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z A message shall be sent out on the class 2 lines to notify all other modules of low battery voltage. z The modules disable the setting of U codes and other DTCs. Conditions for Clearing the DTC z The DTC will clear current status when the voltage is greater than 9.5 volts for 1.2 seconds. z A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no z Use the ON-Board clearing DTCs feature. z Use a scan tool. Test Description The numbers below refer to the step numbers on the diagnostic table. 3: Tests for the proper voltage at battery positive voltage sense circuit of the module, if voltage is not 4: Tests the circuit for high resistance. 5: Tests for the proper ground circuit for the module. DTC B1327 Step Action Value (s) Yes No Schematic Reference:Starting and Charging Schematics or Power Distribution Schematics in 1 Did you perform the Engine Electrical Diagnostic System - Go to Step 2 Go to Diagnostic System Check - Engine Electrical 2 1. Install a scan tool. 2. Turn ON the ignition, with the engine OFF. 3. With a scan tool, observe the battery voltage parameter in the affected module data list. Or with a DMM, Does the voltage measure greater than the specified value? 9.4 V Go to Step 6 Go to Step 3 3 1. Turn OFF the ignition. 2. Disconnect the harness connector of the module setting the DTC B1327. 3. Measure the voltage between the battery positive voltage circuit of the module setting the DTC B1327 9.4 V
2004 Hummer H2 2004 ELECTRICAL Engine Electrical - Hummer H2
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