The purpose of this test is to evaluate the operation of an inductive crankshaft position sensor, which has a ground reference and with the engine running.
Connection for diagnostic work will vary dependent on application.
Technicians should whenever possible gain access to the test circuit without damage to seals and insulation. If this is not possible then make sure appropriate repairs are completed.
General connection advice
PicoScope offers a range of options within the test kits.
Dependent on difficulty of access, choose from:
Testing Sensors and Actuators (to include relevant circuit/connectors):
A known good waveform, the amplitude and frequency showing correct voltage levels and changes as the engine speed changes.
Clear indication of the ‘missing tooth’ signal.
No spikes or inconsistent pattern breaks.
If the waveform indicates a fault, make a physical inspection of the CPS. The list below highlights some key areas for inspection.
Generic DTC’s Crankshaft Position Sensor.
P0016 - Crankshaft Position Camshaft Position Correlation Bank 1 Sensor A
P0315 - Crankshaft position (CKP) system variation values are not stored in the PCM memory
P0335 - CKP Sensor A Circuit Performance
P0336 - Crankshaft Position (CKP) Sensor A Performance
P0337 - Crankshaft Position (CKP) Sensor Circuit Low Duty Cycle
P0338 - Crankshaft Position (CKP) Sensor Circuit High Duty Cycle
P0339 - Crankshaft Position (CKP) Sensor Circuit Intermittent
P0385 - Crankshaft Position (CKP) Sensor B Circuit
P0386 - Crankshaft Position (CKP) Sensor B Performance
P0387 - Crankshaft Position Sensor B Circuit Low Input
P0388 - Crankshaft Position Sensor B Circuit High Input
P0389 - Crankshaft Position Sensor B Circuit Intermittent
P1324 - Crank RPM Too Low
P1335 - CKP Circuit
P1336 - Crankshaft Position (CKP) System Variation Not Learned
P1345 - Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation
P1372 - Crankshaft Position (CKP) Sensor A-B Correlation
This help topic is subject to changes without notification. The information within is carefully checked and considered to be correct. This information is an example of our investigations and findings and is not a definitive procedure. Pico Technology accepts no responsibility for inaccuracies. Each vehicle may be different and require unique test settings.
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