Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1352

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When Monitored:
With the engine running and the EGR Airflow Control Valve Motor command off.

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Set Condition:
The Engine Control Module (ECM) detects an open (K314) EGR Airflow Control Valve Motor (+) circuit for 0.5
second.

Possible Causes

INTERMITTENT DTC

(K314) EGR AIRFLOW CONTROL VALVE MOTOR (+) CIRCUIT OPEN OR HIGH RESISTANCE

(K315) EGR AIRFLOW CONTROL VALVE MOTOR (-) CIRCUIT OPEN OR HIGH RESISTANCE

EGR AIRFLOW CONTROL VALVE

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).

With the scan tool, actuate the EGR Airflow Control Valve at 100%.

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)

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2.

(K314) EGR AIRFLOW CONTROL VALVE MOTOR (+) CIRCUIT OPEN OR HIGH RESISTANCE

Turn the ignition off.

Disconnect the EGR Airflow Control Valve connector.

Disconnect the Engine Control Module (ECM) connector.

Measure the resistance of the (K314) EGR Airflow Control Valve Motor
(+) circuit between the EGR Airflow Control Valve connector and the
Engine Control Module (ECM) connector.

Is the resistance below 10.0 ohms?

Yes

>> Go to 3

No

>> Repair the (K314) EGR Airflow Control Valve Motor (+) cir-

cuit for an open circuit or high resistance.

Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)

3.

(K315) EGR AIRFLOW CONTROL VALVE MOTOR (-) CIRCUIT OPEN OR HIGH RESISTANCE

Measure the resistance of the (K315) EGR Airflow Control Valve Motor
(-) circuit between the EGR Airflow Control Valve connector and the
Engine Control Module (ECM) connector.

Is the resistance below 10.0 ohms?

Yes

>> Go to 4

No

>> Repair the (K315) EGR Airflow Control Valve Motor (-) 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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ENGINE ELECTRICAL DIAGNOSTICS - DIESEL

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4.

EGR AIRFLOW CONTROL VALVE

Turn the ignition off.

Connect the Engine Control Module (ECM) connector.

Replace the EGR Airflow Control Valve in accordance with the Service Information.

Turn the ignition on.

With the scan tool, Clear DTCs in the Engine Control Module (ECM).

With the scan tool, actuate the EGR Airflow Control Valve.

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 5

No

>> Test complete.

Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

5.

ENGINE CONTROL MODULE (ECM)

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the EGR Airflow Control
Valve 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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P0488-EGR AIRFLOW THROTTLE CONTROL CIRCUIT PERFORMANCE

For a complete wiring diagram Refer to Section 8W

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ENGINE ELECTRICAL DIAGNOSTICS - DIESEL

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