NAVIGATION SYSTEM - Navigation Voice Speaker Circuit

DESCRIPTION

This circuit is used when the voice guidance in the navigation system is on.

Navigation System - Navigation Voice Speaker Circuit. NAVIGATION. Lexus IS250 IS220d GSE20 ALE20

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

OK

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

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE