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Tahoe / Yukon Service Manual

DTC P30EC

Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions DTC Descriptor DTC P30EC Brake System Control Module Minimum Voltage Request Signal Message Counter Incorrect Symptom Byte Information: Symptom Byte List Circuit/System Description For an overview of the component/system, refer to: ABS Description and Operation Conditions for Running the DTC Ignition/Vehicle = ON Conditions for Setting the DTC K20 Engine Control Module = K160 Brake System Control Module — Message Counter Incorrect Actions Taken When the DTC Sets DTCs listed in the DTC Descriptor category = Type B DTC Conditions for Clearing the DTC DTCs listed in the DTC Descriptor category = Type B DTC Reference Information Schematic Reference Antilock Brake System Schematics Connector End View Reference Master Electrical Component List Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs DTC Type Reference Powertrain Diagnostic Trouble Code (DTC) Type Definitions Scan Tool Reference Control Module References Circuit/System Verification

  1. Ignition » On / Vehicle » In Service Mode
  2. Verify no other DTCs are set. ⇒ If other DTCs are set Refer to: Diagnostic Trouble Code (DTC) List - Vehicle ⇓ If no other DTCs are set
  3. Replace the component: K160 Brake System Control Module
  4. Verify the DTC does not set. ⇒ If the DTC is set Replace the component: K20 Engine Control Module ⇓ If the DTC is not set
  5. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification For control module replacement, programming, and setup refer to: Control Module References