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 |
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| 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 |
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LEXUS IS250, IS220d / GSE20 ALE20
