Microphone Circuit Between Microphone and Navigation ECU
NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM (for HDD): Microphone Circuit between Microphone and Navigation ECU
- Microphone Circuit between Microphone and Navigation ECU
DESCRIPTION
* The navigation computer sub-assembly and map light assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines.
* Using this circuit, the navigation computer sub-assembly sends power to the map light assembly (telephone microphone assembly), and the map light assembly sends microphone signals to the navigation computer sub-assembly (w/o manual (SOS) switch).
* Using this circuit, the DCM (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 navigation computer sub-assembly via the DCM (telematics transceiver) (w/ manual (SOS) switch).
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
If the DCM (telematics transceiver) has been replaced, perform the Activate DCM procedure using the Techstream DCM Activation (w/ Manual (SOS) switch).
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 H60 navigation computer sub-assembly connector.
(b) Disconnect the T6 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 NAVIGATION COMPUTER SUB-ASSEMBLY
(a) Reconnect the H60 navigation computer sub-assembly connector.
(b) Reconnect the T6 map light assembly connector.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
(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 NAVIGATION COMPUTER SUB-ASSEMBLY Removal
4. CHECK HARNESS AND CONNECTOR
(a) Disconnect the H60 navigation computer sub-assembly connector.
(b) Disconnect the T6 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. CHECK HARNESS AND CONNECTOR
(a) Disconnect the H60 navigation computer sub-assembly connector.
(b) Disconnect the H67 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.
6. CHECK HARNESS AND CONNECTOR
(a) Disconnect the H67 DCM (telematics transceiver) connector.
(b) Disconnect the T6 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.
7. INSPECT NAVIGATION COMPUTER SUB-ASSEMBLY
(a) Disconnect the H67 DCM (telematics transceiver) connector.
(b) Reconnect the H60 navigation computer sub-assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPLACE NAVIGATION COMPUTER SUB-ASSEMBLY Removal
OK -- Continue to next step.
8. INSPECT DCM (TELEMATICS TRANSCEIVER)
(a) Reconnect the H67 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.
9. INSPECT MAP LIGHT ASSEMBLY
(a) Disconnect the T6 map light assembly connector.
(b) 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.
10. INSPECT MAP LIGHT ASSEMBLY
(a) Reconnect the H60 navigation computer sub-assembly connector.
(b) Reconnect the H67 DCM (telematics transceiver) connector (w/ manual (SOS) switch).
(c) Reconnect the T6 map light assembly connector.
(d) Turn the power switch on (ACC).
(e) Connect an oscilloscope to terminals 13 (MCO+) and 12 (MCO-) of the T6 map light 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 Problem Symptoms Table
11. 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