• | 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 |
---|---|---|---|---|
CKP Sensor Signal | P0335 | -- | -- | P0336 |
Low Reference | P0335 | -- | -- | P0336 |
Shielded Ground | -- | -- | -- | P0336 |
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 synchronize 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:
• | The signal |
• | The low reference |
• | The shielded ground |
• | The engine is cranking or running. |
• | The DTC runs continuously once the above condition is met. |
• | The engine speed is greater than 512 RPM. |
• | The DTC runs continuously once the above condition is met. |
The ECM does not detect a signal from the CKP sensor.
The ECM detects greater than 2 pulses incorrect at each reference pulse.
DTCs P0335 and P0336 are Type B DTCs.
DTCs P0335 and P0336 are Type B 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 |
Electronic Ignition (EI) System Description
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information
Important: If the CKP sensor lead is damaged in any way, replace the CKP sensor.
⇒ | If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM. |
⇒ | If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the ECM. |
⇒ | If less than the specified range, test the low reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM. |
⇒ | If greater than the specified range, test the low reference circuit for a short to voltage. If the circuit tests normal, replace the ECM. |
Important: If the CKP sensor lead is damaged in any way, replace the CKP sensor.
⇒ | If not within the specified range, replace the 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 engine control module replacement, setup, and programming |