Dodge Caliber. Manual — part 956
P0401- EGR SYSTEM PERFORMANCE
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the engine running.
•
Set Condition:
The ECM detects and EGR flow problem for 8.0 seconds
Possible Causes
INTERMITTENT CONDITION
EGR VALVE
INTAKE OR EXHAUST SYSTEM PROBLEM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.
VERIFY ACTIVE DTC
With the scan tool, erase ECM DTC’s
Test drive the vehicle.
With the scan tool, read ECM DTC’s
Did this DTC set again?
Yes
>> Refer to symptom CHECKING THE EGR SYSTEM for further diagnosis.
No
>> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
PM
ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1111
P0402- EGR EXCESSIVE FLOW DETECTED
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the engine running.
•
Set Condition:
The ECM detects an EGR flow problem for 8.0 seconds
Possible Causes
INTERMITTENT CONDITION
EGR VALVE
INTAKE OR EXHAUST SYSTEM PROBLEM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.
VERIFY ACTIVE DTC
With the scan tool, erase ECM DTC’s
Test drive the vehicle.
With the scan tool, read ECM DTC’s
Did this DTC set again?
Yes
>> Refer to symptom CHECKING THE EGR SYSTEM for further diagnosis.
No
>> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
9 - 1112
ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
PM
P0403-EGR SOLENOID CIRCUIT OPEN
For a complete wiring diagram Refer to Section 8W
PM
ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1113
•
When Monitored:
With the ignition on and the EGR Solenoid command off.
•
Set Condition:
The ECM does not detect voltage on the (K35) EGR Solenoid Control circuit for 2.0 seconds.
Possible Causes
INTERMITTENT DTC
(K35) EGR SOLENOID CONTROL CIRCUIT SHORTED TO GROUND
(K35) EGR SOLENOID CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
(K344) FUSED MAIN RELAY OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE
EGR 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 Exhaust Gas Recirc Positioner.
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.
(K35) EGR SOLENOID CONTROL CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Disconnect the Valve Block Assembly harness connector.
Disconnect the Engine Control Module (ECM) connector.
Measure the resistance between ground and the (K35) EGR Solenoid
Control circuit in the Valve Block Assembly harness connector.
Is the resistance above 1000 ohms?
Yes
>> Go to 3
No
>> Repair the (K35) EGR Solenoid Control circuit for a short to
ground.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
9 - 1114
ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
PM
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