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• | 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. |
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 |
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 |
• | The engine is running. |
• | The DTC runs continuously when the above conditions are met. |
• | The engine is cranking. |
• | No fault related to CMP exists. |
• | The DTC runs continuously when the above conditions are met. |
• | 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. |
The ECM detects more than 2 extra or missing teeth during 1 crankshaft revolution.
The ECM detects no crankshaft teeth within 12 camshaft pulses.
DTC P0335, P0336, and P0337 are Type E DTCs.
DTC P0335, P0336, and P0337 are Type E DTCs.
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 |
Engine Controls Schematics : Siemens ECM - LPG with LCP → Siemens ECM - Gas without FX3 or LCP → Delphi ECM - FX3
Electronic Ignition System Description
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information.
Note: If the CKP sensor lead is damaged in any way, replace the CKP sensor.
• | 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. |
Note: If the CKP sensor lead is damaged in any way, replace the CKP sensor.
⇒ | If not within the specified range, replace the B30 CKP sensor. |
⇒ | If less than the specified range, replace the CKP sensor. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for ECM replacement, setup, and programming. |
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