Dodge Caliber. Manual — part 1025
P2427-EGR EGR COOLING VALVE CONTROL CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W
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ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1387
•
When Monitored:
With the ignition on and the ECM EGR Cooler Bypass command on.
•
Set Condition:
The ECM detects excessive current on the EGR Cooler Bypass Control circuit.
Possible Causes
INTERMITTENT CONDITION
(K53) EGR COOLER BYPASS CONTROL CIRCUIT SHORTED TO VOLTAGE
VALVE BLOCK ASSEMBLY
ENGINE CONTROL MODULE
Diagnostic Test
1.
CHECK FOR ACTIVE DTC
NOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions
under which the DTC was set. Some of these conditions are displayed on the scan tool at the same time the
DTC is displayed.
NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may
assist when checking for an active DTC.
Turn the ignition on.
With the scan tool, erase ECM DTCs.
Perform several ignition cycles, turning the ignition off for at least 10 seconds between each ignition cycle.
Monitor the scan tool for ECM DTCs.
Did this DTC set again?
Yes
>> Go To 2
No
>> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
2.
CHECKING FOR OTHER DTCS
NOTE: An open Main Relay power supply to the ECM will cause multiple DTC’s including this DTC to set.
NOTE: Check the ECM for other DTC’s. If other DTC’s are set with this DTC refer to the symptom list and
perform the CHECKING THE ECM POWER AND GROUND CIRCUITS test before continuing.
If the ECM power and ground circuits are functioning properly continue with this test.
Yes
>> Go To 3
9 - 1388
ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
PM
3.
(K53) EGR COOLING VALVE CONTROL CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the Valve Block Assembly harness connector.
Disconnect the 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 (K53) EGR Cooler Bypass Control circuit at
the Valve Block Assembly harness connector.
Is the voltage above 1.0 volt?
Yes
>> Repair the (K53) EGR Cooler Bypass Control circuit for a
short to voltage.
Perform the ECM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).
No
>> Replace the Valve Block Assembly in accordance with the
Service Information.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
PM
ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1389
P2500-GENERATOR LAMP/L-TERMINAL CONTROL CIRCUIT LOW
For a complete wiring diagram Refer to Section 8W
9 - 1390
ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
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