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CIRCUIT DESCRIPTION The powertrain control module (PCM) monitors the
exhaust gas recirculation (EGR) valve pintle position input to ensure that the valve responds properly to commands from the PCM. The linear
EGR valve is controlled by using an ignition positive driver and ground circuit within the PCM. The driver has the ability to detect an electrical malfunction in the ignition positive or ground circuit. If an electrical malfunction occurs, the driver signals the PCM to set this DTC.
CONDITIONS FOR RUNNING THE DTC ^ The engine is cranking or running.
^ System voltage between
9-18 volts.
CONDITIONS FOR SETTING THE DTC ^ The PCM detects an electrical malfunction in the EGR high control circuit or in the EGR low control circuit.
^ The condition is present for more than
20 seconds.
ACTION TAKEN WHEN THE DTC SETS ^ The control module illuminates the
malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
^ The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
CONDITIONS FOR CLEARING THE MIL/DTC ^ The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
^ A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
^ A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
^ Clear the MIL and the DTC with a scan tool.
TEST DESCRIPTION
View & Print OptionsSteps 1-3
View & Print OptionsSteps 4-15
The numbers below refer to the step numbers on the diagnostic table.
5. This step tests for an open in the ground circuit to the solenoid.
6. This step tests if voltage is constantly being applied to the solenoid.
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