of each antenna wire as shown in Fig 3.

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, 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.

Fig 3: Checking For Continuity At Center Of Antenna Wire
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR GLASS ANTENNA

OK: GO TO NEXT STEP.
REPLACE ANTENNA AMPLIFIER
1. Replace the antenna amplifier and check that it operates normally.
  OK:
  
  The antenna amplifier operates normally.
OK: END

NG: REPLACE RADIO AND NAVIGATION ASSEMBLY