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Test Description

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. 6:  This step simulates a CKP sensor signal to the PCM. If the PCM receives the signal, the fuel pump will operate for 2 seconds. If the fuel pump operates, the condition involves terminal contact at one of the following components:
    • The CKP sensor
    • The CKP sensor reluctor wheel
DTC P0335

Step Action Value Yes No
Schematic Reference:  Engine Controls Schematics 
Connector End View Reference:  Powertrain Control Module (PCM) Connector End Views  or  Engine Controls Connector End Views 
1 Did you perform the Diagnostic System Check-Engine Controls? - Go to Step 2  Go to Diagnostic System Check - Engine Controls
2 Does the engine start and continue to run? - Go to Step 3  Go to Step 4 
3
  1. Observe the Freeze Frame/Failure Records data for this DTC.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. 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 data.
Does the DTC fail this ignition?		 - Go to Step 4  Go to Intermittent Conditions
4
  1. Turn ON the ignition, with the engine OFF.
  2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Disconnect the CKP sensor.
  4. Measure the voltage from the 12-volt reference circuit of the CKP sensor to a good ground with a DMM.
Does the DMM display the specified value?		 B+ Go to Step 5  Go to Step 7 
5 Measure the voltage between the 12-volt reference circuit and the low reference circuit with the DMM.
Does the DMM display the specified value?		 B+ Go to Step 6  Go to Step 8 
6  Connect the test lamp between the CKP sensor signal circuit and the 12-volt reference of the CKP sensor.
Does the fuel pump operate if you apply the ignition voltage to the CKP sensor signal circuit?		 - Go to Step 11  Go to Step 9 
7 Test for an open or short to ground in the 12-volt reference circuit of the CKP. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 14 
8 Test for an open CKP low reference circuit. Refer to Circuit Testing or Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 14 
9 Test the CKP sensor signal circuit for the following conditions:
  • An open
  • A short to ground
  • A short to voltage

Refer to Testing for Intermittent Conditions and Poor Connections and Circuit Testing in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 10 
10 Test for poor connections 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 15  Go to Step 11 
11
  1. Remove the CKP sensor. Refer to Crankshaft Position (CKP) Sensor Replacement .
  2. Inspect the CKP Sensor for the following conditions:
    • Excessive air gap between the CKP sensor and the reluctor wheel
    • Physical damage
    • Improper installation
    • Electromagnetic interference in the CKP sensor circuits
    • Foreign material passing between the CKP sensor and the reluctor wheel
  3. If you locate a condition, repair the condition as necessary.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 12 
12 Test the CKP sensor reluctor wheel for the following conditions:
  • Physical damage
  • Improper installation
  • Excessive endplay or looseness

Refer to Crankshaft and Bearings Removal in Engine Mechanical.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 13 
13 Replace the CKP Sensor. Refer to Crankshaft Position (CKP) Sensor Replacement .
Did you complete the repair?		 - Go to Step 16  -
14 Replace the PCM. Refer to Powertrain Control Module (PCM) Replacement .
Did you complete the repair?		 - Go to Step 15  -
15
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. 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 16 
16 Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List System OK
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