Radio Broadcast Cannot Be Received or Poor Reception
AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Radio Broadcast cannot be Received or Poor Reception
- Radio Broadcast cannot be Received or Poor Reception
INSPECTION PROCEDURE
PROCEDURE
1. CHECK RADIO RECEIVER ASSEMBLY
(a) Check the radio automatic station search function.
(1) Check the radio automatic station search function by activating it.
Result:
B -- CHECK OPTIONAL COMPONENTS
A -- REPLACE RADIO RECEIVER ASSEMBLY Removal
2. CHECK OPTIONAL COMPONENTS
(a) 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:
NOTICE:
Do not remove any optional components installed by the customer without his or her consent.
B -- CHECK RADIO RECEIVER ASSEMBLY
A -- REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)
3. CHECK RADIO RECEIVER ASSEMBLY
(a) Preparation for check
(1) Remove the antenna plug from the radio receiver assembly.
(b) 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 -- REPLACE RADIO RECEIVER ASSEMBLY Removal
OK -- Continue to next step.
4. CHECK GLASS ANTENNA
(a) Check for continuity of the antenna.
HINT
Check for continuity at the center of each antenna wire as shown in the illustration.
NOTICE:
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.
NG -- REPAIR GLASS ANTENNA
OK -- Continue to next step.
5. INSPECT RADIO RECEIVER ASSEMBLY
(a) Disconnect the radio receiver assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Text in Illustration
NG -- REPLACE RADIO RECEIVER ASSEMBLY Removal
OK -- Continue to next step.
6. CHECK ANTENNA CORD
(a) Remove the antenna plug of the radio receiver assembly and antenna.
(b) Measure the resistance between the antenna and radio receiver assembly to check for an open circuit in the antenna cord.
Standard Resistance:
Below 1 Ohms
(c) Measure the resistance between the antenna cord and body ground to check for a short circuit in the antenna cord.
Standard Resistance:
10 kOhms or higher
(d) Proceed to the next step based on the inspection result.
Result:
C -- REPLACE ANTENNA CORD Removal
B -- REPLACE ANTENNA CORD Removal
A -- Continue to next step.
7. REPLACE AMPLIFIER ANTENNA ASSEMBLY
(a) Replace the amplifier antenna assembly and check if radio broadcasts can be received normally Removal.
OK:
Radio broadcasts can be received.
NG -- REPLACE RADIO RECEIVER ASSEMBLY Removal
OK -- NORMAL OPERATION