For a complete wiring diagram Refer to Section 8W.
The EGR valve has a position sensor and the EGR position rationality is designed to make sure that the valve moves freely within its operating range. Closed valve position reference check verifies that the valve is within its allowable upper and lower limits. The EGR position rationality test looks for a sustained error relative to commanded valve position.
Engine running.
The EGR flow or valve movement is not what is expected. A rationality error has been detected fro the EGR Close Position Performance. Two trip fault.
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Possible Causes
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(K34) EGR SENSOR SIGNAL CIRCUIT OPEN |
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(K34) EGR SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE |
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(K35) EGR SOLENOID CONTROL CIRCUIT SHORTED TO VOLTAGE |
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(K900) SENSOR GROUND CIRCUIT OPEN |
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EGR SOLENOID ASSEMBLY |
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PCM |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
NOTE: It may be necessary to drive the vehicle to meet the conditions to set this DTC, try to repeat the conditions in which the fault originally set by reviewing the Freeze Frame data.
CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.
NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.