Test Procedure

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MB1 CHECK FOR DTCS

Are DTCs P0192, P0193 or P0194 present?

Yes	No
GO to MB2.	If sent here from Pinpoint Test M, GO to MB2. For symptoms without DTCs, GO to MB2. For all others, RETURN to SYMPTOM CHARTS for further direction.

MB2 INTERMITTENT CHECK

Ignition ON, engine OFF.
Access the PCM and monitor the FRP (VOLT) PID.
While observing the PID, carry out the following:
- Wiggle all accessible harness from the FRP sensor to the PCM and lightly tap on the sensor.
- Wiggle the FRP sensor connector.
- Look for sudden changes in the voltage when the harness and connector are wiggled or when the FRP sensor is tapped.

Is a concern present?

Yes	No
REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test.	GO to MB3.

MB3 CHECK FOR VREF VOLTAGE AT THE FRP SENSOR

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

(+) FRP Sensor Connector, Harness Side	(-) FRP Sensor Connector, Harness Side
VREF	SIGRTN

Is the voltage between 4.5 - 5.5 V?

Yes	No
GO to MB4.	GO to PINPOINT TEST B .

MB4 CHECK THE FRP CIRCUIT FOR AN OPEN

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

(+) FRP Sensor Connector, Harness Side	(-) PCM-E Connector, Harness Side
FRP	FRP

Is the resistance less than 5 ohms?

Yes	No
GO to MB5.	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

MB5 CHECK THE FRP CIRCUIT FOR A SHORT

Measure the resistance between:

(+) FRP Sensor Connector, Harness Side	(-)
FRP	Ground

Measure the resistance between:

(+) FRP Sensor Connector, Harness Side	(-) FRP Sensor Connector, Harness Side
FRP	VREF
FRP	SIGRTN

Are the resistances greater than 10K ohms?

Yes	No
GO to MB6.	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

MB6 CHECK THE FRP CIRCUIT FOR A SHORT TO VOLTAGE

Ignition ON, engine OFF.
Measure the voltage between:

(+) FRP Sensor Connector, Harness Side	(-)
FRP	Ground

Is any voltage present?

Yes	No
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.	INSTALL a new FRP sensor. REFER to the appropriate Electronic Engine Controls article. Clear the PCM DTCs. REPEAT the self-test.