P0335

Diagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION
The crankshaft position sensor is a "Hall-effect" type sensor that monitors crankshaft position and speed. There are four teeth 90° apart on the front of the crankshaft sprocket that induce a pulse in the sensor which is transmitted to the Powertrain Control Module (PCM). There is a physical one to one correspondence between the pump cam and crankshaft. This is a type A DTC.

CONDITIONS FOR SETTING THE DTC
- RPM less than 300.
- 8 consecutive cam pulses missing for 8 #1 cylinder events.
or
- RPM greater than or equal to 300.
- 8 consecutive cam pulses missing for 32 #1 cylinder events.

ACTION TAKEN WHEN THE DTC SETS
Backup fuel.

CONDITIONS FOR CLEARING THE MIL/DTC
- The PCM will turn the MIL off after three consecutive trips without a fault condition.
- A History DTC will clear when forty consecutive warm-up cycles that the diagnostic does not fail (coolant temperature has risen 5°C (40°F) from start up coolant temperature and engine coolant temperature exceeds 71°C (160°F) that same ignition cycle.

DIAGNOSTIC AIDS
When PCM is in backup fuel, long crank times, fast idle and poor performance conditions will exist. Check for good connection at crankshaft position sensor and at PCM. Many intermittent problems are caused by faulty electrical connections or wiring. When attempting to diagnoses 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 it near rpm that the problem occurs. Since heat and vibration are often the cause of intermittent, this may bring out the failure.

TEST DESCRIPTION
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.