Radio Broadcast Cannot be Received or Poor Reception

AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Radio Broadcast cannot be Received or Poor Reception
- Radio Broadcast cannot be Received or Poor Reception

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
After replacing the radio receiver assembly of vehicles subscribed to pay-type satellite radio broadcasts, XM radio ID registration is necessary (w/ SDARS System).

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 -- REPLACE RADIO RECEIVER ASSEMBLY Removal
A -- Continue to next step.

2. CHECK OPTIONAL COMPONENTS

(a) 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:





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

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 ignition switch to 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 speaker.

OK:

Noise occurs.

NG -- REPLACE RADIO RECEIVER ASSEMBLY Removal
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - SATELLITE RADIO ANTENNA ASSEMBLY)

(a) Disconnect the radio receiver assembly connector.

(b) Disconnect the satellite radio antenna assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. INSPECT RADIO RECEIVER ASSEMBLY

(a) Reconnect 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 SUB-ASSEMBLY

(a) Remove the antenna plug of the radio receiver assembly and antenna.

(b) Measure the resistance between the satellite radio antenna assembly and radio receiver assembly to check for an open circuit in the antenna cord sub-assembly.

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 sub-assembly.

Standard Resistance:

10 kOhms or higher

NG -- REPLACE ANTENNA CORD SUB-ASSEMBLY Removal
OK -- Continue to next step.

7. REPLACE SATELLITE RADIO ANTENNA ASSEMBLY

(a) Replace the satellite radio 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