Microphone Circuit Between Microphone And Multi-Display

AUDIO / VISUAL: ELECTRO MULTI VISION SYSTEM: Microphone Circuit between Microphone and Multi-display
- Microphone Circuit between Microphone and Multi-display

DESCRIPTION

* Using this circuit, the display and navigation module display sends power to the map light assembly (amplifier microphone assembly), and the map light assembly sends microphone signals to the display and navigation module display (w/o manual (SOS) switch).

* Using this circuit, the DCM (telematics transceiver) sends power to the map light assembly (amplifier microphone assembly), and the map light assembly (amplifier microphone assembly) sends microphone signals to the display and navigation module display via the DCM (telematics transceiver). The display and navigation module display and the map light assembly (amplifier microphone assembly) are connected to each other using the microphone connection detection signal lines (w/ manual (SOS) switch).

HINT
If there is open circuit between the DCM (telematics transceiver) and map light assembly (amplifier microphone assembly), the DCM (telematics transceiver) stores DTC B1572.

WIRING DIAGRAM

1. w/o Manual (SOS) Switch

2. w/ Manual (SOS) Switch

INSPECTION PROCEDURE

NOTICE:
When replacing the DCM (telematics transceiver), perform the Activate DCM procedure using the Techstream DCM Activation.

PROCEDURE

1. CONFIRM MODEL

(a) Choose the model to be inspected.

Result:

B -- CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - BODY GROUND)
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR

(a) Disconnect the K46 display and navigation module display connector.

(b) Disconnect the W6 map light assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT DISPLAY AND NAVIGATION MODULE DISPLAY

(a) Reconnect the K46 display and navigation module display connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Text in Illustration

NG -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal
OK -- Continue to next step.

4. INSPECT MAP LIGHT ASSEMBLY

(a) Reconnect the K46 display and navigation module display connector.

(b) Reconnect the W6 map light assembly connector.

(c) Turn the engine switch on (ACC).

(d) Connect an oscilloscope to terminals 3 (MI1+) and 2 (MIC-) of the W6 map light assembly connector.

(e) Check the waveform of the amplifier microphone assembly using the oscilloscope.

Result:

Text in Illustration

B -- REPLACE AMPLIFIER MICROPHONE ASSEMBLY

A -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table

5. REPLACE AMPLIFIER MICROPHONE ASSEMBLY

(a) Replace the amplifier microphone assembly Removal.

(b) Check if the same malfunction recurs.

Result:

B -- REPLACE MAP LIGHT ASSEMBLY Removal

A -- END

6. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - BODY GROUND)

(a) Disconnect the K46 display and navigation module display connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

7. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - DCM)

(a) Disconnect the K46 display and navigation module display connector.

(b) Disconnect the K98 DCM (telematics transceiver) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

8. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - MAP LIGHT ASSEMBLY)

(a) Disconnect the K98 DCM (telematics transceiver) connector.

(b) Disconnect the W6 map light assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

9. INSPECT DISPLAY AND NAVIGATION MODULE DISPLAY

(a) Reconnect the K46 display and navigation module display connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

NG -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal
OK -- Continue to next step.

10. INSPECT DCM (TELEMATICS TRANSCEIVER)

(a) Reconnect the K98 DCM (telematics transceiver) connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Text in Illustration

NG -- REPLACE DCM (TELEMATICS TRANSCEIVER) Removal
OK -- Continue to next step.

11. INSPECT MAP LIGHT ASSEMBLY

(a) Reconnect the K46 display and navigation module display connector.

(b) Reconnect the K98 DCM (telematics transceiver) connector.

(c) Reconnect the W6 map light assembly connector.

(d) Turn the engine switch on (ACC).

(e) Connect an oscilloscope to terminals 3 (MI1+) and 2 (MIC-) of the W6 map light assembly connector.

(f) Check the waveform of the amplifier microphone assembly using the oscilloscope.

Result:

Text in Illustration

B -- REPLACE AMPLIFIER MICROPHONE ASSEMBLY

A -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table

12. REPLACE AMPLIFIER MICROPHONE ASSEMBLY

(a) Replace the amplifier microphone assembly Removal.

(b) Check if the same malfunction recurs.

Result:

B -- REPLACE MAP LIGHT ASSEMBLY Removal

A -- END