Navigation System Microphone Circuit Between Overhead J/B And Multi-Display
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK HARNESS AND CONNECTOR (OVERHEAD J/B - MULTI-DISPLAY)
INSPECT MULTI-DISPLAY (CRT DISPLAY) DISPLAY
NAVIGATION SYSTEM - Microphone Circuit between Overhead J/B and Multi-display |
DESCRIPTION
This circuit sends a microphone signal from the overhead J/B to the multi-display. It also supplies power from the multi-display to the overhead J/B.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK HARNESS AND CONNECTOR (OVERHEAD J/B - MULTI-DISPLAY) |
Disconnect the overhead J/B connector R5 and multi-display connector J51.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester connection
| Condition
| Specified condition
|
ACC - MACC
| Always
| Below 1 Ω
|
MI1+ - MIN+
| Always
| Below 1 Ω
|
MIC- - MIN-
| Always
| Below 1 Ω
|
TSW- - SGND
| Always
| Below 1 Ω
|
ACC - Body ground
| Always
| 10 kΩ or higher
|
MI1+ - Body ground
| Always
| 10 kΩ or higher
|
MIC- - Body ground
| Always
| 10 kΩ or higher
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 2.INSPECT MULTI-DISPLAY (CRT DISPLAY) DISPLAY |
Reconnect the multi-display connector J51.
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester connection
| Condition
| Specified condition
|
MACC - Body ground
| Engine switch on (ACC)
| 4 to 6 V
|
| OK |
|
|
|
| PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE |
|
