Radio Broadcast Cannot be Received or Poor Reception

NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: Radio Broadcast cannot be Received or Poor Reception

Radio Broadcast cannot be Received or Poor Reception

INSPECTION PROCEDURE

PROCEDURE

1. CHECK NAVIGATION RECEIVER ASSEMBLY
(a) Check the radio automatic station search function.
(1) Check the radio automatic station search function by activating it.
OK:
The radio automatic station search function works properly.
NG -- CHECK OPTIONAL COMPONENTS
OK -- REPLACE NAVIGATION RECEIVER ASSEMBLY
2. CHECK OPTIONAL COMPONENTS
(a) Check optional components (window tint film, telephone antenna, etc.).
(1) Check if any optional components that may decrease reception capacity, such as window tint film or a telephone antenna, are installed.
OK:
Optional components are installed.
NOTE: Do not remove any optional components installed by the customer without his or her consent.

NG -- CHECK NAVIGATION RECEIVER ASSEMBLY
OK -- REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)
3. CHECK NAVIGATION RECEIVER ASSEMBLY




(a) Preparation for check
(1) Remove the antenna plug from the navigation receiver assembly.
(b) 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 speakers.
OK:
Noise occurs.
NG -- REPLACE NAVIGATION RECEIVER ASSEMBLY
OK -- Continue to next step.

4. CHECK ROOF ANTENNA
(a) Check that the roof antenna is securely installed.
OK:
The roof antenna is installed properly.
NG -- REINSTALL OR REPLACE ROOF ANTENNA
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - ANTENNA AMPLIFIER)




(a) Disconnect the navigation receiver assembly connector.
(b) Disconnect the antenna amplifier 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.

6. INSPECT NAVIGATION RECEIVER ASSEMBLY




(a) Reconnect the navigation receiver assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:






NG -- REPLACE NAVIGATION RECEIVER ASSEMBLY
OK -- Continue to next step.

7. CHECK ANTENNA CORD
(a) Remove the antenna plug of the navigation receiver assembly and antenna.
(b) Measure the resistance between the antenna and navigation 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
NG -- REPLACE ANTENNA CORD
OK -- Continue to next step.

8. REPLACE ANTENNA AMPLIFIER
(a) Replace the antenna amplifier and check if radio broadcasts can be received normally Removal.
OK:
Radio broadcasts can be received.
NG -- REPLACE NAVIGATION RECEIVER ASSEMBLY
OK -- NORMAL OPERATION