Chrysler Concorde 2004 Service Manual page 820

DRIVEABILITY - NGC
P0401 - EGR SYSTEM PERFORMANCE —
TEST
8 Turn the ignition off.
Disconnect the EGR Solenoid harness connector.
Using a 12-volt test light connected to battery voltage, probe the EGR Solenoid
ground circuit in the EGR Solenoid harness connector.
Does the 12-volt test light illuminate brightly?
Yes → Go To 9
→ Repair the open in the EGR Solenoid ground circuit.
No
9 Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the EGR Solenoid harness connector.
Measure the resistance between ground and the EGR Solenoid Control circuit at the
EGR Solenoid harness connector.
Is the resistance below 100 ohms?
Yes → Repair the short to ground in the EGR Solenoid Control circuirt.
→ Go To 10
No
10 Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the EGR Solenoid 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 EGR Solenoid Control circuit from the EGR Solenoid
harness connector to the appropriate terminal of special tool # 8815.
Is the resistance below 5.0 ohms?
Yes → Go To 11
→ Repair the open in the EGR solenoid control circuit.
No
11 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.
Repair
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Continued
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APPLICABILITY
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