Lexus ES: Radio Broadcast cannot be Received or Poor Reception
CAUTION / NOTICE / HINT
NOTICE:
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Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System.
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When replacing the radio receiver assembly, always replace it with a new one. If a radio receiver assembly which was installed to another vehicle is used, the following may occur:
- A communication malfunction DTC may be stored.
- The radio receiver assembly may not operate normally.
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 | Proceed to |
|---|---|
| Automatic station search function does not stop. | A |
| Automatic station search function stops on a station. | B |
| B |  | REPLACE RADIO RECEIVER ASSEMBLY |
|
| 2. | CHECK OPTIONAL COMPONENTS |
(a) Check if any optional components that may decrease reception capacity, such as a sunshade film or a telephone antenna, are installed.
| Result | Proceed to |
|---|---|
| Optional components are not installed. | A |
| Optional components are installed. | B |
NOTICE:
Do not remove optional components without the permission of the customer.
| B | | REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE) |
|
| 3. | CHECK RADIO RECEIVER ASSEMBLY |
| (a) Preparation for check (1) Disconnect the antenna connector from the radio receiver assembly. |
|
(b) Check for noise
(1) Turn the power switch on (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 speakers.
OK:
Noise can be heard from the speakers.
| NG | | REPLACE RADIO RECEIVER ASSEMBLY |
|
| 4. | CHECK WINDOW GLASS ANTENNA WIRE |
| (a) Check for continuity in the window glass antenna wire. NOTICE: When cleaning the glass, wipe it in the direction of the wire with a soft dry cloth. Take care not to damage the wire. Do not use detergents or glass cleaners with abrasive ingredients. When measuring resistance, wrap a piece of tin foil around the tip of each probe and press the foil against the wire with your finger, as shown in the illustration. HINT: Check for continuity at the center of each antenna wire as shown in the illustration. OK: There is continuity in the window glass antenna wire. |
|
| NG | | REPAIR WINDOW GLASS ANTENNA WIRE |
|
| 5. | INSPECT RADIO RECEIVER ASSEMBLY |
(a) Disconnect the RA radio receiver assembly connector.
| (b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| NG | | REPLACE RADIO RECEIVER ASSEMBLY |
|
| 6. | REPLACE ANTENNA CORD SUB-ASSEMBLY |
(a) Replace the antenna cord sub-assembly with a new or known good one and check if radio broadcasts can be received normally.
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OK:
Radio broadcasts can be received normally.
| OK | | END |
|
| 7. | REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY |
(a) Replace the No. 2 antenna cord sub-assembly with a new or known good one and check if radio broadcasts can be received normally.
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OK:
Radio broadcasts can be received normally.
| OK | | END |
|
| 8. | REPLACE NO. 1 AMPLIFIER ANTENNA ASSEMBLY |
(a) Replace the No. 1 amplifier antenna assembly with a new or known good one and check if radio broadcasts can be received normally.
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OK:
Radio broadcasts can be received normally.
| OK | | END |
|
| 9. | REPLACE NO. 4 ANTENNA CORD SUB-ASSEMBLY |
(a) Replace the No. 4 antenna cord sub-assembly with a new or known good one and check if radio broadcasts can be received normally.
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OK:
Radio broadcasts can be received normally.
| OK | | END |
| NG | | REPLACE RADIO RECEIVER ASSEMBLY |
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