RDS-TMC Signal Circuit between Radio Receiver and Navigation ECU
Circuit diagnosis
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.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 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
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| OK | |
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| 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
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| OK | ||
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