Pinpoint Test K: Poor Quality Or No Sound - Satellite Radio
Information and Entertainment System
Pinpoint Test K: Poor Quality Or No Sound - Satellite Radio
Normal Operation
Digital signals are received by the satellite radio antenna and sent directly to the Audio Front Control Module (ACM). The satellite receiver is internal to the ACM (Audio Front Control Module).
A short to ground in the satellite radio antenna will not set a DTC but the antenna performance may be degraded. An open in the antenna circuit results in no sound from the satellite radio system. A short to voltage in the antenna circuit can have varying effects on the system.
- DTC B1A89:01 (Satellite Antenna: General Electrical Failure)- can set when any fault is detected in the satellite radio antenna circuit.
- DTC B1A89:13 (Satellite Antenna: Circuit Open)- sets when an open is detected in the satellite antenna circuit.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Obstructions to the antenna line of sight
- No channel found in the selected category
- Satellite radio antenna cable
- Antenna
- ACM (Audio Front Control Module)
PINPOINT TEST K : POOR QUALITY OR NO SOUND - SATELLITE RADIO
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
K1 CHECK THE CATEGORY FILTER SETTING
- Turn the category filter function off. Refer to the Owner's Literature.
- Drive the vehicle to an open location, free of obstacles.
- Scan for a good channel.
Does the satellite radio system find a good channel with normal reception?
Yes
The system is operating correctly at this time. The concern was a result of no channel being found in the selected category.
No
GO to K2.
K2 CHECK THE SATELLITE SIGNAL PID (SAT_SIG_STR)
- Enter the following diagnostic mode on the scan tool: ACM (Audio Front Control Module) DataLogger.
- Monitor the ACM (Audio Front Control Module) PID (SAT_SIG_STR).
Does the PID indicate No Signal?
Yes
GO to K3.
No
GO to K5.
K3 CHECK THE SATELLITE RADIO ANTENNA CABLE RESISTANCE
- Ignition OFF.
- Disconnect: Satellite Radio Antenna Connection At ACM (Audio Front Control Module).
- Disconnect: Satellite Radio Antenna Cable In-Line Connection Behind Glove Compartment.
- Disconnect: Satellite Radio Antenna Connection At Satellite Radio Antenna.
- Measure the resistance of the lower satellite radio antenna cable core between the ACM (Audio Front Control Module) and the satellite radio antenna in-line connection; and between the lower satellite radio antenna cable core and shield.
- Measure the resistance of the upper satellite radio antenna cable core between the satellite radio antenna in-line connection and the satellite radio antenna; and between the upper satellite radio antenna cable core and shield.
Is the resistance of each satellite radio antenna cable core less than 2 ohms, and the resistance between the core and shield of each satellite radio antenna cable greater than 10,000 ohms?
Yes
GO to K4.
No
INSTALL a new front or rear satellite radio antenna cable, as necessary. REFER to Antenna Cable - Satellite Radio . CLEAR any DTCs present. TEST the system for normal operation.
K4 ISOLATE THE SATELLITE RADIO ANTENNA
- Install a new satellite radio antenna. Refer to Antenna- Satellite Radio .
- Operate the audio system in satellite radio mode.
Is the reception OK?
Yes
The concern was caused by an inoperative satellite radio antenna. The system is operating correctly at this time.
No
GO to K5.
K5 CHECK FOR CORRECT ACM (Audio Front Control Module) OPERATION
- Ignition OFF.
- Disconnect all the ACM (Audio Front Control Module) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the ACM (Audio Front Control Module) connectors and make sure they seat correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes
INSTALL a new ACM (Audio Front Control Module). REFER to Audio Control Module (ACM) . TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.