Up to 08/2009
NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM (for DVD): Microphone Circuit between Microphone and Navigation ECU
- Microphone Circuit between Microphone and Navigation ECU
DESCRIPTION
This circuit sends a microphone signal from the map light assembly (telephone microphone assembly) to the display and navigation module display.
It also supplies power from the display and navigation module display to the map light assembly (telephone microphone assembly).
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. CHECK HARNESS AND CONNECTOR
(a) Disconnect the display and navigation module display connector.
(b) Disconnect the map light assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. INSPECT DISPLAY AND NAVIGATION MODULE DISPLAY
(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:
Text in Illustration
NG -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal
OK -- Continue to next step.
3. INSPECT MAP LIGHT ASSEMBLY
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPLACE TELEPHONE MICROPHONE ASSEMBLY
OK -- Continue to next step.
4. INSPECT MAP LIGHT ASSEMBLY
(a) Reconnect the display and navigation module display connector.
(b) Reconnect the map light assembly connector.
(c) Turn the engine switch on (ACC).
(d) Connect an oscilloscope to terminals 34 (MCO+) and 35 (MCO-) of the map light assembly connector.
(e) Check the waveform of the telephone microphone assembly using the oscilloscope.
Result:
Text in Illustration
NG -- REPLACE TELEPHONE MICROPHONE ASSEMBLY
OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table
5. REPLACE TELEPHONE MICROPHONE ASSEMBLY
(a) Replace the telephone microphone assembly Removal.
(b) Check if the same malfunction recurs.
Result:
B -- REPLACE MAP LIGHT ASSEMBLY Removal
A -- END