P0366

DTC P0366

Circuit Description

The exhaust camshaft position (CMP) sensor produces a 5X plus a sync signal for each revolution of the exhaust camshaft. These signals are for control of sequential fuel injection and for exhaust camshaft phaser control. The CMP is connected directly to the powertrain control module (PCM) and consists of the following circuits:

* 12-volt reference
* Low reference
* CMP sensor signal

If the PCM receives an incorrect number of CMP sensor pulses in a given number of crankshaft position (CKP) sensor pulses, DTC P0366 will set.

The PCM runs 2 tests to diagnose the CMP sensor performance system. It uses a Near Engine Start, CMP fast event based test, and an After Engine Start, CMP slow event based test. The Near Engine Start, CMP fast event based, test runs first upon or during start-up. If the test fails, it will set DTC P0366. If the test passes it will initiate the After Engine Start, CMP slow event based, test and runs this test continuously unless it detects an error and sets DTC P0366.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0366 Exhaust Camshaft Position (CMP) Sensor Performance

Conditions for Running the DTC

Near Engine Start (CMP Fast Event Based) Test
* The engine is cranking.
* The medium resolution is less than or equal to 10 counts.
* DTC P0365 is not set.

After Engine Start (CMP Slow Event Based Test)
* The engine is running.
* DTCs P0335, P0336, and P0365 are not set.
* DTC P0366 runs continuously when the above conditions are met.

Conditions for Setting the DTC

Near Engine Start (CMP Fast Event Based) Test

The PCM detects the incorrect number of CMP sensor pulses in 2 revolutions of the crankshaft.

After Engine Start (CMP Slow Event Based Test)

The PCM detects the incorrect number of CMP sensor pulses in 2,000 revolutions of the crankshaft.

Action Taken When the DTC Sets

* The malfunction indicator lamp (MIL) will illuminate after 2 consecutive ignition cycles in which the diagnostic runs with the malfunction present.
* The PCM will record the operating conditions at the time that the diagnostic fails. The Freeze Frame and Failure Records buffers will store this information.
* A history DTC stores.

Conditions for Clearing the MIL/DTC

* The MIL will turn OFF after 3 consecutive ignition cycles in which the diagnostic runs without a fault.
* A history DTC will clear after 40 consecutive warm up cycles without a fault.
* A scan tool can clear the DTCs.

Test Description

Step 10 - Step 11:

The numbers below refer to the step numbers on the diagnostic table.
2. This step verifies that the condition is present.
5. This step detects if there is electromagnetic interference (EMI) on the CMP sensor circuits.