P0335

DTC P0335

CIRCUIT DESCRIPTION
The crankshaft position (CKP) sensor A is a 24X sensor and contains a hall-effect switch. This solid state switching device produces 24 digital ON/OFF pulses per engine revolution. These pulses occur when the interrupter ring, mounted to the crankshaft damper assembly and containing 24 evenly spaced blades and windows, passes between the sensor tip and a magnet. The 24X sensor is connected directly to the powertrain control module (PCM). The PCM provides 12 volts to the sensor on a 12-volt reference circuit, and provides a ground on a low reference circuit. The PCM receives the pulses from the sensor on the medium resolution engine speed signal circuit. The PCM uses the 24X signal for enhanced smoothness and idle stability at lower engine speeds. The PCM monitors the CKP sensor A for errors. If the PCM does not receive a signal from the CKP sensor A, DTC P0335 sets.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0335 Crankshaft Position (CKP) Sensor A Circuit

CONDITIONS FOR RUNNING THE DTC
- The engine is running for more than 3 seconds.OR
- The engine is cranking.
- DTC P0335 runs continuously when either condition is met.

CONDITIONS FOR SETTING THE DTC
- The PCM detects the following for every 2 engine revolutions:
- 6 low resolution engine speed signals
- 1 camshaft position (CMP) sensor signal
- 0 medium resolution engine speed signals
- The conditions are met for more than 8 seconds.

ACTION TAKEN WHEN THE DTC SETS
- The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.

DIAGNOSTIC AIDS
DTC P0335 can be caused by secondary components leaking high voltage into the ICM. Inspect for the following conditions:
- Incorrect harness routing near the secondary ignition components
- Ignition coil arcing to wiring harness or IC module-Inspect the ignition coils for cracks, carbon tracking, or other signs of damage.
- Secondary ignition wires arcing to the wiring harness
- If the DTC is determined to be intermittent, refer to Intermittent Conditions. Intermittent Conditions

TEST DESCRIPTION

Steps 1-11:

Steps 12-20:

The number below refers to the step number on the diagnostic table.
7. The 24X RPM on the scan tool should change each time the medium resolution engine speed signal circuit is touched.