Sound Signal Circuit Check [Satellite Radio Tuner]
Sound Signal Circuit Check [Satellite Radio Tuner]
Description
Left and right channel audio signals are supplied from the satellite radio tuner to the audio unit through the sound signal circuits.
Diagnosis Procedure (Crew Cab)
Regarding Wiring Diagram information, refer to [Mid Audio System: Wiring Diagram [Crew Cab] Mid Audio System [Crew Cab] ].
Left Channel
1. CHECK HARNESS
1 Turn ignition switch OFF.
2 Disconnect satellite radio tuner (factory installed) connector M41 and audio unit connector M86.
3 Check continuity between satellite radio tuner (factory installed) connector M41 (A) and audio unit connector M86 (B).
4 Check continuity between satellite radio tuner (factory installed) connector M41 (A) and ground.
Are continuity results as specified?
YES
GO TO 2
NO
Repair or replace harness or connector.
2. CHECK LEFT CHANNEL AUDIO SIGNAL
1 Connect satellite radio tuner (factory installed) and audio unit.
2 Turn ignition switch ON.
3 Check signal between satellite radio tuner (factory installed) connector M41 terminals 21 and 22 with SDT or oscilloscope.
Are voltage readings as specified?
YES
Replace audio unit. Refer to [Audio Unit: Removal and Installation] Audio Unit.
NO
Replace satellite radio tuner. Refer to [Satellite Radio Tuner: Removal and Installation] Mid (Crew Cab), Premium (King Cab).
Right Channel
1. CHECK HARNESS
1 Turn ignition switch OFF.
2 Disconnect satellite radio tuner (factory installed) connector M41 and audio unit connector M86.
3 Check continuity between satellite radio tuner (factory installed) M41 (A) and audio unit M86 (B).
4 Check continuity between satellite radio tuner (factory installed) connector M41 (A) and ground.
Are continuity results as specified?
YES
GO TO 2
NO
Repair or replace harness or connector.
2. CHECK RIGHT CHANNEL AUDIO SIGNAL
1 Connect satellite radio tuner (factory installed) and audio unit.
2 Turn ignition switch ON.
3 Check signal between satellite radio tuner (factory installed) connector M41 terminals 23 and 24 with SDT or oscilloscope.
Are voltage readings as specified?
YES
Replace audio unit. Refer to [Audio Unit: Removal and Installation] Audio Unit.
NO
Replace satellite radio tuner. Refer to [Satellite Radio Tuner: Removal and Installation] Mid (Crew Cab), Premium (King Cab).
Diagnosis Procedure (King Cab)
Regarding Wiring Diagram information, refer to [Premium Audio System: Wiring Diagram [King Cab] Premium Audio System [King Cab] ].
Left Channel
1. CHECK HARNESS
1 Turn ignition switch OFF.
2 Disconnect satellite radio tuner (factory installed) connector M41 and audio unit connector M42.
3 Check continuity between satellite radio tuner (factory installed) connector M41 (A) and audio unit connector M42 (B).
4 Check continuity between satellite radio tuner (factory installed) connector M41 (A) and ground.
Are continuity results as specified?
YES
GO TO 2
NO
Repair or replace harness or connector.
2. CHECK LEFT CHANNEL AUDIO SIGNAL
1 Connect satellite radio tuner (factory installed) and audio unit.
2 Turn ignition switch ON.
3 Check signal between satellite radio tuner (factory installed) connector M41 terminals 21 and 22 with SDT or oscilloscope.
Are voltage readings as specified?
YES
Replace audio unit. Refer to [Audio Unit: Removal and Installation] Audio Unit.
NO
Replace satellite radio tuner. Refer to [Satellite Radio Tuner: Removal and Installation] Mid (Crew Cab), Premium (King Cab).
Right Channel
1. CHECK HARNESS
1 Turn ignition switch OFF.
2 Disconnect satellite radio tuner (factory installed) connector M41 and audio unit connector M42.
3 Check continuity between satellite radio tuner (factory installed) M41 (A) and audio unit M42 (B).
4 Check continuity between satellite radio tuner (factory installed) connector M41 (A) and ground.
Are continuity results as specified?
YES
GO TO 2
NO
Repair or replace harness or connector.
2. CHECK RIGHT CHANNEL AUDIO SIGNAL
1 Connect satellite radio tuner (factory installed) and audio unit.
2 Turn ignition switch ON.
3 Check signal between satellite radio tuner (factory installed) connector M41 terminals 23 and 24 with SDT or oscilloscope.
Are voltage readings as specified?
YES
Replace audio unit. Refer to [Audio Unit: Removal and Installation] Audio Unit.
NO
Replace satellite radio tuner. Refer to [Satellite Radio Tuner: Removal and Installation] Mid (Crew Cab), Premium (King Cab).