Test Procedure

WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

E1 PRELIMINARY DIAGNOSIS

Is DTC P0107 or P0108 present?

Yes	No
GO to E2.	For symptoms without DTCs, GO to E7. For all others, GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS .

E2 CHECK FOR VOLTAGE AT THE SENSOR

Ignition OFF.
MAP Sensor connector disconnected.
Ignition ON, engine OFF.

Measure the voltage between:

(+) MAP Sensor Connector, Harness Side	(-) MAP Sensor Connector, Harness Side
VREF - Pin 3	SIGRTN - Pin 1

Is the voltage between 4.5 - 5.5 V?

Yes	No
GO to E3.	GO to Pinpoint Test B .

E3 CHECK FOR AN OPEN IN THE HARNESS

Ignition OFF.
PCM-E connector disconnected.

Measure the resistance between:

(+) MAP Sensor Connector, Harness Side	(-) PCM-E Connector, Harness Side
MAP - Pin 2	MAP - Pin 59

Is the resistance less than 5 ohms?

Yes	No
GO to E4.	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

E4 CHECK FOR A SHORT BETWEEN CIRCUITS IN THE HARNESS

Measure the resistance between:

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

Measure the resistance between:

(+) MAP Sensor Connector, Harness Side	(-) MAP Sensor Connector, Harness Side
MAP - Pin 2	VREF - Pin 3
MAP - Pin 2	SIGRTN - Pin 1

Are the resistances greater than 10K ohms?

Yes	No
GO to E5.	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

E5 CHECK FOR A SHORT TO VOLTAGE IN THE HARNESS

Ignition ON, engine OFF.

Measure the voltage between:

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

Is any voltage present?

Yes	No
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.	GO to E6.

E6 INTERMITTENT CHECK

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

Is a concern present?

Yes	No
REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test.	INSTALL a new MAP sensor. REFER to the appropriate Electronic Engine Controls article. Clear the PCM DTCs. REPEAT the self-test. If the concern or DTC is still present, GO to E8.

E7 CHECK THE SENSOR FOR BIAS

Ignition ON, engine OFF.
Access the PCM and monitor the BARO (PRESS), EBP (PRESS) and MAP_A (PRESS) PIDs.

Is the MAP_A PID value within 4.5 kPa (0.65 psi) of the EBP and BARO PID values?

Yes	No
REMOVE and CHECK the MAP sensor for moisture, ice or any other type of restriction. REPAIR as necessary. REFER to SYMPTOM CHARTS , if a driveability concern exists.	INSTALL a new MAP sensor. REFER to the appropriate Electronic Engine Controls article. Clear the PCM DTCs. REPEAT the self-test.

E8 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.