Test Procedure

DR1 CHECK FOR DTCS

Are DTCs P0340, P0341, or P0344 present?

Yes	No
GO to DR2.	For symptoms without DTCs, GO to DR2. For all others, RETURN to SYMPTOM CHARTS for further direction.

DR2 CLEAR AND ATTEMPT TO RETRIEVE THE DTC

NOTE: Concerns with the engine oil level, oil filter, oil contamination, ignition system, radio frequency interference or the variable camshaft timing (VCT) system may cause camshaft positioning errors.

Ignition ON, engine OFF.
Clear the PCM DTCs.
Ignition ON, engine running.
Increase engine speed to greater than 1, 500 RPM for 10 seconds. Repeat this 3 times.
Carry out the PCM self-test.

Are DTCs P0340, P0341 or P0344 present?

Yes	No
For DTC P0341, GO to DR10. For all others, GO to DR3.	For symptoms without DTCs, RETURN to SYMPTOM CHARTS for further direction. For all others, GO to PINPOINT TEST Z .

DR3 CHECK THE VBPWR CIRCUIT FOR AN OPEN

NOTE: For circuit DTCs set as a result of a concern with more than one component, refer to the Electronic Engine Controls Wiring Diagrams article and identify the common cause, such as the SIGRTN circuits.

Ignition OFF.
CMP11 Sensor connector disconnected.
Ignition ON, engine OFF.
Measure the voltage between:

(+) CMP11 Sensor Connector, Harness Side	(-) CMP11 Sensor Connector, Harness Side
VBPWR - Pin 1	SIGRTN - Pin 3

Is the voltage greater than 10.5 V?

Yes	No
GO to DR6.	GO to DR4.

DR4 CHECK THE VBPWR AND SIGRTN CIRCUITS FOR AN OPEN

Ignition OFF.
PCM connector disconnected.

Measure the resistance between:

(+) CMP11 Sensor Connector, Harness Side	(-) PCM Connector, Harness Side
VBPWR - Pin 1	VBPWR - Pin T22
SIGRTN - Pin 3	SIGRTN - Pin T29

Are the resistances less than 5 ohms?

Yes	No
GO to DR5.	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

DR5 CHECK THE VBPWR CIRCUIT FOR A SHORT TO GROUND

Measure the resistance between:

(+) CMP11 Sensor Connector, Harness Side	(-)
VBPWR - Pin 1	Ground

Is the resistance greater than 10K ohms?

Yes	No
GO to DR11.	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

DR6 CHECK THE CMP11 CIRCUIT FOR AN OPEN

Ignition OFF.
PCM connector disconnected.
Measure the resistance between:

(+) CMP11 Sensor Connector, Harness Side	(-) PCM Connector, Harness Side
CMP11 - Pin 2	CMP11 - Pin T21

Is the resistance less than 5 ohms?

Yes	No
GO to DR7.	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

DR7 CHECK THE CMP11 CIRCUIT FOR A SHORT TO GROUND

Measure the resistance between:

(+) CMP11 Sensor Connector, Harness Side	(-)
CMP11 - Pin 2	Ground

Is the resistance greater than 10K ohms?

Yes	No
GO to DR8.	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

DR8 CHECK THE CMP11 CIRCUIT FOR A SHORT TO VOLTAGE

Ignition ON, engine OFF.

Measure the voltage between:

(+) CMP11 Sensor Connector, Harness Side	(-)
CMP11 - Pin 2	Ground

Is any voltage present?

Yes	No
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.	GO to DR9.

DR9 CHECK THE CMP11 SENSOR OPERATION

Ignition OFF.
CMP11 Sensor connector connected.
PCM connector connected.
Ignition ON, engine running.
Access the PCM and monitor the SYNC (MODE) PID.

Does the engine start and does the SYNC PID read YES?

Yes	No
GO to DR11.	INSTALL a new CMP11 sensor. REFER to the Electronic Engine Controls article. Clear the PCM DTCs. REPEAT the self-test.

DR10 INSPECT THE HARNESS

Ignition OFF.
Check the harness for routing, alterations, incorrect shielding, or electrical interference from other systems.
Check the CMP11 sensor connector for damage or corrosion.

Is a concern present?

Yes	No
REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test.	GO to DR11.

DR11 CHECK FOR DTCS

Carry out the PCM self-test.

Are any DTCs present?

Yes	No
INSTALL a new CMP11 sensor. REFER to the Electronic Engine Controls article. CLEAR the DTCs. REPEAT the self-test.	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.