Circuit Description
The crankshaft position (CKP) sensor signal indicates the crankshaft speed and position. The CKP sensor circuits are connected directly to the engine control module (ECM) and consists of the following circuits:
| • | The 12-volt reference circuit |
| • | The low reference circuit |
| • | The CKP sensor signal circuit |
If the ECM detects that the CKP sensor signal is inconsistent, DTC P0336 sets.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P0336 Crankshaft Position (CKP) Sensor Circuit
Conditions for Running the DTC
| • | The engine is cranking or running. |
| • | DTC P0336 runs continuously when the above conditions are met. |
Conditions for Setting the DTC
The ECM detects that the CKP sensor signal is inconsistent for 10 seconds.
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. |
Step | Action | Values | Yes | No | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 | |||||||||||
2 |
Important: If DTC P0335 is also set, diagnose DTC P0335 before proceeding with this DTC.
Did the DTC fail this ignition? | -- | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections | ||||||||||
3 | Inspect all of the crankshaft position sensor (CKP) circuits for the following conditions:
Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 4 | ||||||||||
4 |
Does the voltage measure above the specified value? | 11.5 V | Go to Step 5 | Go to Step 13 | ||||||||||
5 | Test the 12-volt reference circuit for an intermittent condition or shorted to other circuits. Refer to Testing for Electrical Intermittents and Inducing Intermittent Fault Conditions . Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 6 | ||||||||||
6 | Test the low reference circuit for an intermittent condition. Refer to Testing for Electrical Intermittents and Inducing Intermittent Fault Conditions . Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 7 | ||||||||||
7 | Test the CKP sensor signal circuit for an intermittent condition. Refer to Testing for Electrical Intermittents and Inducing Intermittent Fault Conditions . Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 8 | ||||||||||
8 | Test for an intermittent and for a poor connection at the CKP sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 9 | ||||||||||
9 | Test for an intermittent and for a poor connection at the engine control module (ECM). Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 10 | ||||||||||
10 |
Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 11 | ||||||||||
11 | Inspect the reluctor wheel for the following conditions:
Refer to Crankshaft and Bearing Cleaning and Inspection . Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 12 | ||||||||||
12 | Replace the CKP sensor. Refer to Crankshaft Position Sensor Replacement . Did you complete the replacement? | -- | Go to Step 14 | -- | ||||||||||
13 | Replace the ECM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 14 | -- | ||||||||||
14 |
Did the DTC fail this ignition? | -- | Go to Step 2 | Go to Step 15 | ||||||||||
15 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | -- | System OK | |||||||||||
