DESCRIPTION
The radio and display receiver assembly and map light assembly (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 Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B1579 |
Telephone microphone signal is lost. |
|
WIRING DIAGRAM
PROCEDURE
1. |
INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
NG | ![]() |
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY |
|
2. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) |
(a) Disconnect the G49 radio and display receiver assembly connector.
(b) Disconnect the U2 map light assembly (telephone microphone assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
G49-6 (SNS2) - U2-15 (SNS2) |
Always |
Below 1 Ω |
G49-19 (MIN-) - U2-12 (MCO-) |
Always |
Below 1 Ω |
G49-6 (SNS2) - Body ground |
Always |
10 kΩ or higher |
G49-19 (MIN-) - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK | ![]() |
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY |
|
4. |
REPLACE TELEPHONE MICROPHONE ASSEMBLY |
(a) Replace the telephone microphone assembly (See page
).
(b) Clear the DTCs (See page ).
(c) Recheck for DTCs and check if the same DTC is output again.
OK:
No DTCs are output.
OK | ![]() |
END |
NG | ![]() |
REPLACE MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) |
Installation
INSTALLATION
PROCEDURE
1. INSTALL GENERATOR ASSEMBLY
(a) Install the generator bracket to the generator with the bolt.
Torque:
20 N·m {204 kgf·cm, 15 ft·lbf}
(b) Install the generator with the 2 bolts.
Torque:
43 N·m {438 kgf·cm, 32 ft·lbf}
(c ...
Generator Signal Circuit
DESCRIPTION
When the engine is started, the generator assembly turns on and a voltage pulse
signal is generated.
This signal is used by the air conditioning amplifier assembly.
The signal expressing the amount of output from the generator assembly is one ...