Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1435
8.
ENGINE CONTROL MODULE (ECM)
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Oxygen 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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P2244-O2 SENSOR 1/1 REFERENCE VOLTAGE PERFORMANCE
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 and the O2 1/1 Sensor at operating temperature.
•
Set Condition:
The ECM detects an implausible voltage on the (K41) O2 1/1 Reference Signal.
Possible Causes
INTERMITTENT DTC
(K41) O2 1/1 REFERENCE SIGNAL CIRCUIT SHORTED TO VOLTAGE
(K41) O2 1/1 REFERENCE SIGNAL CIRCUIT SHORTED TO GROUND
(K41) O2 1/1 REFERENCE SIGNAL CIRCUIT SHORTED TO THE (K343) FUSED ASD RELAY OUTPUT 2
CIRCUIT
(K41) O2 1/1 REFERENCE SIGNAL CIRCUIT SHORTED TO THE (K99) O2 1/1 HEATER CONTROL CIRCUIT
(K41) O2 1/1 REFERENCE SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
OXYGEN 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).
Start the engine.
Allow the engine to reach normal operating temperature.
Monitor the scan tool for at least two minutes.
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.
(K41) O2 1/1 REFERENCE SIGNAL CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the Oxygen Sensor connector.
Disconnect the Engine Control Module (ECM) connector.
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 (K41) O2 1/1 Reference Signal circuit in the
Oxygen Sensor connector.
Is there any voltage present?
Yes
>> Repair the (K41) O2 1/1 Reference Signal circuit for a short
to voltage.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
No
>> Go to 3
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3.
(K41) O2 1/1 REFERENCE SIGNAL CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Measure the resistance between ground and the (K41) O2 1/1 Refer-
ence Signal circuit in the Oxygen Sensor connector.
Is the resistance above 1000.0 ohms?
Yes
>> Go to 4
No
>> Repair the (K41) O2 1/1 Reference Signal circuit for a short
to ground.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
4.
(K41) O2 1/1 REFERENCE SIGNAL CIRCUIT SHORTED TO THE (K343) FUSED ASD RELAY OUTPUT 2
CIRCUIT
Measure the resistance between the (K41) O2 1/1 Reference Signal cir-
cuit and the (K343) Fused ASD Relay Output 2 circuit in the Oxygen
Sensor connector.
Is the resistance above 1000.0 ohms?
Yes
>> Go to 5
No
>> Repair the (K41) O2 1/1 Reference Signal circuit for a short
to the (K343) Fused ASD Relay Output 2 circuit.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
5.
(K41) O2 1/1 REFERENCE SIGNAL CIRCUIT SHORTED TO THE (K99) O2 1/1 HEATER CONTROL
CIRCUIT
Measure the resistance between the (K41) O2 1/1 Reference Signal cir-
cuit and the (K99) O2 1/1 Heater Control circuit in the Oxygen Sensor
connector.
Is the resistance above 1000.0 ohms?
Yes
>> Go to 6
No
>> Repair the (K41) O2 1/1 Reference Signal circuit for a short
to the (K99) O2 1/1 Heater Control circuit.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
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