P0341

Code P0341, Cam/Crank Error:

Cam/Crank Sensor Circuit:

CIRCUIT DESCRIPTION
During cranking, the ignition control module monitors the crankshaft position sensor sync signal. The sync signal is used to determine the correct cylinder pair to spark first. After the sync signal has been processed by the ignition control module, it sends a fuel control reference pulse to the PCM. When the PCM receives this pulse it will command all six injectors to open for one priming shot of fuel in all cylinders. After the priming, the injectors are left "OFF" for the next six fuel control reference pulses from the ignition control module (two crankshaft revolutions). This allows each cylinder a chance to use the fuel from the priming shot. During this waiting period, a cam pulse will have been received by the PCM. Now the PCM begins to operate the injectors sequentially based on true camshaft position. With the engine running, the PCM monitors the cam and fuel control references pulses it receives and expects to see six fuel control pulses for each cam pulse.

DTC P0341 WILL SET WHEN:
^ Ratio of fuel control pulses to cam pulses does not equal 6:1.
^ Above condition for 10 occurrences during key cycle.

ACTION TAKEN (PCM will default to):
With a current DTC P0341 set, the MIL (Service Engine Soon) will be illuminated for the remainder of the key cycle.

TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. Determines if conditions necessary to set DTC P0341 exist.
2. If 5 volts are not present at PCM harness connector terminal "RB9", the camshaft position sensor may be interfacing with the magnet in the camshaft sprocket. Bumping the starter should correct this condition.
3. If a failure is induced in the fuel control reference circuit, the 5 volts on the circuit should change when the faulty wiring or connection is manipulated.

DIAGNOSTIC AIDS
DTC P0341 indicates an intermittent fault and may not set immediately or under all conditions. Customer comments of symptom experienced may help isolate the cause of the condition. A poor connection or fault in the camshaft position sensor CKTs 630, 633, 644 or 645 or a faulty camshaft position sensor may cause the PCM to reinitialize injector sequence when the fault occurs, causing a possible stumble or miss. A poor connection or fault in the fuel control CKT 430, crankshaft position sensor CKTs 573, 644 or 645, the 18X portion of the crankshaft position sensor or damaged vanes on the harmonic balancer interrupter rings will cause the PCM to stop pulsing the injectors when the fault occurs, causing an intermittent stumble or stall.