Chrysler 300M 2002 Service Manual page 2590

P0405 - EGR POSITION SENSOR LOW —
TEST
4 Turn the ignition off.
Disconnect the EGR Position harness connector.
Disconnect the PCM harness connector.
Measure the resistance between ground and the EGR Position Sensor Signal circuit
at the EGR Position harness connector.
Is the resistance below 100 ohms?
Yes → Repair the short to ground in the EGR Position Sensor Signal
→ Go To 5
No
5 Turn the ignition off.
Disconnect the EGR Position harness connector.
Disconnect the PCM harness connector.
Measure the resistance between the EGR Position Sensor Signal circuit and the
Sensor ground circuit in the EGR Position harness connector.
Is the resistance below 100 ohms?
Yes → Repair the short to Sensor ground in the EGR Position Sensor
→ 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 off.
Disconnect the EGR Solenoid harness connector.
Disconnect the PCM harness connector.
Measure the resistance between ground and the 5 Volt Supply circuit at the EGR
Solenoid harness connector.
Is the resistance below 100 ohms?
Yes → Repair the short to ground in the 5 Volt Supply circuit.
→ Go To 8
No
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?
Yes → Go To 9
→ Repair the open in the 5 Volt Supply circuit.
No
ACTION
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Signal circuit.
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.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - NGC
Continued
161
APPLICABILITY
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