TEST ACTION APPLICABILITY
8 Turn the ignition off.
Disconnect the EGR Solenoid harness connector.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the 5 Volt Supply circuit from the EGR Solenoid harness
connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
All
Yes → Go To 9
No → Repair the open in the 5 Volt Supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
9 NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
10 NOTE: The engine will run rough and possibly stall in the following test.
Feather the accelerator pedal to keep the engine from stalling.
Start the engine.
With the DRBIIIt, enter Engine System Test and then EGR System Test. Push the
4=VARIABLE function.
Monitor the EGR voltage while slowly pushing the up arrow.
Is the voltage change smooth?
All
Yes → Refer to the INTERMITTENT CONDITION symptom in the
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Replace the EGR Solenoid Assembly.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
155
DRIVEABILITY - NGC
P0405 - EGR POSITION SENSOR LOW — Continued
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