U1255

U1255 SATELLITE RADIO TUNER

Description








DTC Logic








Diagnosis Procedure

Regarding Wiring Diagram information, With Color Display Without Navigation System Bose Audio.

1. CHECK SATELLITE RADIO TUNER POWER SUPPLY AND GROUND CIRCUIT

Check satellite radio tuner power supply and ground circuit. With Color Display.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair malfunctioning parts.

2. CHECK CONTINUITY COMMUNICATION CIRCUIT AND REQUEST SIGNAL CIRCUIT






1.Turn ignition switch OFF.
2.Disconnect AV control unit connector M153 and satellite radio tuner connector B111.
3.Check continuity between AV control unit harness connector
M153 (A) and satellite radio tuner harness connector B111 (B).





4.Check continuity between AV control unit harness connector M153 (A) and ground.






Is the inspection result normal?
YES- GO TO 3.
NO- Repair harness or connector.

3. CHECK AV CONTROL UNIT VOLTAGE






1.Connect AV control unit connector.
2.Turn ignition switch ON.
3.Check voltage between AV control unit harness connector M153
and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- Replace AV control unit. With Color Display.

4. CHECK SATELLITE RADIO TUNER






1.Turn ignition switch OFF.
2.Disconnect AV control unit connector.
3.Connect satellite radio tuner.
4.Turn ignition switch ON.
5.Check voltage between satellite radio tuner harness connector terminal ground.





Is the inspection result normal?
YES- Inspection End.
NO- Replace satellite radio tuner. With Color Display.