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2003ford explorer c1440

C1440 code what does this mean

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Posted on Jan 02, 2017

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SOURCE: 2003ford explorer door locks unlock codes

The code is printed (I think on a sticker type material) on the face of the vehicles computer. 2002 through 2007 the computer is in the right panel behind the middle row window. It is below the seat belt mechanism. You have to pull out the top plastic panel off, then loosen the lower panel to be able to see the face of the computer module. The code is on a sticker on the face of the module.

Posted on Sep 22, 2011

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Problem code c1440on 2003 ford explorer


C1440 Pressure Transducer Input Circuit Failure YES
C1440 (ABS only) Pressure Transducer Input Circuit Failure ABS Module Go To Pinpoint Test P .
Normal Operation The brake pressure switch provides an additional speed control deactivation if the brake pedal position (BPP) switch fails. When the brake pedal is pressed, 1700 kPa (246 psi) of brake fluid pressure in the brake master cylinder opens the brake pressure switch, removing B+ voltage to the speed control servo electric clutch.
    Possible Causes
  • circuit 10 (LG) open
  • circuit 307 (BK/YE) open, short to power
  • ABS module
  • brake pressure switch
  • speed control deactivator switch
PINPOINT TEST P: DTC C1440 (ABS ONLY) - PRESSURE TRANSDUCER SIGNAL FAULT CAUTION: Use the flex probe kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.
Test Step Result / Action to Take P1 VERIFY THE DTC
  • Connect the diagnostic tool.
  • Key in ON position.
  • Clear DTC C1440. Road test the vehicle. Repeat the self-test.
  • Does DTC C1440 repeat?
Yes
GO to P2 .

No
The system is OK at this time. P2 MONITOR THE BRAKE PRESSURE SWITCH PID FOR CLOSED POSITION
  • Enter the following diagnostic mode on the diagnostic tool: ABS Module PID.
  • Monitor the powertrain control module (PCM) brake pressure switch PID.
  • With foot off the brake pedal, does the PID read closed?
Yes
GO to P3 .

No
GO to P4 . P3 MONITOR THE BRAKE PRESSURE SWITCH PID FOR OPEN POSITION
  • Enter the following diagnostic mode on the diagnostic tool: ABS Module PID.
  • Monitor the PCM brake pressure switch PID.
  • While pressing the brake pedal, does the PID read open?
Yes
GO to P9

No
GO to P7 . P4 CHECK THE CIRCUIT 10 (LG/RD) FOR AN OPEN
  • Key in OFF position.
  • Disconnect: Speed Control Deactivator Switch C1025.
  • Key in ON position.
  • Measure the voltage between the brake pressure switch C1025-2, circuit 10 (LG/RD), harness side and ground.
  • Is the voltage greater than 10 volts?
Yes
GO to P5 .

No
REPAIR the circuit. CLEAR the DTCs and REPEAT the self-test. P5 CHECK THE BRAKE PRESSURE SWITCH
  • Key in OFF position.
  • Measure the resistance across the brake pressure switch pins, component side.
  • Is the resistance less than 5 ohms?
Yes
GO to P6 .

No
INSTALL a new speed control deactivator switch. REFER to Section 310-03 . CLEAR the DTCs. REPEAT the self-test. P6 CHECK CIRCUIT 307 (BK/YE) FOR AN OPEN
  • Connect: Speed Control Deactivator Switch C1025.
  • Disconnect: ABS Module C155.
  • Measure the voltage between the ABS module C155-40, circuit 307 (BK/YE). harness side and ground.
  • Is the voltage greater than 10 volts?
Yes
GO to P9

No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. P7 CHECK CIRCUIT 307 (BK/YE) FOR A SHORT TO POWER
  • Key in OFF position.
  • Disconnect: Brake Pressure Switch C1025.
  • Key in ON position.
  • Measure the voltage between the ABS module C155-40, circuit 307 (BK/YE), harness side and ground.
  • Is any voltage present?
Yes
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

No
GO to P8 . P8 CHECK BRAKE PRESSURE SWITCH
  • Start the engine.
  • Measure the resistance between the brake pressure switch C1025 pin 1, component side and the brake pressure switch C1025 pin 2, component side while firmly pressing the brake pedal.
  • Is the resistance greater than 10,000 ohms?
Yes
GO to P9 .

No
INSTALL a new speed control deactivator switch. REFER to Section 310-03 . CLEAR the DTCs. REPEAT the self-test. P9 CHECK FOR CORRECT ABS MODULE OPERATION
  • Disconnect all ABS connectors.
  • Check for:
    • corrosion
    • pushed-out pins
  • Connect all ABS connectors and make sure they seat correctly.
  • Operate the system and verify the concern is still present.
  • Is the concern still present?
Yes
INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this section. TEST the system for normal operation.

No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

Jul 01, 2017 | Ford Cars & Trucks

1 Answer

Bought tool 60794 and need problem code c1440 explained to me for 2003 ford explorer


Just follow the diagnostic flow chart in the shop manual. Way too much to ask us to type it all out for you.

Jul 01, 2017 | Ford Cars & Trucks

1 Answer

How to change the intake air temp sensor for a 2003ford expedition xlt


Part of the MAF Sensor

You change no parts until they are tested
& fail a test,why would you,codes have nothing
to do with parts replacement

Have to find a problem & the cause

Sep 07, 2014 | 2003 Ford Expedition

1 Answer

Code Meaning c1440


WHAT IS THE VEHICLE??

Jun 24, 2013 | Cars & Trucks

1 Answer

2003Ford Explorer remote entry fobs booth stopped working yet batteries in them are good.


You can test the output of the Fobs at many Autoparts stores. They have one tester, usually on their counter and it usually has replacement batteries around it.

It sounds more like the receiver for the Keyless has shut down. But you may have a Menu problem on some cars. The Electronic dash Menu is where you can select the different features like "silent mode" door chimes, etc. Sometimes these get messed up when someone tries to reset the Oil change interval counter, then pushes the wrong button.

I hope my solution helps.

Oct 17, 2012 | Cars & Trucks

1 Answer

2003ford explorer door locks unlock codes


The code is printed (I think on a sticker type material) on the face of the vehicles computer. 2002 through 2007 the computer is in the right panel behind the middle row window. It is below the seat belt mechanism. You have to pull out the top plastic panel off, then loosen the lower panel to be able to see the face of the computer module. The code is on a sticker on the face of the module.

Sep 22, 2011 | 2003 Ford Explorer

1 Answer

ABS light staying on, lost my cruise control, overdrive shut off going down the highway a couple of times, and not shifting right when going 55-60 on the highway when shifting into 5th gear i.m guessing....


its the solonoids on the solonoid block, 3 of them are sticking, there is alot of videos on what to do,on you tube, very common problem, mine runs and shifts great now

Aug 09, 2017 | 2003 Ford Explorer

1 Answer

My 2003ford explorer will not start but my truck is getting spark to it would the problem be my timing belt or would it be my fuel pump


The coolant temp sensor is responsible for starting fuel mix. As far as the fuel filter is in question, go ahead and change it. Good Luck-Ned-

Oct 07, 2009 | 2003 Ford Explorer

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