P10CF
DTC P10CF
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC P10CF
- Charge Air Cooler Temperature - Intake Air Temperature (IAT) Sensor 3 Correlation
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The charge air cooler (CAC) temperature sensor and intake air temperature (IAT) sensor 3 are variable resistors. The IAT sensor 3 is located in the CAC inlet duct. The CAC temperature sensor is located in the CAC outlet duct before the throttle body assembly. The engine control module (ECM) supplies 5 V to the signal circuits, and a ground for each sensor's low reference circuit. The ECM monitors the CAC temperature sensor and the IAT sensor 3 circuits in order to calculate the temperature of the fuel air. The ECM monitors the CAC sensor and IAT sensor 3 signal for excessively high or low voltages, or for a voltage that is not in correlation with the other sensor's start up signal.
Conditions for Running the DTC
Condition 1
* Ignition has been OFF for 8 hours or more.
* The engine is running.
* The Ambient temperature is warmer than -60°C (-76°F).
OR
Condition 2
* Ignition has been OFF for 8 hours or more.
* The engine is running.
* The Ambient temperature is warmer than -60°C (-76°F).
* In the first 60 s of engine run time, the ECM determines the block heater is OFF.
AND
* In the first 10 minutes of engine run time, the vehicle speed as been at least 24 Km/h (15 mph) for at least 5 minutes and the ECM determines there is no sun load.
This DTC runs once per key cycle when the conditions in 1 or 2 are met.
Conditions for Setting the DTC
Condition 1
The ECM determines the absolute temperature difference between the CAC Temperature Sensor signal and the IAT Sensor 3 signal is more than 100°C (180°F) at start up.
OR
Condition 2
* The ECM determines the absolute temperature difference between the CAC Temperature Sensor signal and the IAT Sensor 3 signal is more than 35°C (63°F), but less than or equal to 100°C (180°F) after 10 minutes of engine run time.
* The ECM determines the block heater if OFF.
* The ECM determines there is no sun load.
Action Taken When the DTC Sets
DTC P10CF is a Type B DTC.
Conditions for Clearing the DTC
DTC P10CF is a Type B DTC.
Diagnostic Aids
* The CAC Temperature Sensor is located after the outlet from the CAC. The CAC Temperature Sensor is also known as the CAC Outlet Temperature Sensor (Charge Air Outlet Duct).
* The IAT Sensor 3 is located before the inlet to the CAC. The IAT Sensor 3 is also known as the CAC Inlet Temperature Sensor (Turbocharger).
* Skewed temperature sensors may cause this DTC to set.
Reference Information
Schematic Reference
Engine Controls Schematics [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
Note:
* To minimize the effects of residual engine heat and sensor internal heating elements, perform Steps 1 and 2 of this verification procedure only if the ignition has been OFF for 8 hours or more.
* The vehicle sitting in direct sun light or having the block heater ON will skew the results.
1. Ignition ON.
2. Verify the following scan tool parameters are within 15°C (27°F) of each other.
* CAC Temperature Sensor
* IAT Sensor 3
• If not within 15°C (27°F)
Refer to Circuit System Testing.
• If within 15°C (27°F)
3. Engine idling.
4. Verify the following scan tool parameters are within the specified ranges.
* IAT Sensor 3; -39 to +213°C (-38 to +415°F)
* CAC Temperature Sensor;-39 to +198°C (-38 to +388°F)
• If not within the specified ranges
Refer to Circuit System Testing.
• If within the specified ranges
5. 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.
6. Verify a DTC does not set.
• If the DTC sets
Refer to Circuit/System Testing.
• If the DTC does not set
7. All OK.
Circuit/System Testing
Note:
* You must perform the Circuit/System Verification before proceeding with the Circuit/System Testing.
* You must perform the Diagnostic Repair Verification after completing the Circuit/System Testing.
1. Ignition OFF, disconnect the harness connector at the B193A Charge Air Cooler Temperature sensor.
2. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 2 ohms between the B193A Charge Air Cooler Temperature sensor low reference circuit terminal 2 and ground.
• If 2 ohms or greater
1. Ignition OFF, disconnect the X3 harness connector at the K20 Engine Control Module.
2. Test for less than 2 ohms in the low reference circuit end to end.
• If 2 ohms or greater, repair the open or high resistance in the circuit.
• If less than 2 ohms replace the K20 Engine Control Module.
• If less than 2 ohms
3. Test for 4.8-5.2 V between the signal circuit terminal 1 and ground.
• If less than 4.8 V
1. Ignition OFF, disconnect the X3 harness connector at the K20 Engine Control Module.
2. Test for infinite resistance between the signal circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K20 Engine Control Module.
• If greater than 5.2 V
Note: If the signal circuit is shorted to a voltage the engine control module or the sensor may be damaged.
1. Ignition OFF, disconnect the X3 harness connector at the K20 Engine Control Module, ignition ON.
2. Test for less than 1 V between the signal circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the K20 Engine Control Module.
• If between 4.8-5.2 V
4. Ignition OFF, disconnect the harness connector at the Intake Air Temperature sensor 3.
5. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 2 ohms between the Intake Air Temperature sensor 3 low reference circuit terminal 2 and ground.
• If 2 ohms or greater
1. Ignition OFF, disconnect the X3 harness connector at the K20 Engine Control Module.
2. Test for less than 2 ohms in the low reference circuit end to end.
• If 2 ohms or greater, repair the open or high resistance in the circuit.
• If less than 2 ohms replace the K20 Engine Control Module.
• If less than 2 ohms
6. Test for 4.8-5.2 V between the signal circuit terminal B and ground.
• If less than 4.8 V
1. Ignition OFF, disconnect the X3 harness connector at the K20 Engine Control Module.
2. Test for infinite resistance between the signal circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K20 Engine Control Module.
• If greater than 5.2 V
Note: If the signal circuit is shorted to a voltage the engine control module or the sensor may be damaged.
1. Ignition OFF, disconnect the X3 harness connector at the K20 Engine Control Module, ignition ON.
2. Test for less than 1 V between the signal circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the K20 Engine Control Module.
• If between 4.8-5.2 V
7. If all circuits test normal, test or replace the appropriate temperature sensor.
Component Testing
* Test the appropriate temperature sensor by varying the sensor temperature while monitoring the air temperature with a thermometer. Compare the readings with the appropriate scan tool parameter. The values should be within 5%.
• If not within the specified range, replace the appropriate sensor.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Charge Air Temperature Sensor Replacement (Turbocharger) Charge Air Temperature Sensor Replacement (Turbocharger)Charge Air Temperature Sensor Replacement (Outlet Pipe) Charge Air Temperature Sensor Replacement (Outlet Pipe) (Turbocharger) for Intake Air Temperature Sensor 3; Charge Air Cooler Inlet Temperature Sensor Replacement.
* Charge Air Temperature Sensor Replacement (Turbocharger) Charge Air Temperature Sensor Replacement (Turbocharger)Charge Air Temperature Sensor Replacement (Outlet Pipe) Charge Air Temperature Sensor Replacement (Outlet Pipe) (Charge Air Outlet Duct) for Charge Air Cooler Temperature Sensor; Charge Air Cooler Outlet Temperature Sensor Replacement
* Control Module References Control Module References for Engine Control Module replacement, programming, and setup