Circuit Description
The powertrain control module (PCM) uses the crankshaft position (CKP) sensor and the exhaust camshaft position (CMP) sensor information to monitor the correlation between the crankshaft and camshaft positions. If the PCM detects a CMP sensor pulse occurs during the incorrect CKP DTC P0017 will set.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P0017 Crankshaft Position (CKP)-Exhaust Camshaft Position (CMP) Correlation
Conditions for Running the DTC
| • | DTCs P0335, P0336, P0340, P0341, P0365, P0366 are not set. |
| • | The engine is running. |
| • | The CMP actuator is commanded to zero. |
| • | DTC P0017 runs continuously once the above conditions are met. |
Conditions for Setting the DTC
The PCM detects 25 out of the last 35 cam revolutions occur with 2 cam sensor pulses outside the CKP window.
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. |
Diagnostic Aids
Important: The scan tool control of the CMP actuator solenoid is inhibited when DTC P0017 sets.
The following conditions may cause this DTC to set:
| • | An improperly torqued crankshaft balancer |
| • | A mis-built or mis-timed engine |
| • | A loose or missing crankshaft balancer bolt |
| • | Excessive crankshaft endplay |
| • | The CMP actuator solenoid stuck open |
| • | The CMP actuator stuck in a position other than 0 degrees |
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module Connector End Views or Engine Controls Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Did the DTC fail this ignition? | Go to Step 3 | Go to Diagnostic Aids |
3 |
Was the crankshaft balancer bolt at the proper torque? | Go to Step 4 | Go to Crankshaft Balancer Replacement in Engine Mechanical |
4 |
Does the pintle inside the CMP actuator solenoid move? | Go to Step 5 | Go to Step 7 |
5 | Inspect the CMP actuator for binding or being stuck. Refer to Camshaft Position Actuator Diagnosis in Engine Mechanical. Did you find and correct the condition? | Go to Step 8 | Go to Step 6 |
6 | Inspect the engine for correct valve timing. Refer to Camshaft Timing Chain and Sprocket Replacement in Engine Mechanical. Did you find and correct the condition? | Go to Step 8 | Go to Diagnostic Aids |
7 | Replace the CMP actuator solenoid valve. Refer to Camshaft Position Actuator Solenoid Valve Replacement . Did you complete the replacement? | Go to Step 8 | -- |
8 |
Did the DTC fail this ignition? | Go to Step 2 | Go to Step 9 |
9 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | System OK |
