DTC P0335 Crankshaft Position (CKP) Sensor Circuit. Generic Unit Repair 1999

For 1990-2009 cars only

Makes 🢒 Generic 🢒 1999 🢒 Unit Repair 🢒 DTC 🢒 DTC P0335 Crankshaft Position (CKP) Sensor Circuit

Engine Controls Components
Ignition System
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice

Circuit Description

The crankshaft position sensor is a Hall-effect type sensor that monitors crankshaft position and speed. There are four teeth 90 degrees apart on the front of the crankshaft sprocket that induce a pulse in the sensor which is transmitted to the PCM. The signal allows the PCM to determine TDC and RPM.

Conditions for Running the DTC

•	The PCM performs this DTC diagnostic continuously.

•	Engine operating.

Conditions for Setting the DTC

•	The number of consecutive missing Crank pulses are greater than or equal to 8.

•	All diagnostic set conditions met for 2 seconds.

Action Taken When the DTC Sets

•	The PCM illuminates the malfunction indicator lamp (MIL) on the first consecutive drive trip that the diagnostic runs and fails.

•	The Freeze Frame records the operating conditions at the time of failure and updates the Failure Records.

•	The PCM will activate back up 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 after forty consecutive warm-up cycles, if this or any other emission related diagnostic does not report any failures.

•	Use of a scan tool

Diagnostic Aids

Important: Remove any debris from the PCM module connector surfaces before servicing the PCM module. Inspect the PCM module connector gaskets when diagnosing/replacing the module. Ensure that the gaskets are installed correctly. The gaskets prevent contaminate intrusion into the PCM module.

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 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 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.

This step will determine if DTC P0335 is the result of a hard failure or an intermittent condition.

This step checks the 5 volt reference circuit (the 5 volt reference may vary slightly).

This step checks the ground circuit.

Step	Action	Value(s)	Yes	No
1	Important: Before clearing any DTCs, use the scan tool Capture Info to save freeze frame and failure records for reference. The control module's data is deleted once the Clear Info function is used. Did you perform the Powertrain On-Board Diagnostic (OBD) System Check?	--	Go to Step 2
2	Start and idle the engine. Observe the Crank Ref. Missed display on the scan tool. Does the scan tool display a value greater than or equal to the specified value?	8	Go to Step 4	Go to Step 3
3	The DTC is intermittent. If no additional DTCs are stored, refer to the applicable DTC table(s) first. Are any additional DTCs stored?	--	Go to the applicable DTC table	Go to Diagnostic Aids
4	Turn the ignition OFF. Disconnect the CKP sensor electrical connector. Turn the ignition ON leaving the engine OFF. With a DMM connected to ground, measure the voltage between the CKP 5 volt reference circuit at the engine harness connector. Is the voltage within the specified range?	4.8-5.2 V	Go to Step 5	Go to Step 8
5	Probe the sensor ground circuit with an unpowered test lamp connected to B+. Is the test lamp ON?	--	Go to Step 6	Go to Step 9
6	Reconnect the CKP sensor. Disconnect the PCM connector containing the CKP signal circuit. Remove the CKP signal circuit terminal from the PCM connector. Reinstall the terminal lock on the connector. Reconnect the PCM connector. With a DMM connected to ground, measure the voltage at the CKP signal circuit terminal. Crank the engine. Is the voltage within the specified value?	4.2-4.5 V	Go to Step 14	Go to Step 7
7	Is the voltage greater than the specified value?	4.2-4.5 V	Go to Step 12	Go to Step 11
8	Turn the ignition OFF. Disconnect the PCM, and check the CKP 5 volt reference circuit for an open, short to ground, or short to the sensor ground circuit. If the CKP 5 volt reference circuit is open or shorted to ground, repair it as necessary. Refer to . Did you perform a repair?	--	Go to Step 17	Go to Step 10
9	Check for an open or a proper sensor ground terminal connection at the PCM. If a problem is found, repair the problem as necessary. Refer to . Did you perform a repair?	--	Go to Step 17	Go to Step 16
10	Check the CKP 5 volt reference circuit for a proper connection at the PCM and replace the terminal if necessary. Refer to. Did the terminal require replacement?	--	Go to Step 17	Go to Step 16
11	Turn the ignition OFF. Disconnect the PCM and check the CKP signal circuit for an open, short to ground, or short to the sensor ground circuit. Check the terminal connections at the CKP sensor for damage or a poor connection. If a problem is found, repair the problem as necessary. Refer t Did you perform a repair?	--	Go to Step 17	Go to Step 15
12	Disconnect the CKP sensor pigtail connector. Turn the ignition ON leaving the engine OFF. With the DMM connected to ground, probe the CKP signal circuit at the engine harness connector. Is the voltage greater than the specified value?	4.5 V	Go to Step 13	Go to Step 14
13	Repair the short to voltage on the CKP sensor signal circuit. Refer to . Is the action complete?	--	Go to Step 17	--
14	Check the CKP signal circuit for a proper connection at the PCM and replace the terminal if necessary. Did the terminal require replacement?	--	Go to Step 17	Go to Step 16
15	Replace the crankshaft position sensor. After replacing the sensor, the PCM must be programmed with a new TDC Offset. . Is the action complete?	--	Go to Step 17	--
16	Important: The new PCM must be programmed. Replace the PCM. Is the action complete?	--	Go to Step 17	--
17	Using the scan tool, clear the DTCs. Start the engine. Allow the engine to idle until the engine reaches normal operating temperature. Select DTC and the specific DTC function. Enter the DTC number which was set. Operate the vehicle, with the Conditions for Setting this DTC, until the scan tool indicates the diagnostic Ran. Does the scan tool indicate the diagnostic Passed?	--	Go to Step 18	Go to Step 2
18	Does the scan tool display any additional undiagnosed DTCs?	--	Go to the applicable DTC table	System OK