DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - NAVIGATION ECU)
CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - STEREO COMPONENT AMPLIFIER)
NAVIGATION SYSTEM - Navigation Voice Speaker Circuit
DESCRIPTION
This circuit is used when the voice guidance in the navigation system is on.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - NAVIGATION ECU) |
Disconnect the multi-display connector p1 and the navigation ECU connector p2.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
| Tester connection | Condition | Specified condition |
| VOI- - SI- | Always | Below 1 Ω |
| VOI+ - SI+ | Always | Below 1 Ω |
| VOI- - Body ground | Always | 10 kΩ or higher |
| VOI+ - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 2.CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - STEREO COMPONENT AMPLIFIER) |
Disconnect the multi-display connector J51 and stereo component amplifier connector P30.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
| Tester connection | Condition | Specified condition |
| IVO+ - II1+ | Always | Below 1 Ω |
| IVO- - II1- | Always | Below 1 Ω |
| IVO+ - Body ground | Always | 10 kΩ or higher |
| IVO- - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK | |
| |
| PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE |
|
LEXUS IS250, IS220d / GSE20 ALE20
