Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1093
6.
(K35) EGR SOLENOID CONTROL CIRCUIT SHORTED TO THE (K900) SENSOR GROUND CIRCUIT
Measure the resistance between the (K35) EGR Solenoid Control circuit and the (K900) Sensor ground circuit in the
EGR Solenoid connector.
Is the resistance below 5.0 ohms?
Yes
>> Repair the short between the (K900) Sensor ground circuit and the (K35) EGR Solenoid Control circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 7
7.
(K35) EGR SOLENOID CONTROL CIRCUIT OPEN
CAUTION: Do not probe the PCM harness connectors. Probing the
PCM harness connectors will damage the PCM terminals resulting
in poor terminal to pin connection. Install Miller Special Tool #8815
to perform diagnosis.
Measure the resistance of the (K35) EGR Solenoid Control 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 8
No
>> Repair the open in the (K35) EGR Solenoid Control circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)
8.
PCM
NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal
push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and
Ground circuits.
Were there any problems found?
Yes
>> Repair as necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
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ENGINE ELECTRICAL DIAGNOSTICS
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P0404-EGR POSITION SENSOR PERFORMANCE
For a complete wiring diagram Refer to Section 8W.
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ENGINE ELECTRICAL DIAGNOSTICS
9 - 397
•
When Monitored:
Engine running.
•
Set Condition:
The EGR flow or valve movement is not what is expected.
Possible Causes
(F856) 5-VOLT SUPPLY CIRCUIT
(K35) EGR SOLENOID CONTROL CIRCUIT
(K900) SENSOR GROUND CIRCUIT
EGR SOLENOID ASSEMBLY
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.
ACTIVE DTC
Ignition on, engine not running.
With a scan tool, read DTCs.
Is the DTC active at this time?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
2.
EGR POSITION VOLTAGE HIGH
NOTE: Diagnose all other EGR DTC(s) before continuing.
Disconnect the EGR Solenoid harness connector.
Turn the ignition on.
With a scan tool, read the EGR Position Sensor voltage.
Is the voltage between 4.7 volts to 5.0 volts?
Yes
>> Go To 3
No
>> Go To 4
3.
EGR POSITION VOLTAGE LOW
Turn the ignition off.
Using a jumper wire, jumper between (K34) EGR Sensor Signal circuit and (K900) Sensor Ground circuit in the
EGR Solenoid Sensor harness connector
Turn the ignition on.
With a scan tool, read the EGR Position Sensor voltage.
Is the voltage below 0.5 volt?
Yes
>> Replace EGR Valve Assembly in accordance with the Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 4
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ENGINE ELECTRICAL DIAGNOSTICS
LX
4.
(F856) 5-VOLT SUPPLY CIRCUIT HIGH RESISTANCE
Turn the ignition off.
Reconnect the EGR harness connector.
Disconnect the C2 PCM harness connector.
CAUTION: CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will
damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815
along with the #8815-1 to perform the diagnosis.
Using a voltmeter perform a voltage drop test. Backprobe the (F856) 5-volt Supply circuit at the EGR Solenoid
Sensor harness connector to the appropriate terminal of the special tool #8815. Ensure the voltmeter leads are
connected with the circuit’s correct polarity.
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
>> Go To 5
No
>> Repair the excessive resistance in the (F856) 5-volt Supply circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
5.
(K34) EGR SENSOR SIGNAL CIRCUIT HIGH RESISTANCE
Turn the ignition off.
Disconnect the C2 PCM harness connector.
CAUTION: CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will
damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815
along with the 8815-1 to perform the diagnosis.
Using a voltmeter perform a voltage drop test. Backprobe the (K34) EGR Sensor Signal circuit at the EGR Solenoid
Sensor harness connector to the appropriate terminal of the special tool #8815. Ensure the voltmeter leads are
connected with the circuit’s correct polarity.
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
>> Repair the short to ground in the (K34) EGR Sensor Signal circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 6
6.
(K900) SENSOR GROUND CIRCUIT HIGH RESISTANCE
Turn the ignition off.
Disconnect the C2 PCM harness connector.
CAUTION: CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will
damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815
along with the 8815-1 to perform the diagnosis.
Using a voltmeter perform a voltage drop test. Backprobe the (K900) Sensor Ground circuit at the EGR Solenoid
Sensor harness connector to the appropriate terminal of the special tool #8815. Ensure the voltmeter leads are
connected with the circuit’s correct polarity.
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ENGINE ELECTRICAL DIAGNOSTICS
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