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Tahoe / Yukon Service Manual

DTC P10DA or P10DB

Engine Controls and Fuel - 3.0L LM2 Diesel | Diagnostic Information and Procedures | Document ID: 5501828 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 P10DA Reductant Control Module Ignition and Start Switch Circuit High DTC P10DB Reductant Control Module Ignition and Start Switch Circuit Low Circuit/System Description For an overview of the component/system, refer to: Exhaust Aftertreatment System Description Conditions for Running the DTC P10DA DTC P10F4, P20FF = Not set Ignition = Off Frequency the DTC runs = Continuously — After ignition Off — For greater than 3 s P10DB DTC P10F4, P20FF = Not set Ignition = On Ignition and Start Switch Signal = Greater than 11 V Frequency the DTC runs = Continuously — After the running conditions are met — For greater than 3 s Conditions for Setting the DTC P10DA Reductant Control Module Supply Voltage = Greater than a predefined threshold — For greater than 3 s P10DB Reductant Control Module Supply Voltage = Less than a predefined threshold — For greater than 3 s Actions Taken When the DTC Sets DTCs listed in the DTC Descriptor category = Type A DTC Conditions for Clearing the DTC DTCs listed in the DTC Descriptor category = Type A DTC Reference Information Schematic Reference Engine Controls 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 DTC P16D7, P16D8, P16D9, U010E, U021A, U023A, U029D, U029E, U02A9 is not set. ⇒ If any of the DTCs are set Refer to Diagnostic Trouble Code (DTC) List - Vehicle. ⇓ If none of the DTCs are set
  3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data. Verify the DTC does not set. ⇒ If the DTC sets Refer to: Circuit/System Testing ⇓ If the DTC is not set
  4. All OK. Circuit/System Testing
  5. Ignition/Vehicle & All vehicle systems » Off
  6. Disconnect the electrical connector: K115 Reductant Control Module
  7. Test for less than 1 V between the test points: Ignition circuit terminal 30 & Ground ⇒ If 1 V or greater 3.1. Remove the component: F47UA Fuse @ X50A Fuse Block - Underhood 3.2. Test for less than 1 V between the test points: F47UA Fuse — Input terminal & Ground ⇒ If 1 V or greater » Replace the component: KR75 Engine Controls Ignition Relay ⇓ If less than 1 V 3.3. Test for less than 1 V between the test points: Ignition circuit terminal 30 @ Control module harness & Ground ⇒ If 1 V or greater » Repair the short to voltage on the circuit. ⇓ If less than 1 V
  8. Ignition/Vehicle » On
  9. Test for greater than 9 V between the test points: Ignition circuit terminal 30 & Ground ⇒ If 9 V or less 5.1. Ignition/Vehicle & All vehicle systems » Off 5.2. Test for infinite resistance between the test points: Ignition circuit terminal 30 & Ground ⇒ If less than infinite resistance » Repair the short to ground on the circuit. ⇓ If infinite resistance 5.3. Test for less than 2 Ω between the test points: Ignition circuit terminal 30 @ Component harness & F47UA Fuse @ X50A Fuse Block - Underhood ⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit. ⇒ If less than 2 Ω » Replace the component: KR75 Engine Controls Ignition Relay ⇓ If greater than 9 V
  10. Replace the component: K115 Reductant Control Module Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification Reductant Control Module Replacement — K115 Reductant Control Module For control module replacement, programming, and setup refer to: Control Module References