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Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURE - *NO RESPONSE FROM SATELLITE RADIO RECEIVER

TEST ACTION APPLICABILITY
1
NOTE: Ensure the DRBIII® can communicate with the Radio, if not refer to the appropriate symptom.
Turn the ignition off.Disconnect the Radio C2 harness connector.Disconnect the Satellite Receiver harness connector.Visually inspect the connectors for damage.Check for open circuits in the wiring harness between the Radio and the Satellite Radio Receiver.Measure the resistance of the each circuit between the Radio C2 connector and the Satellite Radio Receiver connector.Check for shorted circuits in the wiring harness between the Radio and the Satellite Radio Receiver.Measure the resistance between each circuit at the Radio C2 connector.
NOTE: If vehicle is equipped with a hands free phone module, check connectors. This devise is a pass through for the satellite radio receiver circuits.
Are any of the circuits shorted together or open?Yes --> Replace/repair the SDARS wiring harness.Perform BODY VERIFICATION TEST - VER 1  .No --> Go To 2		 All
2 Use Scope input cable CH7058, Cable to Probe adapter CH7062, and the red and black test probes.
Connect the scope input cable to the channel one connector on the DRB. Attach the red and black leads and the cable to probe adapter to the scope input cable.
With the DRBIII® select Pep Module Tools.
Select lab scope.
Select Live Data.
Select 12 volt square wave.
Press F2 for Scope.
Press F2 and use the down arrow to set voltage range to 20 volts. Press F2 again when complete.
Disconnect the Satellite Radio Receiver harness connector.
NOTE: If vehicle is equipped with a hands free phone module, check connectors. This devise is a pass through for the satellite radio receiver circuits.

Connect the Black lead to the chassis ground. Connect the Red lead to the PCI Bus circuit in the Satellite Radio Receiver connector.
Reconnect the Radio C2 harness connector.
Turn the ignition on.
Turn the Radio on and place the radio in the Satellite mode.
Observe the voltage display on the DRB Lab Scope.
Does the voltage pulse from 0 to approximately 7.5 volts?
Yes --> Go To 3
No --> Replace the Radio.
Perform BODY VERIFICATION TEST - VER 1  .		 All
3 Turn the ignition off.
Disconnect the Satellite Radio Receiver harness connector.
NOTE: If vehicle is equipped with a hands free phone module, check connectors. This devise is a pass through for the satellite radio receiver circuits.

Turn the ignition on.
Turn the Radio on and place the radio in the Satellite mode.
Using a 12-volt test light connected to ground, probe the Ignition RUN/ACC Signal circuit.
Is the test light illuminated?
Yes --> Go To 4
No --> Replace the Radio.
Perform BODY VERIFICATION TEST - VER 1  .		 All
4 Turn the ignition off.
Disconnect the Satellite Radio Receiver harness connector.
NOTE: If vehicle is equipped with a hands free phone module, check connectors. This devise is a pass through for the satellite radio receiver circuits.

Using a 12-volt test light connected to 12-volts, probe the ground circuit.
Is the test light illuminated?
Yes --> Replace the Satellite Radio Receiver in accordance with the service information
Perform BODY VERIFICATION TEST - VER 1  .
No --> Repair the ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1  .		 All
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