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DRIVEABILITY - NGC
P0405 - EGR POSITION SENSOR LOW —
TEST
3
Turn the ignition off.
Disconnect the EGR Solenoid harness connector.
With the DRBIII , monitor the EGR Position Sensor voltage.
Turn the ignition on.
Is the voltage above 4.5 volts?
Yes → Replace the EGR Solenoid Assembly.
→ Go To 4
No
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 circuit in the EGR Position Sensor
→ 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
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Continued
154
APPLICABILITY
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