Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1331
2.
TEST DRIVE
Turn the ignition on.
With the scan tool, erase the ECM DTCs.
Test drive the vehicle.
With the scan tool, read the ECM DTCs.
Does the scan tool display this DTC?
Yes
>> Go To 3
No
>> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
3.
CHECKING (K24) CRANKSHAFT POSITION SENSOR SIGNAL CIRCUIT
Turn the ignition off.
Disconnect the Crankshaft Position Sensor harness connector.
Turn the ignition on.
Measure the voltage of the (K24) CKP Sensor Signal circuit at the CKP
Sensor harness connector.
Select the appropriate voltage reading.
Voltage is above 5.4 volts.
Go To 4
Voltage is between 4.7 and 5.4 volts.
Go To 5
Voltage is below 4.7 volts.
Go To 12
4.
(K24) CRANKSHAFT POSITION SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE
Turn the ignition off.
Disconnect the ECM harness connectors.
Remove the ASD Relay.
Connect a jumper wire between cavity 30 and cavity 87 of the ASD
Relay connector.
Turn the ignition on.
Measure the voltage of the (K24) CKP Sensor Signal circuit at the CKP
Sensor harness connector.
Is the voltage below 1.0 volt?
Yes
>> Replace and program the Engine Control Module in accor-
dance with the Service Information.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
No
>> Repair the (K24) Crankshaft Position Sensor Signal circuit
for a short to voltage.
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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5.
CHECKING (K853) CRANKSHAFT POSITION SENSOR 5-VOLT SUPPLY CIRCUIT
Turn the ignition on.
Measure the voltage of the (K853) CKP Sensor 5-Volt Supply circuit at
the CKP Sensor harness connector.
Select the appropriate voltage reading.
Voltage is above 5.4 volts.
Repair the (K853) CKP 5-Volt Supply circuit for a short to
voltage.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
Voltage is between 4.7 and 5.4 volts.
Go To 6
Voltage is below 4.7 volts.
Go To 9
6.
(Z753) CRANKSHAFT POSITION SENSOR GROUND CIRCUIT OPEN
Turn the ignition off.
Disconnect the ECT Sensor harness connector.
Connect one end of a jumper wire to the ECT Sensor signal circuit in
the ECT Sensor harness connector.
Connect the other end of the jumper wire to the (Z753) CKP Sensor
Ground circuit in the Crankshaft Position Sensor harness connector.
Turn the ignition on.
With the scan tool in Engine, Sensors, read the Engine Coolant Temp
volts.
Is the voltage below 0.5 volt?
Yes
>> Go To 8
No
>> Go To 7
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ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1349
7.
(Z753) CRANKSHAFT POSITION SENSOR GROUND CIRCUIT OPEN
Turn the ignition off.
Disconnect the CKP Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance of the (Z753) CKP Sensor Ground circuit
between the CKP Sensor harness connector and the ECM harness con-
nector.
Is the resistance below 10.0 ohms?
Yes
>> Replace and program the ECM in accordance with the Ser-
vice Information.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
No
>> Repair the (Z753) CKP Sensor Ground circuit for an open.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
8.
DAMAGED CRANKSHAFT POSITION SENSOR OR CRANKSHAFT
Remove the CKP Sensor.
Inspect the CKP Sensor for conditions such as loose mounting screws, damage, or cracks.
Inspect the Crankshaft for conditions such as damage, debris or cracked teeth.
Is there any evidence of these conditions?
Yes
>> Repair as necessary.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
No
>> Replace the Crankshaft Position Sensor in accordance with the Service Information.
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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9.
(K853) CRANKSHAFT POSITION SENSOR 5-VOLT SUPPLY CIRCUIT OPEN
Disconnect the ECM harness connectors.
Measure the resistance of the (K853) CKP Sensor 5-Volt Supply circuit
between the ECM harness connector and the CKP Sensor harness con-
nector.
Is the resistance below 10.0 ohms?
Yes
>> Go To 10
No
>> Repair the (K853) CKP Sensor 5-Volt Supply circuit for an
open.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
10.
(K853) CRANKSHAFT POSITION SENSOR 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (K853) CKP Sensor
5-Volt Supply circuit at the CKP Sensor harness connector.
Is the resistance above 1000 ohms?
Yes
>> Go To 11
No
>> Repair the (K853) CKP Sensor 5-Volt Supply circuit for a
short to ground.
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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