Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1433
P2239-O2 SENSOR 1/1 PUMP CELL CURRENT CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W
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•
When Monitored:
With the ignition on and the O2 1/1 Sensor at operating temperature.
•
Set Condition:
The ECM detects a short to voltage on the (K43) O2 1/1 Positive Current Control circuit for 2.0 seconds.
Possible Causes
INTERMITTENT DTC
(K43) O2 1/1 POSITIVE CURRENT CONTROL CIRCUIT SHORTED TO VOLTAGE
(K43) O2 1/1 POSITIVE CURRENT CONTROL CIRCUIT SHORTED TO THE (K343) FUSED ASD RELAY
OUTPUT 2 CIRCUIT
(K43) O2 1/1 POSITIVE CURRENT CONTROL 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.
(K43) O2 1/1 POSITIVE CURRENT CONTROL 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 (K43) O2 1/1 Positive Current Control circuit
in the Oxygen Sensor connector.
Is there any voltage present?
Yes
>> Repair the (K43) O2 1/1 Positive Current Control 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.
(K43) O2 1/1 POSITIVE CURRENT CONTROL CIRCUIT SHORTED TO THE (K343) FUSED ASD RELAY
OUTPUT 2 CIRCUIT
Turn the ignition off.
Measure the resistance between the (K43) O2 1/1 Positive Current
Control circuit and the (K343) Fused ASD Relay Output 2 circuit in the
Oxygen Sensor connector.
Is the resistance above 10.0 ohms?
Yes
>> Go to 4
No
>> Repair the (K43) O2 1/1 Positive Current Control 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)
4.
(K43) O2 1/1 POSITIVE CURRENT CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
Measure the resistance of the (K43) O2 1/1 Positive Current Control cir-
cuit between the Oxygen Sensor connector and the Engine Control
Module (ECM) connector.
Is the resistance below 10.0 ohms?
Yes
>> Go to 5
No
>> Repair the (K43) 02 1/1 Positive Current Control circuit for
an open circuit or high resistance.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
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5.
OXYGEN SENSOR
Turn the ignition off.
Connect the Engine Control Module (ECM) connector.
Replace the Oxygen Sensor in accordance with the Service Information.
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 6
No
>> Test Complete.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
6.
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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