Dodge Ram Truck 1500-2500-3500. Manual — part 1229

P0340-CAMSHAFT POSITION SENSOR CIRCUIT (CONTINUED)

For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS).

For a complete wiring diagram Refer to Section 8W.

•

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

(F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO BATTERY VOLTAGE

(F855) 5-VOLT SUPPLY CIRCUIT OPEN

(F855) 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 THE (F855) 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

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ENGINE - ELECTRICAL DIAGNOSTICS - SRT-10

DR/DH

P0340-CAMSHAFT POSITION SENSOR CIRCUIT (CONTINUED)

2.

(F855) 5-VOLT SUPPLY CIRCUIT

Turn the ignition off.

Disconnect the CMP Sensor harness connector.

Ignition on, engine not running.

Measure the voltage on the (F855) 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

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

DR/DH

ENGINE - ELECTRICAL DIAGNOSTICS - SRT-10

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P0340-CAMSHAFT POSITION SENSOR CIRCUIT (CONTINUED)

4.

(K900) SENSOR GROUND CIRCUIT OPEN

Turn the ignition off.

Disconnect the PCM harness connector.

Measure the resistance of the (K900) Sensor ground circuit from the
CMP Sensor harness connector to the PCM harness connector.

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)

5.

(K44) CMP SIGNAL SHORTED TO THE (F855) 5-VOLT SUPPLY CIRCUIT

Measure the resistance between the (K44) CMP Signal circuit and the
(F855) 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 (F855) 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)

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ENGINE - ELECTRICAL DIAGNOSTICS - SRT-10

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P0340-CAMSHAFT POSITION SENSOR CIRCUIT (CONTINUED)

7.

(K44) CMP SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE

Turn the ignition off.

Disconnect the PCM harness connector.

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 Sig-

nal circuit.

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

No

>> Go To 8

8.

(K44) CMP SIGNAL CIRCUIT OPEN

Turn the ignition off.

Measure the resistance of the (K44) CMP Signal circuit from the CMP
Sensor harness connector to the PCM harness connector.

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)

DR/DH

ENGINE - ELECTRICAL DIAGNOSTICS - SRT-10

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