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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (Cellular, Entertainment, And Navigation) >> Diagnostic Information and Procedures >> DTC B1235 >> Test Description

Test Description

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 2:  This step helps to determine if the diversity antenna system is operating.
  1. 3:  This step helps to determine if radio antenna module is receiving the proper signal from the radio.
DTC B1235

Step Action Yes No
Schematic Reference:  Radio/Navigation System Schematics 
 
Connector End View Reference:  Entertainment/Communication Connector End Views 
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle
2 
  1. Turn ON the ignition, with the engine OFF.
  2. Turn ON the radio.
  3. Press the scan button.
Do the local AM/FM stations come in clearly?		 Go to Testing for Intermittent Conditions and Poor Connections Go to Step 3 
3 
  1. Remove the radio.
  2. Test the antenna enable/amplifier on signal circuit for a short or open.
Did you locate and correct the condition?		 Go to Step 4  Go to Testing for Intermittent Conditions and Poor Connections
4 Operate the system in order to verify the repair.
Did you complete the repair?		 System OK -
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