Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1386
9.
ENGINE CONTROL MODULE (ECM)
Turn the ignition off.
Inspect the (F856) Accelerator Pedal Position Sensor No. 2 5 Volt Supply circuit between the Accelerator Pedal
Position Sensor and the ECM.
Inspect the (F858) Exhaust Gas Pressure Sensor 5 Volt Supply circuit between the Exhaust Gas Pressure Sensor
and the ECM.
Inspect the (K668) Inlet Air Pressure Sensor 5 Volt Supply circuit between the Inlet Air Pressure Sensor and the
ECM.
Inspect the (F851) Oil Pressure Sensor 5 Volt Supply circuit between the Oil Pressure Sensor and the ECM.
Inspect the (K313) EGR Airflow Control Valve Supply circuit between the EGR Airflow Control Valve and the ECM.
Inspect the (K354) Exhaust Differential Pressure Sensor 5 Volt Supply circuit between the Exhaust Differential Pres-
sure Sensor and the ECM.
Look for any chafed, pierced, pinched, or partially broken wires.
Look for broken, bent, pushed out or corroded terminals.
Refer to any Technical Service Bulletins that may apply.
Were any problems found?
Yes
>> Repair as necessary.
Perform the ECM VERIFICATION TEST. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
No
>> Replace and program the Engine Control Module in accordance with the Service Information.
Perform the ECM VERIFICATION TEST. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
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ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
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P0653-SENSOR REFERENCE VOLTAGE 2 TOO HIGH
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 ECM detects a short to voltage on the Sensor Supply #2 circuit for 0.10 second.
Possible Causes
INTERMITTENT CONDITION
(F856) ACCELERATOR PEDAL POSITION SENSOR NO. 2 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
(F858) EXHAUST GAS PRESSURE SENSOR 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
(K354) EXHAUST DIFFERENTIAL PRESSURE SENSOR 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
(K668) INLET AIR PRESSURE SENSOR 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
(F851) OIL PRESSURE SENSOR 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
(K313) EGR AIRFLOW CONTROL VALVE SUPPLY CIRCUIT SHORTED TO VOLTAGE
(K313) EGR AIRFLOW CONTROL VALVE SUPPLY CIRCUIT SHORTED TO THE (K314) EGR AIRFLOW
CONTROL VALVE MOTOR (+) CIRCUIT
(K313) EGR AIRFLOW CONTROL VALVE SUPPLY CIRCUIT SHORTED TO THE (K315) EGR AIRFLOW
CONTROL VALVE MOTOR (-) CIRCUIT
ENGINE CONTROL MODULE (ECM)
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Theory of Operation
The ECM contains 3 internal 5–Volt Sensor Supply sources. Each 5–Volt Supply source is split into parallel circuits
to provide 5 volts to multiple sensors. Sensor Supply 3 provides 5 volts to the Inlet Pressure Sensor, Exhaust Gas
Pressure Sensor, Oil Pressure Sensor, EGR Airflow Control Servo Motor Position Sensor, and the Accelerator Pedal
Position Sensor #2.
Diagnostic Test
1.
CHECK FOR ACTIVE DTC
Turn the ignition on.
With the scan tool, erase ECM DTCs.
Turn the ignition off for 10 seconds.
Turn the ignition on.
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)
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2.
(F856) ACCELERATOR PEDAL POSITION SENSOR NO. 2 5 VOLT SUPPLY CIRCUIT SHORTED TO
VOLTAGE
Turn the ignition off.
Disconnect the Accelerator Pedal Position Sensor harness connector.
Disconnect the ECM harness connectors.
Remove the ASD Relay from the IPM.
Connect a jumper wire between cavity 30 and cavity 87 of the ASD
Relay connector.
Turn the ignition on.
Measure the voltage of the (F856) Accelerator Pedal Position Sensor
No. 2 5 Volt Supply circuit.
Is there any voltage present?
Yes
>> Repair the (F856) Accelerator Pedal Position Sensor No. 2
5 Volt Supply circuit for a short to voltage.
Perform the ECM VERIFICATION TEST. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
No
>> Go To 3
3.
(F858) EXHAUST GAS PRESSURE SENSOR 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the Exhaust Gas Pressure Sensor harness connector.
Turn the ignition on.
Measure the voltage of the (F858) Exhaust Gas Pressure Sensor 5 Volt
Supply circuit.
Is there any voltage present?
Yes
>> Repair the (F858) Exhaust Gas Pressure Sensor 5 Volt
Supply circuit for a short to voltage.
Perform the ECM VERIFICATION TEST. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
No
>> Go To 4
4.
(K354) EXHAUST DIFFERENTIAL PRESSURE SENSOR 5 VOLT SUPPLY CIRCUIT SHORTED TO
VOLTAGE
Turn the ignition off.
Disconnect the Exhaust Differential Pressure Sensor harness connector.
Turn the ignition on.
Measure the voltage of the (K354) Exhaust Differential Pressure Sensor
5 Volt Supply circuit.
Is there any voltage present?
Yes
>> Repair the (K354) Exhaust Differential Pressure Sensor 5
Volt Supply circuit for a short to voltage.
Perform the ECM VERIFICATION TEST. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
No
>> Go To 5
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