Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1087

6.

CHECKING CAMSHAFT POSITION SENSOR SIGNAL WITH A LAB SCOPE

Install the CKP Sensor and connect the battery cable.

NOTE: An intermittent condition in the Cam Position Sensor can
cause the P0339 to set.
Install Miller Special Tools #8815 and #8815-1 to perform diagnosis.

Using a lab scope, probe the (K44) CMP Signal circuit in the appropri-
ate terminal of special tool #8815.

WARNING: When the engine is operating, do not stand in direct
line with the fan. Do not put your hands near the pulleys, belts, or
fan. Do not wear loose clothing. Failure to follow these instruc-
tions can result in personal injury or death.
Ignition on, engine not running.

Wiggle the related wire harness and lightly tap on the Cam Position
Sensor.

Observe the lab scope screen.

Start the engine.

Observe the lab scope screen.

Are there any irregular or missing signals?

Yes

>> Replace the Cam Position Sensor.

Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

No

>> Go To 7

7.

CRANKSHAFT POSITION SENSOR

If there are no possible causes remaining, view repair.

Repair

Replace the Crankshaft Position Sensor.

Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

8.

(K24) CKP SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE

Turn the ignition off.

Disconnect the PCM harness connectors.

Disconnect the CKP Sensor harness connector.

Ignition on, engine not running.

Measure the voltage on the (K24) CKP Signal circuit in the Sensor har-
ness connector.

Wiggle the related wire harness while taking this measurement.

Is the voltage above 1 volt?

Yes

>> Repair the short to battery voltage in the (K24) CKP Signal

circuit.

Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)

No

>> Go To 9

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ENGINE ELECTRICAL DIAGNOSTICS

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9.

(K24) CKP SIGNAL CIRCUIT OPEN

Turn the ignition off.

CAUTION: Do not probe the PCM harness connectors. Probing the
PCM harness connectors will damage the PCM terminals resulting
in poor terminal to pin connection. Install Miller Special Tool #8815
to perform diagnosis.
Measure the resistance in the (K24) CKP Signal circuit from the CKP
harness connector to the appropriate terminal of special tool #8815.

Wiggle the wire harness while taking this measurement.

Is the resistance below 1.0 ohm?

Yes

>> Go To 10

No

>> Repair the excessive resistance in the (K24) CKP Signal

circuit.

Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)

10.

(K24) CKP SIGNAL CIRCUIT SHORTED TO GROUND

Measure the resistance between ground and the (K24) CKP Signal cir-
cuit in the CKP Sensor harness connector.

Wiggle the related wire harness while monitoring the resistance value.

Does the resistance ever go below 100 ohms?

Yes

>> Repair the short to ground in the (K24) Signal circuit.

Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)

No

>> Go To 11

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ENGINE ELECTRICAL DIAGNOSTICS

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11.

(K24) CKP SIGNAL CIRCUIT SHORTED TO THE (F855) 5-VOLT SUPPLY CIRCUIT

Measure the resistance between the (F855) 5-volt Supply circuit and
the (K24) CKP Signal circuit in the CKP harness connector.

Wiggle the related wire harness while taking this measurement.

Is the resistance below 5.0 ohms?

Yes

>> Repair the short between the (F855) 5-volt Supply circuit

and the (K24) CKP Signal circuit.

Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)

No

>> Go To 12

12.

PCM

NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal
push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and
Ground circuits.

Were there any problems found?

Yes

>> Repair as necessary.

Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

No

>> Replace and program the Powertrain Control Module per Service Information.

Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

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ENGINE ELECTRICAL DIAGNOSTICS

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P0340-CAMSHAFT POSITION SENSOR CIRCUIT

For a complete wiring diagram Refer to Section 8W.

LX

ENGINE ELECTRICAL DIAGNOSTICS

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