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DTC P0335-P0337 - Without FX3

Diagnostic Instructions

    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    • Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0335: Crankshaft Position (CKP) Sensor Circuit

DTC P0336: Crankshaft Position (CKP) Sensor Performance

DTC P0337: Crankshaft Position (CKP) Sensor Circuit Low Duty Cycle

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Signal

-

P0335, P0337

-

P0336, P0337

Low Reference

-

P0335, P0337

-

P0336, P0337

Ground

-

-

-

P0336, P0337

Circuit/System Description

The crankshaft position (CKP) sensor signal 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, and the AC voltage output depends on the crankshaft position and battery voltage. The CKP sensor works in conjunction with a 58X reluctor wheel attached to the crankshaft. The engine control module (ECM) can synchronise the ignition timing, fuel injector timing, and spark knock control based on the CKP and the camshaft position (CMP) sensor inputs. The CKP sensor is also used to detect misfire and tachometer display. The CKP sensor circuits are connected directly to the ECM. The circuits between the CKP sensor and the ECM consist of the following circuits:

    • A signal
    • A low reference
    • A shielded ground

Conditions for Running the DTC

P0335 or P0336

    • The engine is running.
    • The DTC runs continuously when the above conditions are met.

P0337

    • The engine is cranking.
    • No fault related to CMP exists.
    • The DTC runs continuously when the above conditions are met.

Conditions for Setting the DTC

P0335

    • The ECM detects that the minimum CKP sensor signal voltage is less than 1.3196 V or,
    • The ECM detects that the maximum CKP sensor signal voltage is greater than 2.3998 V or,
    • The ECM detects that the difference between minimum and maximum signal voltage is less than 0.3617 V.

P0336

The ECM detects more than 2 extra or missing teeth during 1 crankshaft revolution.

P0337

The ECM detects no crankshaft teeth within 12 camshaft pulses.

Action Taken When the DTC Sets

DTC P0335, P0336, and P0337 are Type E DTCs.

Conditions for Clearing the DTC

DTC P0335, P0336, and P0337 are Type E DTCs.

Diagnostic Aids

The following conditions could also set the DTCs:

    • Physical damage to the CKP sensor or the reluctor wheel
    • Excessive play or looseness of the CKP sensor or the reluctor wheel
    • Improper installation of the CKP sensor or the reluctor wheel
    • Foreign material passing between the CKP sensor and the reluctor wheel
    • Excessive air gap between the CKP sensor and the reluctor wheel

Reference Information

Schematic Reference

Engine Controls Schematics : Siemens ECM - LPG with LCP → Siemens ECM - Gas without FX3 or LCP → Delphi ECM - FX3

Connector End View Reference

Component Connector End Views

Description and Operation

Electronic Ignition System Description

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information.

Circuit/System Verification

  1. Attempt to start the engine, verify that the DTCs P0335, P0336, or P0337 is not set.
  2. Move related harnesses/connectors of the B30 Crankshaft Position Sensor and verify the engine does not stumble, stall, or change engine speed.
  3. Operate the vehicle within the Conditions For Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Note: If the CKP sensor lead is damaged in any way, replace the CKP sensor.

  1. Ignition OFF, disconnect the harness connector at the B30 crankshaft Position Sensor.
  2. Ignition ON, test for 1.5-2.0 V between the circuit terminal below and ground.
  3. • Signal circuit terminal 3 of the B30 CKP sensor harness connector
    • Low reference circuit terminal 2 of the B30 CKP sensor harness connector
    If less than the specified range, test the circuits for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
    If greater than the specified range, test the circuits for a short to voltage. If the circuit tests normal, replace the K20 ECM.
  4. If all circuits test normal, test or replace the B30 CKP sensor.

Component Testing

    Note: If the CKP sensor lead is damaged in any way, replace the CKP sensor.

  1. Ignition OFF, disconnect the harness connector at the CKP sensor.
  2. Test for 460-620 Ω between the signal terminal 3 and the low reference terminal 2.
  3. If not within the specified range, replace the B30 CKP sensor.
  4. Disconnect the fuel pump relay.
  5. Set the DMM to the AC voltage scale.
  6. Engine cranking, test for greater than 1.4 ACV between the signal terminal 3 and low reference terminal 2.
  7. If less than the specified range, replace the CKP sensor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Crankshaft Position Sensor Replacement
    • Control Module References for ECM replacement, setup, and programming.
   


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