Dodge Caliber. Manual — part 1020
P2142-EGR AIRFLOW THROTTLE CONTROL CIRCUIT A HIGH
For a complete wiring diagram Refer to Section 8W
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ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1367
•
When Monitored:
With the engine running and the EGR Airflow Control Valve Motor command on.
•
Set Condition:
The (K601) EGR Airflow Control Valve Motor (+) circuit is shorted to voltage for 0.2 second.
Possible Causes
INTERMITTENT DTC
(K601) EGR AIRFLOW CONTROL VALVE CONTROL CIRCUIT SHORTED TO VOLTAGE
(K604) EGR AIRFLOW CONTROL VALVE SIGNAL CIRCUIT SHORTED TO VOLTAGE
(K601) EGR AIRFLOW CONTROL VALVE CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
(K604) EGR AIRFLOW CONTROL VALVE SIGNAL 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.
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.
(K601) EGR AIRFLOW CONTROL VALVE CONTROL CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the EGR Airflow Control Valve harness connector.
Disconnect the Engine Control Module (ECM) harness connector.
Remove the Main Relay.
Connect a jumper wire between cavity B7 and cavity B9 of the Main
Relay Connector.
Turn the ignition on.
Measure the voltage of the (K601) EGR Airflow Control Valve Control
circuit in the EGR Airflow Control Valve harness connector.
Is there any voltage present?
Yes
>> Repair the (K601) EGR Airflow Control Valve 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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ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
PM
3.
(K604) EGR AIRFLOW CONTROL VALVE SIGNAL CIRCUIT SHORTED TO VOLTAGE
Measure the voltage of the (K604) EGR Airflow Control Valve Signal cir-
cuit in the EGR Airflow Control Valve harness connector.
Is there any voltage present?
Yes
>> Repair the (K604) EGR Airflow Control Valve Signal circuit
for a short to voltage.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
No
>> Go to 4
4.
(K601) EGR AIRFLOW CONTROL VALVE CONTROL OPEN OR HIGH RESISTANCE
Turn the ignition off.
Measure the resistance of the (K601) EGR Airflow Control Valve Control
circuit between the EGR Airflow Control Valve harness connector and
the Engine Control Module (ECM) harness connector.
Is the resistance below 10.0 ohms?
Yes
>> Go to 5
No
>> Repair the (K601) EGR Airflow Control Valve Control circuit
for an open circuit or high resistance.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
PM
ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1369
5.
(K604) EGR AIRFLOW CONTROL VALVE SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
Measure the resistance of the (K604) EGR Airflow Control Valve Signal
circuit between the EGR Airflow Control Valve harness connector and
the Engine Control Module (ECM) harness connector.
Is the resistance below 10.0 ohms?
Yes
>> Go to 6
No
>> Repair the (K604) EGR Airflow Control Valve Signal circuit
for an open circuit or high resistance.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
6.
EGR AIRFLOW CONTROL VALVE
Turn the ignition off.
Connect the Engine Control Module (ECM) harness 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 7
No
>> Test complete.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
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ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
PM
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