Astra J
DTC P0403, P0489, or P0490Diagnostic Instructions
DTC DescriptorsDTC P0403 04: Exhaust Gas Recirculation (EGR) Control Circuit OpenDTC P0489 02: Exhaust Gas Recirculation (EGR) Motor Control Circuit Short to Ground DTC P0489 12: Exhaust Gas Recirculation (EGR) Motor Control Circuit Low Input DTC P0490 01: Exhaust Gas Recirculation (EGR) Motor Control Circuit Short to Battery DTC P0490 11: Exhaust Gas Recirculation (EGR) Motor Control Circuit High Input Diagnostic Fault Information
Circuit/System DescriptionThe exhaust gas recirculation (EGR) valve is controlled by the engine control module (ECM) through the EGR solenoid. A reference voltage is supplied to the EGR valve solenoid. The ECM controls the solenoid by grounding the control circuit. Conditions for Running the DTC
Conditions for Setting the DTCP0403The ECM detects an open circuit when the EGR is commanded ON. P0489The ECM detects a short to ground when the EGR is commanded ON. P0490The ECM detects a short to voltage when the EGR is commanded ON. Action Taken When the DTC SetsDTCs P0403, P0489 and P0490 are Type B DTCs. Conditions for Clearing the DTCDTCs P0403, P0489 and P0490 are Type B DTCs. Reference InformationSchematic ReferenceConnector End View ReferenceElectrical Information ReferenceDTC Type ReferencePowertrain Diagnostic Trouble Code (DTC) Type Definitions Scan Tool ReferenceControl Module References for scan tool information Circuit/System Verification
If any other DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis. Circuit/System Testing
If less than the specified range, test the low reference circuit for a short to ground.
If greater than the specified range, test the low reference circuit for an open/high resistance. If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the DTC resets, replace the K20 Engine Control Module. Repair InstructionsPerform the Diagnostic Repair Verification after completing the diagnostic procedure.
|
|||||||||||||||||||||||||||||||