Test Procedure

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2022 Ford F-550 Super Duty, 2022 Ford F-450 Super Duty, 2022 Ford F-350 Super Duty, 2022 Ford F-250 Super Duty, and 2021 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

FB1 PRELIMINARY DIAGNOSIS

NOTE: Diagnose circuit DTCs before range or performance DTCs.

Are DTCs P007B, P007C, P007D, P007E or P026A present?

Yes	No
GO to FB2.	RETURN to SYMPTOM CHARTS for further direction.

FB2 CHECK FOR AN OPEN

Ignition OFF.
CACT Sensor connector disconnected.
For Transit Connect,
PCM-E connector disconnected.

Measure the resistance between:

(+) MAP/CACT Sensor Connector, Harness Side	(-) PCM-E Connector, Harness Side
CACT - Pin 3	CACT
SIGRTN - Pin 4	SIGRTN

For all others,
PCM-E connector disconnected.
Measure the resistance between:

(+) CACT Sensor Connector, Harness Side	(-) PCM-E Connector, Harness Side
CACT - Pin 1	CACT
SIGRTN - Pin 2	SIGRTN

Are the resistances less than 5 ohms?

Yes	No
GO to FB3.	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

FB3 CHECK FOR A SHORT BETWEEN CIRCUITS

For Transit Connect,

Measure the resistance between:

(+) MAP/CACT Sensor Connector, Harness Side	(-)
CACT - Pin 3	Ground
SIGRTN - Pin 4	Ground

Measure the resistance between:

(+) MAP/CACT Sensor Connector, Harness Side	(-) MAP/CACT Sensor Connector, Harness Side
CACT - Pin 3	SIGRTN - Pin 4

For all others,

Measure the resistance between:

(+) CACT Sensor Connector, Harness Side	(-)
CACT - Pin 1	Ground
SIGRTN - Pin 2	Ground

Measure the resistance between:

(+) CACT Sensor Connector, Harness Side	(-) CACT Sensor Connector, Harness Side
CACT - Pin 1	SIGRTN - Pin 2

Are the resistances greater than 10K ohms?

Yes	No
GO to FB4.	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

FB4 CHECK FOR A SHORT TO VOLTAGE

Ignition ON, engine OFF.
For Transit Connect,

Measure the voltage between:

(+) MAP/CACT Sensor Connector, Harness Side	(-)
CACT - Pin 3	Ground

For all others,
Measure the voltage between:

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

Is any voltage present?

Yes	No
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.	GO to FB5.

FB5 INTERMITTENT CHECK

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

Is a concern present?

Yes	No
REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test.	GO to FB6.

FB6 TEMPERATURE SENSOR CORRELATION

NOTE: Check temperature values while engine is at ambient temperature, cold soak the engine for a minimum of 8 hours if necessary.

NOTE: All PIDs may not be available on all vehicles.

Ignition ON, engine OFF.
Access the PCM and monitor the AAT (TEMP), CAC_T (TEMP), IAT11 (TEMP), ECT2_1 (TEMP), EGRTC (TEMP), IAT (TEMP) and EGRTA (TEMP) PIDs.
The CAC_T temperature must be within the following ranges:
- Within 10°C (18°F) degrees of the AAT reading
- Within 16°C (28.8°F) degrees of the IAT11 reading
- Within 20°C (36°F) degrees of the ECT2_1 reading
- Within 19°C (34.2°F) degrees of the EGRTC reading

Is the CAC_T PID within specification?

Yes	No
GO to FB7.	INSTALL a new CACT sensor. Clear the PCM DTCs. REPEAT the self-test.

FB7 CHECK THE CHARGE AIR COOLER (CAC) SYSTEM

NOTE: Visually inspect the vehicle for aftermarket accessories and performance modifications (exhaust system, turbocharger, performance chip). Refer to ENGINE CONTROL (EC) SYSTEM , Modifications to OBD Vehicles.

Check the CAC system for low fluid level, cracked, restricted or misrouted coolant lines, cracked or restricted heat exchanger.
Check the charge air cooler (CAC) and intake air systems for leaks and restrictions.

Are any concerns present?

Yes	No
REPAIR or INSTALL a new component as necessary. Clear the PCM DTCs. REPEAT the self-test.	For DTCs P026A or P007E, GO to PINPOINT TEST ZZ . For all others, INSTALL a new CACT sensor. REFER to the appropriate Electronic Engine Controls article. Clear the PCM DTCs. REPEAT the self-test.