P007D
DTC P007C or P007D
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 provide an overview of each diagnostic category.
DTC Descriptors
DTC P007C
- Charge Air Cooler (CAC) Temperature Sensor Circuit Low Voltage
DTC P007D
- Charge Air Cooler (CAC) Temperature Sensor Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The charge air cooler (CAC) temperature sensor is a variable resistor. The sensor is located in the CAC outlet duct before the throttle body assembly. Its signal is used by the ECM to measure the temperature of the intake air leaving the CAC. The engine control module (ECM) supplies 5 V to the signal circuit and a ground for the low reference circuit. The ECM continuously monitors the sensor signal for an excessively high or low voltage, or for a start-up signal that is not in correlation with the intake air temperature (IAT) sensor 3 start-up signal.
Conditions for Running the DTC
P007C or P007D
* The engine is running for longer than 10 s.
* The DTCs run continuously when the enabling condition is met.
Conditions for Setting the DTC
Note: The scan tool display range is between -40 and +199°C (-40 and +390°F).
P007C
The CAC temperature sensor signal is warmer than 250°C (482°F) for longer than 5 s. This is equal to or less than 0.03 V on the CAC temperature sensor signal circuit as measured by the ECM.
P007D
The CAC temperature sensor signal is colder than -53°C (-63°F) for longer than 5 s. This is equal to or greater than 4.8 V on the CAC temperature sensor signal circuit as measured by the ECM.
Action Taken When the DTC Sets
* DTCs P007C and P007D are Type A DTCs.
* The ECM commands reduced engine power.
* The driver information center (DIC) or indicator may display reduced engine power.
* Service Emission System message is displayed on the driver information center (DIC).
* Diesel particulate filter (DPF) regeneration is inhibited.
Conditions for Clearing the DTC
DTCs P007C and P007D are Type A DTCs.
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).
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.
* Ambient Air Temp.
* IAT Sensor 3 Sensor
* CAC Temperature Sensor
• If not within 15°C (27°F)
Refer to Circuit System Testing.
• If within 15°C (27°F)
3. Engine idling.
4. Verify the scan tool CAC Temperature Sensor parameter is between-39 to +198°C (-38 to +388°F).
• If not between -39 to +198°C (-38 to +388°F)
Refer to Circuit System Testing.
• If between -39 to +198°C (-38 to +388°F)
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. Test or replace the B193A Charge Air Cooler Temperature sensor.
Component Testing
* Test the B193A Charge Air Cooler Temperature sensor by varying the sensor temperature while monitoring the air temperature with a thermometer. Compare the readings with the scan tool CAC Temperature Sensor parameter. The values should be within 5%.
• If not within the specified range, replace the B193A Charge Air Cooler Temperature sensor (Charge Air Outlet Duct).
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Perform the scan tool Diesel Particulate Filter (DPF) Regeneration Enable Diesel Particulate Filter (DPF) Regeneration Enable procedure if the DPF Soot Mass is less than 30 g. If the scan tool DPF Soot Mass is 30 g or greater, perform the Diesel Particulate Filter (DPF) Service Regeneration Diesel Particulate Filter (DPF) Service Regeneration procedure.
* Perform the Reductant System Malfunction Warning Test Component Tests and General Diagnostics with a scan tool in order to clear the Service Emission System message, if illuminated.
• If the Service Emission System message does not turn OFF, a condition with the system still exists.
* 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 Sensor Replacement
* Control Module References Control Module References for engine control module replacement, programming, and setup