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

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.

Result:

B -- REPLACE NAVIGATION 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 ANTENNA

A -- REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)

3. CHECK RADIO ANTENNA

(a) Preparation for check

(1) Remove the roof antenna pole sub-assembly from the amplifier antenna assembly.

(b) Check for noise

(1) Turn the power switch on (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 amplifier antenna threaded installation portion for the roof antenna pole sub-assembly and check that noise can be heard from the speakers.

Result:

B -- REPLACE NAVIGATION RECEIVER ASSEMBLY Removal
A -- Continue to next step.

4. 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 power switch on (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 speaker.

OK:

Noise occurs.

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

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

(a) Disconnect the L40 navigation receiver assembly connector (w/ "Bluetooth" Audio System).

(b) Disconnect the L34 navigation receiver assembly connector (w/o "Bluetooth" Audio System).

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

Standard Resistance:

Text in Illustration

*4: w/ "Bluetooth" Audio System

*5: w/o "Bluetooth" Audio System

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

6. INSPECT NAVIGATION RECEIVER ASSEMBLY

(a) Reconnect the L40*2 or L34*3 navigation receiver assembly connector.

(b) Disconnect the L36 antenna amplifier assembly connector.

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

Standard Voltage:

Text in Illustration

*2: w/ "Bluetooth" Audio System

*3: w/o "Bluetooth" Audio System

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

8. 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 NAVIGATION RECEIVER ASSEMBLY Removal

OK -- NORMAL OPERATION