Diagnostic Test

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 

1. Go to step  2).

No 

1. Refer to *CHECKING FOR AN INTERMITTENT CONDITION .

Fig 1: Checking O2 1/1 Negative Current Control Circuit Short To Voltage

Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the Oxygen Sensor harness connector.

Disconnect the Engine Control Module (ECM) harness connector.

Remove the ASD Relay from the PDC.

Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay Connector.

Turn the ignition on.

Measure the voltage of the (Z43) O2 1/1 Negative Current Control circuit in the Oxygen Sensor harness connector.

Is there any voltage present? 

Yes 

1. Repair the (Z43) O2 1/1 Negative Current Control circuit for a short to voltage.
2. Perform ECM VERIFICATION TEST .

No 

1. Go to step  3).

Fig 2: Checking O2 1/1 Negative Current Control Circuit Shorted To Fused ASD Relay Output 2 Circuit

Courtesy of CHRYSLER LLC

Turn the ignition off.

Remove the jumper wire and install the ASD relay

Measure the resistance between the (Z43) O2 1/1 Negative Current Control circuit and the (A15) Fused ASD Relay Output circuit in the Oxygen Sensor harness connector.

Is the resistance above 10.0 ohms? 

Yes 

1. Go to step  4).

No 

1. Repair the (Z43) O2 1/1 Negative Current Control circuit for a short to the (A15) Fused ASD Relay Output circuit.
2. Perform ECM VERIFICATION TEST .

Fig 3: Checking O2 Sensor 1/1 Negative Current Control Circuit

Courtesy of CHRYSLER LLC

Measure the resistance of the (Z43) O2 1/1 Negative Current Control circuit between the Oxygen Sensor harness connector and the Engine Control Module (ECM) harness connector.

Is the resistance below 10.0 ohms? 

Yes 

1. Go to step  5).

No 

1. Repair the circuit for an open circuit or high resistance.
2. Perform ECM VERIFICATION TEST .

Turn the ignition off.

Connect the Engine Control Module (ECM) harness 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 

1. Go to step  6).

No 

1. Test Complete.
2. Perform ECM VERIFICATION TEST .

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors 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 

1. Repair as necessary.
2. Perform ECM VERIFICATION TEST .

No 

1. Replace the Engine Control Module (ECM) in accordance with the Service Information.
2. Perform ECM VERIFICATION TEST .