Radio Broadcast Cannot be Received or Poor Reception
NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM (w/ USB Audio System): Radio Broadcast cannot be Received or Poor Reception
- Radio Broadcast cannot be Received or Poor Reception
WIRING DIAGRAM
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 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.
OK:
Optional components are installed.
NOTICE:
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) Remove the antenna plug from the navigation receiver assembly.
(b) Turn the ignition switch to ACC with the navigation receiver assembly connector connected.
(c) Turn the radio on and select AM mode.
(d) Place a screwdriver, thin wire or other metal object on the navigation receiver antenna jack and check that noise can be heard from the speakers.
OK:
Noise occurs.
NG -- REPLACE NAVIGATION RECEIVER ASSEMBLY Removal
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER - AMPLIFIER ANTENNA)
(a) Disconnect the I20 navigation receiver assembly connector.
(b) Disconnect the I23 amplifier 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. CHECK NAVIGATION RECEIVER ASSEMBLY
(a) Disconnect the I23 navigation receiver assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
NG -- REPLACE NAVIGATION RECEIVER ASSEMBLY Removal
OK -- Continue to next step.
6. CHECK ANTENNA CORD
(a) Remove the antenna plug of the navigation receiver and antenna.
(b) Measure the resistance between the antenna and navigation 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
OK -- Continue to next step.
7. REPLACE AMPLIFIER ANTENNA ASSEMBLY
(a) Replace the amplifier antenna assembly and check if radio broadcasts can be received normally.
OK:
Radio broadcasts can be received.
NG -- REPLACE NAVIGATION RECEIVER ASSEMBLY Removal
OK -- NORMAL OPERATION