NAVIGATION SYSTEM - RDS-TMC Signal Circuit between Radio Receiver and Navigation ECU

DESCRIPTION

Traffic information received by the radio receiver is transmitted to the navigation ECU via this circuit.

If an open or short occurs in this circuit, RDS-TMC information will not be updated or the RDS-TMC will not operate normally.

Navigation System - Rds-Tmc Signal Circuit Between Radio Receiver And Navigation Ecu. NAVIGATION. Lexus IS250 IS220d GSE20 ALE20

1.CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - RADIO RECEIVER)

Disconnect the multi-display connector J50 and radio receiver connector J63.

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

Standard resistance:
Tester connection Condition Specified condition
CMP+ - CMP+ Always Below 1 Ω
CMP- - CMP- Always Below 1 Ω
CMP+ - Body ground Always 10 kΩ or higher
CMP- - Body ground Always 10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - MULTI-DISPLAY)

Disconnect the navigation ECU connector p2 and multi-display connector p1.

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

Standard resistance:
Tester connection Condition Specified condition
CMO- - CMP- Always Below 1 Ω
CMO+ - CMP+ Always Below 1 Ω
CMO- - Body ground Always 10 kΩ or higher
CMO+ - Body ground Always 10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

LEXUS IS250, IS220d / GSE20 ALE20