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Tahoe / Yukon Service Manual

DTC P007B or P10D5

Engine Controls and Fuel - 3.0L LM2 Diesel | Diagnostic Information and Procedures | Document ID: 5501016 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 P007B Charge Air Cooler Temperature Sensor Performance DTC P10D5 Charge Air Cooler Temperature Sensor 2 Performance Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performanc
Signal — Terminal 1 @ B193A Charge Air Cooler Air Temperature Sensor - Inlet P007C P007D P007D* P007B, P007E, P026A
Signal — Terminal 2 @ B193A Charge Air Cooler Air Temperature Sensor - Inlet — P007D, P007E — P007B, P007E, P026A
Signal — Terminal 1 @ B193B Charge Air Cooler Air Temperature Sensor - Outlet P10D6 P10D7 P10D7* P026A, P10D5, P10D8
Signal — Terminal 2 @ B193B Charge Air Cooler Air Temperature Sensor - Outlet — P10D7 — P026A, P10D5, P10D8
* Component damage may occur if the circuit is shorted to B+.

Typical Scan Tool Data Charge Air Cooler Temperature Sensor & Charge Air Cooler Temperature Sensor 2 Short to Short to Circuit Ground Open Voltage Operating Conditions: Engine = Idling — At normal operating temperature. Parameter Normal Range: Charge Air Cooler Temperature Sensor = 43 to 54°C (110 to 130°F) Charge Air Cooler Temperature Sensor 2 = 16 to 38°C (60 to 100°F)

Circuit Short to Ground Open Short to Voltage
Signal — Terminal 1 215°C (419°F) −40°C (−40°F) −40°C (−40°F)
Signal — Terminal 2 215°C (419°F) −40°C (−40°F) −40°C (−40°F)

Circuit/System Description For an overview of the component/system, refer to: Compressor Air Intake Turbocharger System Description

Circuit Description
Signal — Terminal 1 The control module input circuit has an internal resistance connected to 0.5 V.
Signal — Terminal 2 The control module input circuit has an internal resistance connected to 2.5 V.
Component Description
B193A Charge Air Cooler Air Temperature Sensor - Inlet B193B Charge Air Cooler Air Temperature Sensor - Outlet The temperature sensor is a negative temperature coefficient thermistor, a resistor which changes based on temperature.
K20 Engine Control Module The control module contains a microprocessor used to process input data to control outputs. The control module controls a series of actuators to ensure optimal engine performance. The control module does this by reading values from a variety of sensors, interprets the data and adjusts the engine actuators accordingly.

Conditions for Running the DTC DTC P007C, P007D, P007E, P00E9, P00EA, P00EB, P00EC, P0181, P10D6–P10D8, P2610, P262B = Not set Ignition and Start Switch Signal = Off — For greater than 8 h Ignition and Start Switch Signal = On — For less than 2 s Ignition and Start Signal = Greater than 11 V Fuel Temperature & Intake Air Temperature Sensor 3 Within 20°C (36°F) of each other Frequency the DTC runs = Once — After the running conditions are met Conditions for Setting the DTC P007B The following parameters are not within 20°C (36°F) of each other: Charge Air Cooler Temperature Sensor Fuel Temperature Sensor Intake Air Temperature Sensor 3 P10D5 The following parameters are not within 20°C (36°F) of each other: Charge Air Cooler Temperature Sensor 2 Fuel Temperature Sensor Intake Air Temperature Sensor 3 Actions Taken When the DTC Sets DTCs listed in the DTC Descriptor category = Type B DTC Particulate Filter Regeneration Status = Inhibited Reduced Engine Power = Active Conditions for Clearing the DTC DTCs listed in the DTC Descriptor category = Type B DTC Reference Information Schematic Reference Engine Heating/Cooling 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 P00E9, P00EA, P00EB, P00EC, P007C, P007D, P007E, P10D6, P10D7, P10D8, P0181, P2610 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. Verify the scan tool Freeze Frame/Failure Records parameter: = Within 20°C (36°F) of each other { P007B } Start-Up Charge Air Cooler Temperature { P10D5 } Start-Up Charge Air Cooler Temperature Sensor 2 Start-Up Intake Air Temperature Sensor 3 Start-Up Fuel Temperature ⇒ If not in the specified range Refer to: DTC P007C-P007E or P10D6-P10D8 ⇓ If in the specified range
  4. Engine » Idling
  5. Verify the scan tool parameter: = −39 to 215°C (−38 to 419°F) and changes Charge Air Cooler Temperature Sensor Charge Air Cooler Temperature Sensor 2 ⇒ If not in the specified range or does not change Refer to: DTC P007C-P007E or P10D6-P10D8 ⇓ If in the specified range and changes
  6. Perform the action while monitoring the parameter: Charge Air Cooler Temperature Sensor Charge Air Cooler Temperature Sensor 2 Wiggle the harness and connector: B193A Charge Air Cooler Air Temperature Sensor - Inlet — The value should not spike or drop out. Wiggle the harness and connector: B193B Charge Air Cooler Air Temperature Sensor - Outlet — The value should not spike or drop out. Wiggle the harness and connector: K20 Engine Control Module — The value should not spike or drop out. ⇒ If the value spikes or drops out Repair as necessary » Wiring / Terminal(s) / Electrical Connector(s) ⇓ If the value does not spike or drop out
  7. Ignition/Vehicle & All vehicle systems » Off
  8. Verify the following conditions do not exist: B65 Intake Manifold Pressure and Air Temperature Sensor — Leaking @ O-Ring — Missing / Visible Damage Intake Air Duct — Collapsed / Loose Clamps / Restricted / Visible Damage Intake Manifold — Cracked / Loose Clamps / Visible Damage » Refer to: Intake Manifold Replacement Charge Air Cooler – Leaking — Loose Clamps / Visible Damage – Restricted — Moisture / Ice Refer to: Component/System Leak Test ⇒ If a condition exists » Repair or replace as necessary
  9. All OK. Component Testing
  10. Ignition/Vehicle » Off
  11. Disconnect the appropriate electrical connector: B193A Charge Air Cooler Air Temperature Sensor - Inlet B193B Charge Air Cooler Air Temperature Sensor - Outlet
  12. Test for 200 to 114,900 Ω between the test points: Signal terminal 2 & Low Reference terminal 1 ⇒ If not between 200 and 114,900 Ω Replace the component: B193A Charge Air Cooler Air Temperature Sensor - Inlet or B193B  Charge Air Cooler Air Temperature Sensor - Outlet ⇓ If between 200 and 114,900 Ω
  13. Verify the value is within the range listed in the table: Temperature Versus Resistance - Charge Air Cooler Temperature Sensor ⇒ If not in the specified range Replace the component: B193A Charge Air Cooler Air Temperature Sensor - Inlet or B193B  Charge Air Cooler Air Temperature Sensor - Outlet ⇓ If in the specified range
  14. Test for infinite resistance between the test points: Each terminal of the component & The component’s housing ⇒ If less than infinite resistance Replace the component: B193A Charge Air Cooler Air Temperature Sensor - Inlet or B193B  Charge Air Cooler Air Temperature Sensor - Outlet ⇓ If infinite resistance
  15. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification Charge Air Cooler Air Temperature Sensor Replacement — B193A Charge Air Cooler Air Temperature Sensor - Inlet Charge Air Temperature Secondary Sensor Replacement — B193B Charge Air Cooler Air Temperature Sensor - Outlet For control module replacement, programming, and setup refer to: Control Module References