Part 1

NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: Microphone Circuit between Microphone and Navigation Receiver Assembly
- Microphone Circuit between Microphone and Navigation Receiver Assembly

DESCRIPTION

* Using this circuit, the navigation receiver assembly sends power to the map light assembly (telephone microphone assembly), and the map light assembly sends microphone signals to the navigation receiver 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 receiver assembly via the DCM (telematics transceiver). The navigation receiver assembly and map light assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines (w/ manual (SOS) switch).

WIRING DIAGRAM

1. w/o Manual (SOS) Switch

2. w/ Manual (SOS) Switch

INSPECTION PROCEDURE

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 -- CONFIRM MODEL
A -- Continue to next step.

2. CONFIRM MODEL

(a) Choose the model to be inspected.

Result:

B -- CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY)
A -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY)

(a) Disconnect the L37 navigation receiver assembly connector.

(b) Disconnect the U3 map light assembly connector.

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. INSPECT NAVIGATION RECEIVER ASSEMBLY

(a) Disconnect the U3 map light assembly connector.

(b) Reconnect the L37 navigation receiver assembly connector.

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

Standard Resistance:

Text in Illustration

NG -- REPLACE NAVIGATION RECEIVER ASSEMBLY Removal
OK -- Continue to next step.

5. 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.

6. INSPECT MAP LIGHT ASSEMBLY

(a) Reconnect the L37 navigation receiver assembly connector.

(b) Reconnect the U3 map light assembly connector.

(c) Turn the power switch on (ACC).

(d) Connect an oscilloscope to terminals 4 (MCO+) and 3 (MCO-) of the U3 map light assembly connector.

(e) 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

7. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY)

(a) Disconnect the L37 navigation receiver assembly connector.

(b) Disconnect the U13 map light assembly connector.

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

8. INSPECT NAVIGATION RECEIVER ASSEMBLY

(a) Disconnect the U3 map light assembly connector.

(b) Reconnect the L37 navigation receiver assembly connector.

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

Standard Resistance:

Text in Illustration

NG -- REPLACE NAVIGATION RECEIVER ASSEMBLY Removal
OK -- Continue to next step.

9. 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.

10. INSPECT MAP LIGHT ASSEMBLY

(a) Reconnect the L37 navigation receiver assembly connector.

(b) Reconnect the U13 map light assembly connector.

(c) Turn the power switch on (ACC).

(d) Connect an oscilloscope to terminals 5 (MCO+) and 4 (MCO-) of the U13 map light assembly connector.

(e) 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.

HINT
* w/o Sliding Roof Removal
* w/ Sliding Roof Removal

(b) Check if the same malfunction recurs.

Result:

B -- REPLACE MAP LIGHT ASSEMBLY Removal

A -- END

12. CONFIRM MODEL

(a) Choose the model to be inspected.

Result:

B -- CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY)
A -- Continue to next step.

13. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY)

(a) Disconnect the L37 navigation receiver assembly connector.

(b) Disconnect the U3 map light assembly connector.

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

14. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - DCM)

(a) Disconnect the L37 navigation receiver assembly connector.

(b) Disconnect the L19 DCM (telematics transceiver) connector.

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

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

(a) Disconnect the L19 DCM (telematics transceiver) connector.

(b) Disconnect the U3 map light assembly connector.

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

16. INSPECT NAVIGATION RECEIVER ASSEMBLY

(a) Reconnect the L37 navigation receiver assembly connector.

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

Standard Resistance:

Text in Illustration

NG -- REPLACE NAVIGATION RECEIVER ASSEMBLY Removal
OK -- Continue to next step.