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. |
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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PROCEDURE
1. | INSPECT RADIO RECEIVER ASSEMBLY |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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NG | ![]() | REPLACE RADIO RECEIVER ASSEMBLY |
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2. | 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 |
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3. | 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 |
|
4. | 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 |
|
5. | 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:
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|
(d) Proceed to the next step based on the inspection result.
NG | ![]() | REPLACE DCM (TELEMATICS TRANSCEIVER) |
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6. | 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:
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OK | ![]() | REPLACE RADIO RECEIVER ASSEMBLY |
NG | ![]() | REPLACE TELEPHONE MICROPHONE ASSEMBLY |
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