P0336

DTC P0336

CIRCUIT DESCRIPTION
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 CMP sensor inputs. The CKP sensor is also used to detect misfire and tachometer display. The CKP sensor signal circuit and the low reference circuits are connected directly to the ECM. The shielded ground circuit is connected to ground. The circuits between the CKP sensor and the ECM consists of the following circuits:
- A CKP sensor signal
- A CKP sensor low reference
- A shielded ground

If the ECM detects an incorrect number of CKP pulses from the CKP sensor, DTC P0336 sets.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0336 Crankshaft Position (CKP) Sensor Performance

CONDITIONS FOR RUNNING THE DTC
- The engine is running.
- The number of extra or missing teeth is more than or equal to 2 per revolution.
- DTC P0336 runs continuously once the above conditions are met.

CONDITIONS FOR SETTING THE DTC
- The ECM detects extra or missing CKP pulses.
- The above condition is detected in 10 of 100 crankshaft rotations.

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.

TEST

Steps 1-3:

Steps 4-7:

Steps 8-11:

Step 12:

Steps 13-16:

Steps 17-18: