P0335

Diagnostic Chart:

Diagnostic Chart (cont'd):

Wiring Diagram:

Circuit Description
The crankshaft position sensor is a Hall-effect type of sensor which monitors the crankshaft position and the speed. There are four teeth 90° apart on the front of the crankshaft sprocket which induce a pulse in the sensor which is transmitted to the PCM. There is a physical one to one correspondence between the pump cam and the crankshaft. This is a type A DTC.

Conditions for Setting the DTC

^ Eight consecutive crank pulses are missing.
^ An average of eight consecutive crank pulses are missing.

Action Taken When the DTC Sets
Backup fuel.

Conditions for Clearing the MIL/DTC

^ The PCM will turn the Malfunction Indicator Lamp (MIL) off after three consecutive trips without a fault condition.
^ A History DTC will clear after forty consecutive warm-up cycles during which the diagnostic does not fail (the coolant temperature has risen 5°C (40°F) from the start up coolant temperature and the engine coolant temperature exceeds 71°C (160°F) during that same ignition cycle).
^ Use of a Scan Tool will clear the DTC codes.

Diagnostic Aids
When the PCM is in backup fuel, long crank times, fast idle and poor performance conditions will exist. Check for a good connection at the crankshaft position sensor and at the PCM. Many intermittent problems are caused by poor electrical connections or wiring. When attempting to diagnose an intermittent problem, always begin by trying to reproduce the conditions under which the failure occurs. This usually involves raising the engine to a higher temperature or operating the engine near the RPM where the problem occurs. Since heat and vibration are often the cause of the intermittent, this may bring out the failure.

Test Description
The number(s) below refer to the Step number(s) on the Diagnostic Table.

2. This Step will determine if DTC P0335 is the result of a hard failure or an intermittent condition.
4. This Step checks the 5 volt reference circuit (the 5 volt reference may vary slightly).
5. This Step checks the ground circuit.