Test Procedure

WARNING: This page is about a different variant/trim than selected.

V1 CHECK FOR DTCS

Are DTCs P0016, P0340, P0341 or P1177 present?

Yes	No
GO to V2 .	For symptoms without DTCs, GO to V2 . For all others, RETURN to SYMPTOM CHARTS for further direction.

V2 CHECK THE VOLTAGE TO THE CMP11 SENSOR

CMP11 Sensor connector disconnected.
Ignition ON, engine OFF.

Measure the voltage between:

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

Is the voltage between 4.5 - 5.5 V?

Yes	No
GO to V3 .	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

V3 CHECK THE CMP11 AND SIGRTN CIRCUITS FOR AN OPEN

Ignition OFF.
PCM-E connector disconnected.

Measure the resistance between:

(+) CMP11 Sensor Connector, Harness Side	(-) PCM-E Connector, Harness Side
CMP11 - Pin 2	CMP11 - Pin 32
SIGRTN - Pin 3	SIGRTN - Pin 47

Are the resistances less than 5 ohms?

Yes	No
GO to V4 .	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

V4 CHECK THE CMP11 AND SIGRTN CIRCUITS FOR A SHORT TO GROUND

Measure the resistance between:

(+) CMP11 Sensor Connector, Harness Side	(-)
CMP11 - Pin 2	Ground
SIGRTN - Pin 3	Ground

Are the resistances greater than 10K ohms?

Yes	No
GO to V5 .	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

V5 CHECK THE CMP11 AND SIGRTN CIRCUITS FOR A SHORT TO VOLTAGE

Ignition ON, engine OFF.

Measure the voltage between:

(+) CMP11 Sensor Connector, Harness Side	(-)
CMP11 - Pin 2	Ground
SIGRTN - Pin 3	Ground

Is any voltage present?

Yes	No
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.	GO to V6 .

V6 CHECK THE CMP11 SENSOR FOR CORRECT OPERATION

Ignition OFF.
PCM-E connector connected.

Connect a 5 amp fused jumper wire between the following:

Point A CMP11 Sensor Connector, Harness Side	Point B CMP11 Sensor Connector, Component Side
VREF - Pin 1	VREF - Pin 1
CMP11 - Pin 2	CMP11 - Pin 2
SIGRTN - Pin 3	SIGRTN - Pin 3

Ignition ON, engine OFF.

Measure the voltage between:

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

Record the voltage.
Ignition ON, engine running.

Measure the voltage between:

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

Is the voltage reading less than 0.5V with the ignition ON, engine OFF and greater than 2V with the ignition ON, engine running?

Yes	No
GO to V7 .	GO to V8.

V7 INSPECT THE HARNESS

Ignition OFF.
Remove the jumper wire(s).
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.	For DTC P1177, GO to V8 . For all others, GO to V9.

V8 CHECK THE CMP11 SENSOR

Ignition OFF.
Remove the jumper wire(s).
Inspect the CMP11 sensor connector for damaged or corroded pins.
Remove the CMP11 sensor.
Inspect the CMP11 sensor for misalignment and incorrect installation.
Inspect the CMP11 sensor for damage.

Is a concern present?

Yes	No
REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test.	For DTC P1177, the system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. For all others, INSTALL a new CMP11 sensor. REFER to the service information , Electronic Engine Controls. Clear the PCM DTCs. REPEAT the self-test.

V9 CHECK FOR CORRECT PCM OPERATION

Disconnect all the PCM connectors.
Visually inspect for:
- pushed out pins
- corrosion
Connect all the PCM connectors and make sure they seat correctly.
Carry out the PCM self-test.
Verify the concern is still present.

Is the concern still present?

Yes	No
INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.