Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1088
•
When Monitored:
During engine cranking and with the engine running. Battery voltage greater than 10 volts.
•
Set Condition:
At least 5 seconds or 2.5 engine revolutions have elapsed with crankshaft position sensor signals present but
no camshaft position sensor signal. One Trip Fault. Three good trips to turn off the MIL.
Possible Causes
(F856) 5-VOLT SUPPLY CIRCUIT SHORTED TO BATTERY VOLTAGE
(F856) 5-VOLT SUPPLY CIRCUIT OPEN
(F856) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
(K44) CMP SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
(K44) CMP SIGNAL CIRCUIT OPEN
(K44) CMP SIGNAL CIRCUIT SHORTED GROUND
(K44) CMP SIGNAL SHORTED TO (F856) 5-VOLT SUPPLY CIRCUIT
(K900) SENSOR GROUND CIRCUIT OPEN
CAMSHAFT POSITION SENSOR
CRANKSHAFT POSITION SENSOR
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.
ACTIVE DTC
Crank the engine.
Ignition on, engine not running.
With a scan tool read the DTCs.
Is the DTC active at this time?
Yes
>> Go To 2
No
>> Go To 14
2.
(F856) 5-VOLT SUPPLY CIRCUIT
Turn the ignition off.
Disconnect the CMP Sensor harness connector.
Ignition on, engine not running.
Measure the voltage on the (F856) 5-volt Supply circuit in the CMP
Sensor harness connector.
Is the voltage between 4.5 and 5.2 volts?
Yes
>> Go To 3
No
>> Go To 10
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ENGINE ELECTRICAL DIAGNOSTICS
LX
3.
(K44) CMP SIGNAL CIRCUIT
Measure the voltage on the (K44) CMP Signal circuit in the CMP Sen-
sor harness connector.
Is the voltage between 4.5 and 5.0 volts?
Yes
>> Go To 4
No
>> Go To 7
4.
(K900) SENSOR GROUND CIRCUIT OPEN
Turn the ignition off.
Disconnect the PCM harness connectors.
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 of the (K900) Sensor ground circuit from the
CMP Sensor harness connector to the appropriate terminal of special
tool #8815.
Is the resistance below 5.0 ohms?
Yes
>> Go To 5
No
>> Repair the open in the (K900) Sensor ground circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
LX
ENGINE ELECTRICAL DIAGNOSTICS
9 - 377
5.
(K44) CMP SIGNAL SHORTED TO THE (F856) 5-VOLT SUPPLY CIRCUIT
Measure the resistance between the (K44) CMP Signal circuit and the
(F856) 5-volt Supply circuit in the CMP Sensor harness connector.
Is the resistance below 5.0 ohms?
Yes
>> Repair the short between the (K44) CMP Signal circuit and
the (F856) 5-volt Supply circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 6
6.
CAMSHAFT POSITION SENSOR
NOTE: Inspect the Camshaft sprocket for damage per the Service Information. If a problem is found repair
as necessary.
If there are no possible causes remaining, view repair.
Repair
Replace the Camshaft Position Sensor.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
7.
(K44) CMP SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
Turn the ignition off.
Disconnect the PCM harness connectors.
Ignition on, engine not running.
Measure the voltage on the (K44) CMP Signal circuit in the CMP Sen-
sor harness connector.
Is the voltage above 0 volts?
Yes
>> Repair the short to battery voltage in the (K44) CMP Signal
circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 8
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ENGINE ELECTRICAL DIAGNOSTICS
LX
8.
(K44) CMP 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 of the (K44) CMP Signal circuit from the CMP
Sensor harness connector to the appropriate terminal of special tool
#8815.
Is the resistance below 5.0 ohms?
Yes
>> Go To 9
No
>> Repair the open in the (K44) CMP Signal circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
9.
(K44) CMP SIGNAL CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (K44) CMP Signal cir-
cuit in the CMP Sensor harness connector.
Is the resistance below 100 ohms?
Yes
>> Repair the short to ground in the (K44) CMP Signal circuit
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 10
LX
ENGINE ELECTRICAL DIAGNOSTICS
9 - 379
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