Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1347
6.
ENGINE CONTROL MODULE (ECM)
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Exhaust Gas Pres-
sure Sensor and the Engine Control Module (ECM).
Look for any chafed, pierced, pinched, or partially broken wires.
Look for broken, bent, pushed out or corroded terminals.
Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
Look for the data to change or for the DTC to reset during the wiggle test.
Refer to any Technical Service Bulletins that may apply.
Were any problems found?
Yes
>> Repair as necessary.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
No
>> Replace the Engine Control Module (ECM) in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
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ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
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P0472-EXHAUST PRESSURE SENSOR 1 LOW
For a complete wiring diagram Refer to Section 8W
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ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
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•
When Monitored:
With the ignition on.
•
Set Condition:
The Exhaust Gas Pressure Sensor Signal circuit voltage is below 4.58 volts for 2.0 seconds.
Possible Causes
INTERMITTENT DTC
(F858) EXHAUST GAS PRESSURE SENSOR 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
(K35) EXHAUST GAS PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
(F858) EXHAUST GAS PRESSURE SENSOR 5 VOLT SUPPLY CIRCUIT SHORTED TO (K934) EXHAUST GAS
PRESSURE SENSOR GROUND CIRCUIT
(K35) EXHAUST GAS PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO (K934) EXHAUST GAS
PRESSURE SENSOR GROUND CIRCUIT
(F858) EXHAUST GAS PRESSURE SENSOR 5 VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE
(K35) EXHAUST GAS PRESSURE SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
EXHAUST GAS PRESSURE SENSOR
ENGINE CONTROL MODULE (ECM)
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.
DTC IS ACTIVE
Ignition on, engine not running.
With the scan tool, Clear DTCs in the Engine Control Module (ECM).
Monitor the scan tool for at least two minutes.
Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time.
Start the engine.
Allow the engine to reach normal operating temperature.
With the scan tool, select View DTCs.
Is the status Active for this DTC?
Yes
>> Go To 2
No
>> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
2.
(F858) EXHAUST GAS PRESSURE SENSOR 5 VOLT SUPPLY CIRCUIT VOLTAGE
Turn the ignition off.
Disconnect the Exhaust Gas Pressure Sensor connector.
Turn the ignition on.
Measure the voltage of the (F858) Exhaust Gas Pressure Sensor 5 Volt
Supply circuit in the Exhaust Gas Pressure Sensor connector.
Is the voltage above 4.5 volts?
Yes
>> Go to 6
No
>> Go to 3
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ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
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3.
(F858) EXHAUST GAS PRESSURE SENSOR 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Disconnect the Engine Control Module (ECM) connector.
Measure the resistance between ground and the (F858) Exhaust Gas
Pressure Sensor 5 Volt Supply circuit in the Exhaust Gas Pressure Sen-
sor connector.
Is the resistance above 1000.0 ohms?
Yes
>> Go to 4
No
>> Repair the (F858) Exhaust Gas Pressure Sensor 5 Volt
Supply circuit for a short to ground.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
4.
(F858) EXHAUST GAS PRESSURE SENSOR 5 VOLT SUPPLY CIRCUIT SHORTED TO (K934) EXHAUST
GAS PRESSURE SENSOR GROUND CIRCUIT
Measure the resistance between the (F858) Exhaust Gas Pressure
Sensor 5 Volt Supply circuit and the (K934) Exhaust Gas Pressure Sen-
sor Ground circuit in the Exhaust Gas Pressure Sensor connector.
Is the resistance above 1000.0 ohms?
Yes
>> Go to 5
No
>> Repair the (F858) Exhaust Gas Pressure Sensor 5 Volt
Supply circuit for a short to the (K934) Exhaust Gas Pres-
sure Sensor Ground circuit.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
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ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
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