Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC P02E7: Diesel Intake Air (IA) Flow Position Sensor PerformanceDiagnostic Fault Information
Circuit | Short to Ground | High Resistance | Open | Short to Voltage |
|---|---|---|---|---|
IA Flow Valve 5-Volt Reference Voltage | P0642 | P02E9 | P02E8 | P0336, P0643 |
IA Flow Valve Sensor Signal | P02E8 | P02E7 | P02E8 | P02E9 |
IA Flow Valve Low Reference | -- | P02E7 | P02E9 | -- |
IA Flow Valve Motor Control 1 | P02E0 | -- | P02E0 | P02E0 |
IA Flow Valve Motor Control 2 | P02E0 | -- | P02E0 | P02E0 |
Circuit/System Description
The intake air (IA) valve is a normally open valve and is only operated during a DPF regeneration. The position of the IA valve is controlled by the engine control module (ECM). The IA valve system uses a position sensor located within the valve assembly to monitor the position of the valve. The position sensor has the following circuits:
| • | 5-volt reference circuit |
| • | Low reference circuit |
| • | Signal circuit |
The IA valve uses a motor to move the valve to a closed position and spring tension returns it to the open position. The motor has the following circuits:
| • | Motor control 1 circuit |
| • | Motor control 2 circuit |
Conditions for Running the DTC
| • | DTCs P02E0, P02E8, P02E9, P0642 or P0643 are not set. |
| • | DTC P02E7 runs continuously while the IA valve is actively being controlled. |
Conditions for Setting the DTC
The difference between the desired IA Valve position and the actual IA Valve position is more than 3 percent for 10 seconds.
Action Taken When the DTC Sets
| • | DTC P02E7 is a Type B DTC. |
| • | Diesel particulate filter (DPF) regeneration is inhibited. |
Conditions for Clearing the DTC
DTC P02E7 is a Type B DTC.
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Command the IA valve from 100 percent to 0 percent. The IAF Valve Commanded Position and the IAF Valve Position parameter should match.
- After the engine has been running, turn OFF the ignition. Observe the IA Valve Position parameter fluctuates between 100 percent and 0 percent several times.
- 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.
Circuit/System Testing
Measure the following circuits for high resistance:
| • | Low reference circuit terminal C |
| • | Signal circuit terminal E |
| ⇒ | If high resistance is found, repair the affected circuit. |
| ⇒ | If no resistance is found, replace the IA valve. |
Repair Instructions
| • | Refer to Control Module References for ECM replacement, setup and programming. |
Repair Verification
- Install any components or connectors that have been removed or replaced during diagnosis.
- Perform any adjustment, programming, or setup procedures that are required when a component or module is removed or replaced.
- Clear the DTCs.
- Turn OFF the ignition for 90 seconds.
- Duplicate the Conditions for Running the DTC and use the Freeze Frame/Failure Records, if applicable, in order to verify the DTC does not reset. If the DTC resets or another DTC is present, refer to Diagnostic Trouble Code (DTC) List - Vehicle and perform the appropriate diagnostic procedure.
- Perform the Diesel Particulate Filter (DPF) Service Regeneration.
