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P0365



DTC P0365

DTC DESCRIPTORS

DTC P0340
Intake CMP Sensor Circuit

DTC P0341
Intake Camshaft Position (CMP) Sensor Performance

DTC P0365
Exhaust Camshaft Position (CMP) Sensor Circuit

DTC P0366
Exhaust Camshaft Position (CMP) Sensor Performance

DIAGNOSTIC FAULT INFORMATION

IMPORTANT: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Testing and Inspection






CIRCUIT/SYSTEM DESCRIPTION
Each camshaft position (CMP) sensor produces a 4X signal for each revolution of the camshaft. This signal is used for startability. If the engine control module (ECM) does not receive a crankshaft position (CKP) sensor signal, the engine should still start based off of the information from the CAM. The CMP is connected directly to the ECM and consists of the following circuits:
- A 5-Volt reference circuit
- A low reference circuit
- A CMP sensor signal circuit

The ECM 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 P0341. 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.

CONDITIONS FOR RUNNING THE DTC

P0340 and P0365
- The engine is running.
- DTCs P0340 and P0365 run continuously when the above condition is met.

P0341 - Near Engine Start, CMP Fast Event Based Test
- The engine is cranking.
- The medium resolution is less than or equal to 10 counts.

P0341 - After Engine Start, CMP Slow Event Based Test
- The engine is running.
- DTCs P0335, P0336, and P0340 are not set.
- DTC P0341 runs continuously when the above conditions are met.

P0366 - Near Engine Start, CMP Fast Event Based Test
- The engine is cranking.
- The medium resolution is less than or equal to 10 counts.

P0366 - 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

P0340
The ECM does not receive 4 camshaft pulses within 3 seconds.

P0341 - Near Engine Start, CMP Fast Event Based Test
The ECM detects the incorrect number of CMP sensor pulses in 2 revolutions of the crankshaft, which is usually within 1 second.

P0341 - After Engine Start, CMP Slow Event Based Test
The ECM detects the incorrect number of CMP sensor pulses in 2,000 revolutions of the crankshaft, which is usually within 4 minutes.

P0365
The ECM does not receive 4 camshaft pulses within 3 seconds

P0366 - Near Engine Start, CMP Fast Event Based Test
The ECM detects the incorrect number of CMP sensor pulses in 2 revolutions of the crankshaft, which is usually within 1 second.

P0366 - After Engine Start, CMP Slow Event Based Test
The ECM detects the incorrect number of CMP sensor pulses in 2,000 revolutions of the crankshaft, which is usually within 4 minutes.

ACTION TAKEN WHEN THE DTC SETS
- The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame and/or the Failure Records.
- The control module commands the TAC system to operate in the Reduced Engine Power mode.
- A message center or an indicator displays Reduced Engine Power.
- Under certain conditions the control module commands the engine OFF.

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.

CIRCUIT/SYSTEM VERIFICATION
With the engine running, observe the CMP active counter. The CMP active counter should continually increase from 0 counts to 55 counts.

CIRCUIT/SYSTEM TESTING
1. With the ignition OFF, inspect the engine wiring harness carrying the CMP sensor circuits for the following conditions:
- Close routing of secondary ignition wires
- Close routing of aftermarket electrical equipment
- Close to solenoids, motors and relays
2. Ignition ON, test for 4.8-5.2 volts between both 5-Volt reference circuits and the negative terminal of the battery.
- If more than 5.2 volts, test the affected 5-Volt reference circuit for a short to voltage or faulty ECM.
- If less than 4.8 volts, test the affected 5-Volt reference circuit for an open or short to ground or a faulty ECM.
3. Ignition ON, test for 4.8-5.2 volts between both signal circuits and the negative terminal of the battery.
- If more than 5.2 volts, test the affected signal circuit for a short to voltage or faulty ECM.
- If less than 4.8 volts, test the affected signal circuit for an open or short to ground or a faulty ECM.
4. With the ignition ON, the engine OFF, and the sensor disconnected, install a test lamp between the signal circuit and the negative terminal of the battery.
- If the test lamp does illuminate, test the signal circuit of the affected sensor for a short to voltage or a faulty ECM.
5. With the ignition ON, the engine OFF, and the sensor disconnected, install a test lamp between the low reference circuit and battery voltage.
- If the test lamp does not illuminate, test the low reference circuit of the affected sensor for an open, high resistance or a faulty ECM.
6. With the ignition ON, engine OFF, and a jumper wire connected to ground, probe the CMP sensor signal circuit repeatedly. The CMP active counter parameter should increment.
- If the CMP active counter does not increment, test for a faulty ECM.
7. Inspect the camshaft reluctor wheel for damage.
- If damage is found, replace as necessary.
8. If all circuits test normal, replace the CMP sensor.

REPAIR INSTRUCTIONS

IMPORTANT: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure.
- Control Module References for ECM replacement, setup, and programming
- Camshaft Position (CMP) Sensor Replacement-Intake
- Camshaft Position (CMP) Sensor Replacement-Exhaust. Verification Tests
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