Microphone Circuit between Microphone and Navigation ECU

NAVIGATION: NAVIGATION SYSTEM (for HDD): Microphone Circuit between Microphone and Navigation ECU
- Microphone Circuit between Microphone and Navigation ECU

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). (w/ manual (SOS) switch)

WIRING DIAGRAM

NOTICE:
If the DCM (telematics transceiver) has been replaced, 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
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) Disconnect the W6 map light assembly connector.

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

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

Standard Resistance:

(e) Proceed to the next step based on the inspection result.

Result:

Text in Illustration

B -- INSPECT MAP LIGHT ASSEMBLY

A -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal

4. CHECK HARNESS AND CONNECTOR

(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.

5. CHECK HARNESS AND CONNECTOR

(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.

6. INSPECT DISPLAY AND NAVIGATION MODULE DISPLAY

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

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

Text in Illustration

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

7. INSPECT DCM (TELEMATICS TRANSCEIVER)

(a) 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.

8. INSPECT MAP LIGHT ASSEMBLY

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

(b) Reconnect the K98 DCM (telematics transceiver) connector. (w/ manual (SOS) switch)

(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

9. REPLACE AMPLIFIER MICROPHONE ASSEMBLY

(a) Replace the amplifier microphone assembly Removal.

(b) Check if the same malfunction recurs.

Result:

B -- REPLACE MAP LIGHT ASSEMBLY

A -- END