Chrysler 300M 2002 Service Manual page 2579

DRIVEABILITY - NGC
P0401 - EGR SYSTEM PERFORMANCE —
TEST
3 Turn the ignition off.
Disconnect the EGR Solenoid Assembly harness connector.
Start engine. Attempt to allow the engine to idle.
Does the engine run rough or stall?
Yes → Inspect the EGR tube assembly. If OK, replace the EGR valve.
→ Go To 4
No
4 Inspect the EGR Assembly for the following.
Gasket(s) for leaking
Damage and/or holes in the EGR tube(s)
Carbon build up on or near the EGR pintle and passage ways.
Obstruction in the EGR tubes
Were any problem found?
Yes → Repair or replace the EGR Assembly as necessary.
→ Go To 5
No
5 Turn the ignition off.
Disconnect the EGR Solenoid harness connector.
Turn the ignition on.
Measure the voltage on the EGR Solenoid Control circuit in the EGR Solenoid
connector.
Is the voltage above 1.0 volt?
Yes → Repair the short to voltage in the EGR solenoid control circuit.
→ Go To 6
No
6 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
7 Turn the ignition on.
Turn all accessories off.
Disconnect the EGR Solenoid harness connector.
Using a 12-volt Test Light, jumper across the EGR Solenoid harness connector.
With the DRB, actuate the EGR solenoid.
Does the 12-volt test light flash on and off?
Yes → Inspect the tube(s) for obstructions and damage, repair as neces-
→ Go To 8
No
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.
sary. If OK, replace the EGR Solenoid Assembly.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Continued
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APPLICABILITY
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