Chrysler 300M 2002 Service Manual page 2583

DRIVEABILITY - NGC
P0403 - EGR CONTROL CIRCUIT —
TEST
3 Turn the igntion off.
Disconnect the EGR Solenoid harness connector.
Disconnect the PCM harness connector.
Using a 12-volt Test Light connected to the EGR Solenoid ground circuit, probe the
EGR Solenoid Control circuit in the EGR Solenoid harness connector.
Does the test light illuminate?
Yes → Go To 4
→ Repair the open in the EGR Solenoid ground circuit.
No
4 Turn the ignition off.
Disconnect the EGR Solenoid harness connector.
Disconnect the PCM 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 5
No
5 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 EGR Solenoid Control circuit.
→ Go To 6
No
6 Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the EGR Solenoid harness connector.
Measure the resistance between the EGR Solenoid Control circuit and Sensor ground
circuit at the EGR Solenoid connector.
Is the resistance below 5.0 ohms?
Yes → Repair the short to Sensor ground in the EGR Solenoid Control
→ Go To 7
No
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Continued
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APPLICABILITY
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