Microphone Circuit Between Multi-Display and Navigation ECU

NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: 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 via the telematics transceiver. 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 F47 display and navigation module display connector.

(b) Disconnect the R7 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 HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - TELEMATICS TRANSCEIVER)

(a) Disconnect the F47 display and navigation module display connector.

(b) Disconnect the P2 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.

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

(a) Disconnect the P2 telematics transceiver connector.

(b) Disconnect the R7 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.

5. INSPECT TELEMATICS TRANSCEIVER

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





Standard Voltage:





Text in Illustration





NG -- REPLACE TELEMATICS TRANSCEIVER
OK -- Continue to next step.

6. 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.

7. INSPECT MAP LIGHT ASSEMBLY

(a) Reconnect the F47 display and navigation module display connector.





(b) Reconnect the P2 telematics transceiver connector.

(c) Reconnect the R7 map light assembly connector.

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

(e) Connect an oscilloscope to terminals 27 (MI1+) and 26 (MIC-) of the R7 telephone microphone assembly connector.

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

Result





Text in Illustration





B -- REPLACE TELEPHONE MICROPHONE ASSEMBLY

A -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

8. 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