Test Description

The number below refers to the step number on the diagnostic table.

2: When the ECM enables starter operation, the ECM also initiates the diagnostic test routines for the CKP and camshaft position (CMP) sensors. If the ignition switch is in the start position for more than 4 seconds without the engine cranking, the CKP diagnostics may fail and set this DTC.

DTC P0335

Step	Action	Value(s)	Yes	No
Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Control Module (ECM) Connector End Views or Engine Controls Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	-	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Attempt to start the engine. Does the engine crank?	-	Go to Step 3	Go to Symptoms - Engine Electrical in Engine Electrical
3	Attempt to start the engine. Does the engine start and run?	-	Go to Step 4	Go to Step 5
4	Turn OFF the ignition. Disconnect the engine control module (ECM). Measure the resistance between the signal circuit and the low reference circuit of the crankshaft position (CKP) sensor with a DMM. Refer to Circuit Testing in Wiring Systems. Is the resistance within the specified range?	500-900 Ω	Go to Intermittent Conditions	Go to Step 12
5	Crank the engine. Observe the CKP Active Counter parameter with a scan tool. Does the CKP Active Counter increment?	-	Go to Step 13	Go to Step 6
6	Test the signal circuit for the following conditions: A short to voltage An open High resistance Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 14	Go to Step 7
7	Test the low reference circuit for the following conditions: A short to voltage An open High resistance The CKP sensor circuits shorted together Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 14	Go to Step 8
8	Test for an intermittent and for a poor connection at the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 14	Go to Step 9
9	Test for an intermittent and for a poor connection at the CKP sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 14	Go to Step 10
10	Remove the CKP sensor. Refer to Crankshaft Position (CKP) Sensor Replacement . Visually inspect the CKP sensor for the following conditions: Physical damage Excessive play or looseness Improper installation Foreign material passing between the CKP sensor and the reluctor wheel Electromagnetic interference in the CKP sensor circuits Did you find and correct the condition?	-	Go to Step 14	Go to Step 11
11	Inspect the CKP reluctor wheel for the following conditions: Physical damage Excessive end play or looseness Improper installation Refer to Crankshaft and Bearings Cleaning and Inspection in Engine Mechanical. Did you find and correct the condition?	-	Go to Step 14	Go to Step 12
12	Replace the CKP sensor. Refer to Crankshaft Position (CKP) Sensor Replacement . Did you complete the replacement?	-	Go to Step 14	-
13	Replace the ECM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement?	-	Go to Step 14	-
14	Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition?	-	Go to Step 2	Go to Step 15
15	Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed?	-	Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information	System OK