GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2003 🢒 L300/LW300 🢒 Engine 🢒 Engine Controls - 3.0L (L81) 🢒 DTC P0335

Circuit Description

The crankshaft position (CKP) sensor is a variable reluctance sensor. The CKP sensor indicates the crankshaft speed and position. The CKP sensor produces an AC voltage of different amplitude and frequency. The frequency depends on the velocity of the crankshaft. The AC voltage output depends on the crankshaft position and the battery voltage. The CKP sensor works in conjunction with a 58 tooth reluctor wheel on the crankshaft. The CKP sensor connects to the engine control module (ECM) through the following circuits:

    • A CKP sensor signal
    • A low reference
    • A ground

If the ECM detects no signal from the CKP sensor, DTC P0335 sets.

Conditions for Running the DTC
    • DTCs P0341, P0342, P0343 are not set.
    • The engine is cranking or running.

Conditions for Setting the DTC

The ECM has detected no CKP sensor pulses.

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.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. This step tests for an internally shorted CKP sensor.

    2.

  2. This step tests for a short to voltage in the battery circuit.

    3.

  3. This step tests for a short to voltage in the battery circuit.

    4.

  4. This step tests for a short to voltage in the ignition circuit.

    5.

  5. This step tests for a short to voltage in the ignition circuit.

Step

Action

Values

Yes

No

Schematic Reference: Engine Controls Schematics

Connector End View Reference: Engine Control Module 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

Attempt to start the engine

Does the engine start and run?

--

Go to Step 3

Go to Step 4

3
  1. Observe the Freeze Frame/Failure Records for this DTC.
  2. Turn OFF the ignition for 90 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 4

Go to Intermittent Conditions

4

  1. Turn OFF the ignition.
  2. Disconnect the crankshaft position (CKP) sensor.
  3. Measure the resistance from the signal circuit to the low reference circuit of the CKP sensor at the component side of the CKP harness connector with a DMM. Refer to Circuit Testing in Wiring Systems.

Is the resistance within the specified range?

800-1200 ohms

Go to Step 5

Go to Step 19

5

Measure the voltage from the signal circuit of the CKP sensor to a good ground at the controller side of the CKP harness connector with a DMM. Refer to Circuit Testing in Wiring Systems.

Is the voltage more than the specified value?

4 V

Go to Step 12

Go to Step 6

6

Measure the voltage from the low reference circuit of the CKP sensor to a good ground at the controller side of the CKP harness connector with a DMM. Refer to Circuit Testing in Wiring Systems.

Is the voltage more than the specified value?

4 V

Go to Step 13

Go to Step 7

7

  1. Turn ON the ignition, with the engine OFF.
  2. Measure the voltage from the signal circuit of the CKP sensor to a good ground at the controller side of the CKP harness connector with a DMM. Refer to Circuit Testing in Wiring Systems.

Is the voltage more than the specified value?

4 V

Go to Step 12

Go to Step 8

8

Measure the voltage from the low reference circuit of the CKP sensor to a good ground at the controller side of the CKP harness connector with a DMM. Refer to Circuit Testing in Wiring Systems.

Is the voltage more than the specified value?

4 V

Go to Step 13

Go to Step 9

9

Measure the voltage from the signal circuit of the CKP sensor to a good ground at the controller side of the CKP harness connector with a DMM. Refer to Circuit Testing in Wiring Systems.

Is the voltage less than the specified value?

2 V

Go to Step 14

Go to Step 10

10

Measure the voltage from the low reference circuit of the CKP sensor to a good ground at the controller side of the CKP harness connector with a DMM. Refer to Circuit Testing in Wiring Systems.

Is the voltage less than the specified value?

2 V

Go to Step 15

Go to Step 11

11
  1. Turn OFF the ignition.
  2. Disconnect the engine control module (ECM).
  3. Measure the continuity between the signal circuit and the low reference circuit of the CKP sensor at the controller side of the CKP sensor harness connector with a DMM. Refer to Circuit Testing in Wiring Systems.

Does the DMM display the specified value?

OL

Go to Step 23

Go to Step 16

12

Test the signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 23

Go to Step 17

13

Test the low reference circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 23

Go to Step 17

14

Test the signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 23

Go to Step 17

15

Test the low reference circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 23

Go to Step 17

16

Test the signal circuit shorted to the low reference circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 23

Go to Step 17

17

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 23

Go to Step 18

18

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 23

Go to Step 22

19

Remove the CKP sensor. Refer to Crankshaft Position Sensor Replacement .

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

Did you find and correct the condition?

--

Go to Step 23

Go to Step 20

20

Inspect the reluctor wheel for the following conditions. Refer to Crankshaft and Bearing Cleaning and Inspection in Engine Mechanical.

    • Physical damage
    • Excessive end play or looseness
    •  Improper installation

The following may cause this condition to occur:

    • Excessive air gap between the CKP sensor and the reluctor wheel
    • Electromagnetic interference in the CKP sensor circuits
    • Foreign material passing between the CKP sensor and the reluctor wheel

Did you find and correct the condition?

--

Go to Step 23

Go to Step 21

21

Replace the CKP sensor. Refer to Crankshaft Position Sensor Replacement .

Did you complete the replacement?

--

Go to Step 23

--

22

Replace the ECM. Refer to Engine Control Module Replacement .

Did you complete the replacement?

--

Go to Step 23

--

23
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 90 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 24

24

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