DESCRIPTION
The radio and display receiver assembly and inner rear view mirror assembly (amplifier microphone assembly) are connected to each other using the microphone connection detection signal lines.
Using this circuit, the radio and display receiver assembly sends power to the inner rear view mirror assembly (amplifier microphone assembly), and the inner rear view mirror assembly (amplifier microphone assembly) sends microphone signals to the radio and display receiver assembly.
WIRING DIAGRAM
PROCEDURE
1. |
CHECK MICROPHONE (OPERATION CHECK) |
(a) Enter the "Microphone Check" screen. Refer to Check Microphone in Operation Check (See page ). |
|
(b) When a voice is input into the microphone, check that the microphone input level meter changes according to the input voice.
OK:
Check result is normal.
OK |
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY |
|
2. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) |
(a) Disconnect the E42 radio and display receiver assembly connector.
(b) Disconnect the P12 inner rear view mirror assembly (amplifier microphone assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
E42-4 (MACC) - P12-9 (ACC) |
Always |
Below 1 Ω |
E42-5 (MIN+) - P12-11 (MIC+) |
Always |
Below 1 Ω |
E42-19 (MIN-) - P12-12 (MIC-) |
Always |
Below 1 Ω |
E42-6 (SNS2) - P12-10 (SGND) |
Always |
Below 1 Ω |
E42-4 (MACC) - Body ground |
Always |
10 kΩ or higher |
E42-5 (MIN+) - Body ground |
Always |
10 kΩ or higher |
E42-19 (MIN-) - Body ground |
Always |
10 kΩ or higher |
E42-18 (SGND) - Body ground |
Always |
10 kΩ or higher |
E42-6 (SNS2) - Body ground |
Always |
10 kΩ or higher |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY |
(a) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
E42-18 (SGND) - Body ground |
Always |
Below 1 Ω |
E42-19 (MIN-) - Body ground |
Always |
Below 1 Ω |
*a |
Component with harness connected (Radio and Display Receiver Assembly) |
NG |
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY |
|
4. |
INSPECT INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) |
(a) Remove the inner rear view mirror assembly (amplifier microphone assembly) (See page ).
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
NG |
REPLACE INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) |
|
5. |
INSPECT INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) |
(a) Turn the ignition switch to ACC.
(b) Connect an oscilloscope to terminals 11 (MIC+) and 12 (MIC-) of the P12 inner rear view mirror assembly (amplifier microphone assembly) connector. |
|
(c) Check the waveform of the inner rear view mirror assembly (amplifier microphone assembly) using the oscilloscope.
Result |
Proceed to |
---|---|
A waveform synchronized with the voice input to the inner rear view mirror assembly (amplifier microphone assembly) is output. |
A |
A waveform synchronized with the voice input to the inner rear view mirror assembly (amplifier microphone assembly) is not output. |
B |
*a |
Component with harness connected (Inner Rear View Mirror Assembly (Amplifier Microphone Assembly)) |
A |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
B |
REPLACE INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) |
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" ...
Removal
REMOVAL
PROCEDURE
1. REMOVE AUTOMATIC TRANSAXLE ASSEMBLY
HINT:
See the steps from "Remove Engine Assembly with transaxle" through "Remove Automatic
Transaxle Assembly" (See page ).
2. REMOVE AUTOMATIC TRANSAXLE OIL PAN SUB-ASSEMBLY
...
Lost Communication with Front Satellite Sensor Bus (B161A/8A)
DESCRIPTION
The front collision sensor circuit (front airbag sensor RH circuit and front
airbag sensor LH circuit) is composed of the center airbag sensor assembly, front
airbag sensor RH and front airbag sensor LH.
The front airbag sensor RH or front ai ...