The hall effect crankshaft position (CKP) sensor signal indicates the crankshaft speed and position. There are 57 teeth on the front of the crankshaft sprocket, plus a sync gap. The CKP sensor will output an ON-OFF pulse as each window passes the sensing element. The CKP sensor is connected directly to the engine control module (ECM) by the following circuits:
• | The 12-volt reference circuit |
• | The low reference circuit |
• | The CKP sensor signal circuit |
This diagnostic procedure supports the following DTC:
DTC P0336 Crankshaft Position (CKP) Sensor Performance
• | The engine is cranking or running. |
• | DTC P0336 runs continuously when the above condition is met. |
The ECM determines that the CKP sensor signal is out of range for less than 2 seconds.
• | 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. |
• | 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. |
• | An intermittent CKP sensor signal may cause DTC P0336 to set. Wiggle the wiring harness with the engine running and observe the CKP Signal Missed parameter of the scan tool. If the parameter indicates anything other than 0, there is an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections and Inducing Intermittent Fault Conditions in Wiring Systems. |
• | If the condition is intermittent, refer to Intermittent Conditions . |
Step | Action | Yes | No | ||||||||||||||
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Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine 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 |
Did you find and correct the condition? | Go to Step 10 | Go to Step 4 | ||||||||||||||
4 |
Did you find and correct the condition? | Go to Step 10 | Go to Step 5 | ||||||||||||||
5 | Test for an intermittent and for a poor connection at the CKP sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 6 | ||||||||||||||
6 | Test for an intermittent and for a poor connection of the CKP sensor circuits at the engine control module (ECM). Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 7 | ||||||||||||||
7 |
Did you find and correct the condition? | Go to Step 10 | Go to Step 8 | ||||||||||||||
8 | Inspect the CKP reluctor wheel for the following conditions:
Refer to Crankshaft Reluctor and Oil Pump Drive Gear Replacement in Engine Mechanical - 6.6L. Did you find and correct the condition? | Go to Step 10 | Go to Step 9 | ||||||||||||||
9 | Replace the CKP sensor. Refer to Crankshaft Position Sensor Replacement . Did you complete the replacement? | Go to Step 10 | -- | ||||||||||||||
10 |
Did the DTC fail this ignition? | Go to Step 2 | Go to Step 11 | ||||||||||||||
11 | 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 |