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
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. CHECK RADIO RECEIVER
(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 Removal
2. CHECK OPTIONAL COMPONENTS
(a) Check for 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
A -- REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)
3. CHECK RADIO RECEIVER
(a) Preparation for check
(1) Remove the antenna plug from the radio receiver.
(b) 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 antenna jack and check that noise can be heard from the speaker.
OK:
Noise can be heard from the speaker.
NG -- REPLACE RADIO RECEIVER Removal
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - AMPLIFIER ANTENNA)
(a) Disconnect the radio receiver and antenna amplifier connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
Text in Illustration:
*4: for 8 Speakers
*5: for 6 Speakers
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. INSPECT RADIO RECEIVER
(a) Reconnect the radio receiver connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Text in Illustration
Text in Illustration:
NG -- REPLACE RADIO RECEIVER Removal
OK -- Continue to next step.
6. CHECK ANTENNA CORD
(a) Remove the antenna plug of the radio receiver and antenna.
(b) Measure the resistance between the antenna and radio receiver 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
NG -- REPLACE ANTENNA CORD Removal
OK -- Continue to next step.
7. REPLACE AMPLIFIER ANTENNA
(a) Replace the amplifier antenna and check if radio broadcasts can be received normally.
OK:
Radio broadcasts can be received.
NG -- REPLACE RADIO RECEIVER Removal
OK -- NORMAL OPERATION