Checking the Component

Ensure that TMC is transmitted in the relevant area.

HINT: Check the system settings to ensure that traffic information is not deselected.

Check that connector H is correctly connected. On cars in Japan, connector I must also be checked.

Check the cable between the road traffic information (RTI) control module terminal #H1 and the TMC/FM multiplex (center pin) antenna amplifier terminal #1 (located at the bumper). Check for a short-circuit to supply voltage. Check for a short-circuit to ground. Check for an open-circuit.

Cars in Japan: Check the cable between the (RTI) road traffic information control module terminal #I1 and the FM multiplex (located in the rear windshield) antenna amplifier terminal #1. Check for a short-circuit to supply voltage. Check for a short-circuit to ground. Check for an open-circuit.

Check the two connectors on the TMC/FM multiplex amplifier.

Check the power supply to the TMC/FM multiplex amplifier from the radio by taking readings between the center pin on the TMC/FM multiplex amplifier and ground. It must be approximately 10 V. If the value is not approximately 10 V, fault trace according to the symptom "poor radio reception".

Remedy as necessary.

Other information:

To fault-trace the wiring and terminals, see Checking Wiring And Terminals
For information about system settings, see Systems Settings
For information about programming and replacing the road traffic information (RTI) control module, see Road Traffic Information Module (RTI), Replacing
To connect the breakout box, see Connecting the Breakout Box To the Road Traffic Information (RTI) Control Module
For information about signals and connectors, see Signal Specification, RTI .

Fig 1: Breakout Box

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault detected?

YES
OKAY: Troubleshooting has been completed.
NO
Refer to Replacing the Component