Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1094
WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands
near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in
personal injury or death.
Start the engine and allow it to reach normal operating temperature.
Monitor the voltmeter.
Is the voltage below 0.5 volts?
Yes
>>
NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal
push out. Repair as necessary.
Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Repair the open in the (K900) Sensor ground circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
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ENGINE ELECTRICAL DIAGNOSTICS
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P0405-EGR POSITION SENSOR CIRCUIT LOW
For a complete wiring diagram Refer to Section 8W.
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ENGINE ELECTRICAL DIAGNOSTICS
9 - 401
•
When Monitored:
With the ignition on. Battery voltage above 10.0 volts.
•
Set Condition:
EGR Position Sensor Signal is less than 0.1 of a volt. One trip Fault.
Possible Causes
(F856) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
(F856) 5-VOLT SUPPLY CIRCUIT OPEN
(K34) EGR POSITION SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
(K34) EGR POSITION SENSOR SIGNAL CIRCUIT SHORTED TO THE (K900) SENSOR GROUND CIRCUIT
EGR POSITION SENSOR
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.
EGR POSITION SENSOR BELOW 0.2 OF A VOLT
Ignition on, engine not running.
With a scan tool, read the EGR Position Sensor voltage.
Is the voltage below 0.2 of a volt?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
2.
(F856) 5-VOLT SUPPLY CIRCUIT
Turn the ignition off.
Disconnect the EGR Solenoid harness connector.
Ignition on, engine not running.
Measure the voltage of the (F856) 5-volt Supply circuit in the EGR
Solenoid harness connector.
Is the voltage between 4.5 to 5.2 volts?
Yes
>> Go To 3
No
>> Go To 6
3.
EGR POSITION
With the scan tool, monitor the EGR Position Sensor voltage.
Is the voltage above 4.5 volts?
Yes
>> Replace the EGR Solenoid Assembly.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 4
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ENGINE ELECTRICAL DIAGNOSTICS
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4.
(K34) EGR POSITION SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Disconnect the PCM harness connector.
Measure the resistance between ground and the (K34) EGR Position
Sensor Signal circuit in the EGR Solenoid harness connector.
Is the resistance below 100 ohms?
Yes
>> Repair the short to ground circuit in the (K34) EGR Position
Sensor Signal circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 5
5.
(K34) EGR SENSOR SIGNAL CIRCUIT SHORTED TO THE (K900) SENSOR GROUND CIRCUIT
Measure the resistance between the (K34) EGR Position Sensor Signal
circuit and (K900) Sensor ground circuit in the EGR Solenoid harness
connector.
Is the resistance below 100 ohms?
Yes
>> Repair the short between the (K900) Sensor ground and
the (K34) EGR Position Sensor Signal circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 8
6.
(F856) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Disconnect the PCM harness connectors.
Measure the resistance between ground and the (F856) 5-volt Supply
circuit in the EGR Solenoid harness connector.
Is the resistance below 100 ohms?
Yes
>> Repair the short to ground in the (F856) 5-volt Supply cir-
cuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 7
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ENGINE ELECTRICAL DIAGNOSTICS
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