DESCRIPTION
The radio receiver assembly and telephone microphone assembly are connected to each other using the microphone connection detection signal lines.
This DTC is stored when a microphone connection detection signal line is disconnected.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
---|---|---|---|
B1579 | Voice Recognition Microphone Disconnected | Microphone signal is lost. |
|
WIRING DIAGRAM
w/ Manual (SOS) SwitchCAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
PROCEDURE
1. | INSPECT RADIO RECEIVER ASSEMBLY |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
NG | ![]() | REPLACE RADIO RECEIVER ASSEMBLY |
|
2. | CHECK MODEL |
(a) Choose the model to be inspected.
Result | Proceed to |
---|---|
w/ Manual (SOS) Switch | A |
w/o Manual (SOS) Switch | B |
B | ![]() | GO TO STEP 8 |
|
3. | CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - TELEPHONE MICROPHONE ASSEMBLY) |
(a) Disconnect the J157 DCM (telematics transceiver) connector.
(b) Disconnect the U15 telephone microphone assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J157-7 (MCI-) - U15-4 (MCO-) | Always | Below 1 Ω |
J157-7 (MCI-) or U15-4 (MCO-) - Body ground | Always | 10 kΩ or higher |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. | CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) |
(a) Disconnect the J151 radio receiver assembly connector.
(b) Disconnect the J157 DCM (telematics transceiver) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J151-22 (MIN-) - J157-32 (MCO-) | Always | Below 1 Ω |
J151-22 (MIN-) or J157-32 (MCO-) - Body ground | Always | 10 kΩ or higher |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. | CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY) |
(a) Disconnect the J151 radio receiver assembly connector.
(b) Disconnect the U15 telephone microphone assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J151-25 (SNS2) - U15-3 (SNS2) | Always | Below 1 Ω |
J151-25 (SNS2) or U15-3 (SNS2) - Body ground | Always | 10 kΩ or higher |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
6. | INSPECT DCM (TELEMATICS TRANSCEIVER) |
(a) Reconnect the J157 DCM (telematics transceiver) connector.
(b) Reconnect the J151 radio receiver assembly connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(d) Proceed to the next step based on the inspection result.
NG | ![]() | REPLACE DCM (TELEMATICS TRANSCEIVER) |
|
7. | INSPECT TELEPHONE MICROPHONE ASSEMBLY |
(a) Remove the telephone microphone assembly.
Click here
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK | ![]() | REPLACE RADIO RECEIVER ASSEMBLY |
NG | ![]() | REPLACE TELEPHONE MICROPHONE ASSEMBLY |
8. | CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY) |
(a) Disconnect the J151 radio receiver assembly connector.
(b) Disconnect the U15 telephone microphone assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J151-25 (SNS2) - U15-3 (SNS2) | Always | Below 1 Ω |
J151-22 (MIN-) - U15-4 (MCO-) | Always | Below 1 Ω |
J151-25 (SNS2) or U15-3 (SNS2) - Body ground | Always | 10 kΩ or higher |
J151-22 (MIN-) or U15-4 (MCO-) - Body ground | Always | 10 kΩ or higher |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
9. | INSPECT TELEPHONE MICROPHONE ASSEMBLY |
(a) Remove the telephone microphone assembly.
Click here
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK | ![]() | REPLACE RADIO RECEIVER ASSEMBLY |
NG | ![]() | REPLACE TELEPHONE MICROPHONE ASSEMBLY |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Climate Control Seat System: System Description
SYSTEM DESCRIPTION GENERAL (a) The seat blower has 3 levels of volume, controlled by operating the refreshing seat switch. (b) Whether the blower is on or off can be determined by checking if the refreshing seat switch indicator light is on or off. (c) The blowers of both seats are controlled by the ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Steering Column Assembly: Removal
REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed, installed, or replaced during the electric power steering column sub-assembly removal/installation are shown below. Necessary Procedure ...