Microphone Circuit Between Microphone and Navigation ECU
NAVIGATION: NAVIGATION SYSTEM (for DVD): Microphone Circuit between Microphone and Navigation ECU
- Microphone Circuit between Microphone and Navigation ECU
DESCRIPTION
Using this circuit, the telematics transceiver sends power to the map light assembly (telephone microphone assembly), and the map light assembly (telephone microphone assembly) sends microphone signals to the display and navigation module display. The display and navigation module display and map light assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. INSPECT DISPLAY AND NAVIGATION MODULE DISPLAY
(a) 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.
2. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - MAP LIGHT ASSEMBLY)
(a) Disconnect the L59 display and navigation module display connector.
(b) Disconnect the X4 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. CHECK DISPLAY AND NAVIGATION MODULE DISPLAY
(a) Reconnect the L59 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. CHECK MAP LIGHT ASSEMBLY
(a) Disconnect the X4 map light assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- CHECK MAP LIGHT ASSEMBLY
OK -- Continue to next step.
5. CHECK MAP LIGHT ASSEMBLY
(a) Reconnect the L59 display and navigation module display connector.
(b) Reconnect the X4 map light assembly connector.
(c) Turn the engine switch on (ACC).
(d) Connect an oscilloscope to terminals 21 (MI1+) and 20 (MIC-) of the X4 telephone microphone assembly connector.
(e) Check the waveform of the telephone microphone assembly using the oscilloscope.
Text in Illustration
Result
B -- CHECK MAP LIGHT ASSEMBLY
A -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table
6. CHECK MAP LIGHT ASSEMBLY
(a) Replace the telephone microphone assembly Removal.
(b) Check if the same malfunction recurs.
Result
B -- REPLACE MAP LIGHT ASSEMBLY Removal
A -- END