2002 Ford Ranger 3.0 no crank, no start.


Asked by Sep 29, 2016 at 05:05 AM about the 2002 Ford Ranger 4 Dr XLT FX4 4WD Extended Cab SB

Question type: Maintenance & Repair

No crank,all lights work. theft light blinks every 2seconds in start mode and in
key off mode. Pcm diode was bad,replaced it. Put wire across starter relay
connection 30 to 85 and starter worked without key on. OBII will not read. Says
failure to read. Replaced ignition switch. Still nothing. All fuses and relays that
have to do with starting and PCM are good. Key is the only one we ever had. Is
there an anti theft module? Don't know where to go from here. Also, I have
replaced neutral switch. I do have power on one side of pcm diode when key is
on. I have power to pin 30 on starter relay. Can I bypass anti theft module.

3 Answers


Antitheft and Alarm Systems: Description and Operation ANTI-THEFT The passive anti-theft system (PATS) uses radio frequency identification technology to deter a driveaway theft. Passive means that it does not require any activity from the user. The PATS uses a specially encoded ignition key. Each encoded ignition key contains a permanently installed electronic device called a transponder. Each transponder contains a unique electronic identification code, with over 72 million billion combinations. Each encoded ignition key must be programmed into the vehicle powertrain control module (PCM) before it can be used to start the engine. There are special diagnostic procedures that must be carried out if new encoded ignition keys are to be configured. The encoded key is larger than a traditional ignition key. The key does not require batteries and should last the life of the vehicle. The transceiver module communicates with the encoded ignition key. This module is located behind the steering column shroud and contains an antenna connected to a small electronic module. During each vehicle start sequence, the transceiver module reads the encoded ignition key identification code and sends the data to the PCM. The control functions are contained in the PCM. This module carries out all of the PATS functions such as receiving the identification code from the encoded ignition key and controlling engine enable. The PCM initiates the key interrogation sequence when the vehicle ignition switch is turned to ON or START. The PATS function uses the PCM to enable or disable the engine. All elements of PATS must be functional before the engine is allowed to start. If any of the components are not working correctly, the vehicle will not start. PATS uses a visual theft indicator located on top of the instrument panel. This indicator will prove out for three seconds when the ignition switch is turned to ON or START under normal operation. If there is a PATS problem, this indicator will either flash rapidly or glow steadily (for more than three seconds) when the ignition switch is turned to ON or START. PATS also "flashes" the theft indicator every two seconds at ignition OFF to act as a visual theft deterrent. The PATS is not compatible with aftermarket remote start systems, which allow the vehicle to be started from outside the vehicle. These systems may reduce the vehicle security level, and also may cause no-start issues. Remote start systems must be removed before investigation of PATS-related no-start issues. The PATs key is used on the following Ford family trucks and suvs: FORD: 1996-2001 MUSTANG, TAURUS 1998-2000 CONTOUR 1998-2001 CROWN VICTORIA 2000-2001 FOCUS 2002 THUNDERBIRD 1997-2001 EXPEDITION 1998-2002 EXPLORER 1999 F-250 LD 1999-2001 F-150, RANGER, WINDSTAR 2000-2001 EXCURSION 2001 ESCAPE LINCOLN: 1997-1998 MARK VIII 1998-2001 CONTINENTAL, TOWN CAR 2000-2001 LS 1998-2001 NAVIGATOR 2002 BLACKWOOD MERCURY: 1996-2001 SABLE 1998-2000 MYSTIQUE 1998-2001 GRAND MARQUIS 1999-2001 COUGAR 1998-2002 MOUNTAINEER Additionally, PATs can be found on the follow Ford family cars and mini-vans: 1998-up Contour 1997-up Crown Victoria 1999-up Escort 2000-up Focus 1996-up Mustang and Taurus 1998-up Windstar 1998-up 2000-up Lincoln LS 1998-up Lincoln Mark VIII, Lincoln Continental and Lincoln Town Car 1997-up Mercury Grand Marquis 1998-up Mercury Mystique 1996-up Mercury Sable Following are the instructions for programming a blank key (you must have at least one working key for this procedure). The PAT 1. Make sure you have both keys. 2. Turn on car but don't start. Watch "theft" indicator untils it goes out. 3. Turn off and repeat procedure with second key. 4. After "theft light goes out, insert new key and turn on. 5. Wait until the theft indicator goes off and then turn off switch. 6. Wait thirty seconds. New key is now programmed into security module. Repeat for any other keys. 1. Erase any old codes by entering the factory code.(buttons will light up) 2. Press 1/2 button within 5 seconds. 3. Press 7/8 and 9/0 buttons at the same time within 5 seconds. To set new code: 1. Enter factory code (numbers will light up) 2. Press 1/2 button within 5 seconds. 3. Enter personal 5 digit code(decide beforehand) within 5 seconds of each previous one. To unlock all the doors,press the 3/4 button within 5 seconds of the driver door unlocking. To lock all doors and set alarm system,press 7/8 and 9/0 at the same time. To disarm or reset a triggered alarm,just enter personal or factory code. Do not set a code with five of the same consecutive numbers. It's too easy for thieves to figure out. Deactivating and Activating Autolock To deactivate the "autolock": With all doors and tailgate closed but NOT locked,and ignition OFF. 1. Enter 5 digit code 2. While holding 7/8 button in, press and release the 3/4 button. 3. Release 7/8 button The horn will chirp once if the "autolock" was deactivated or two times if "autolock" was activated. To reactivate the system,repeat steps 1 thru 3 Alternate Method To Deactivate And Activate Autolock Do steps [1] through [5] (below) within 30 seconds or you'll have to do it over. If you have to do it over, wait 30 seconds between attempts. Close all doors securely. 1.Turn the ignition key to ON. 2.Press the power door UNLOCK control THREE times. 3.Turn the ignition key from ON to OFF. 4.Press the power door UNLOCK control THREE times. 5.Turn the ignition key back to ON .The doors should lock and unlock. 6.Press the power door UNLOCK control. The horn should chirp ONCE to confirm successful switching of the autolock system Troubleshooting: The engine does not start and LED remains off. 1. Check PATS system fuses 2. If alarm is fitted check if LED functions for alarm: if not check cigar lighter fuse (also used for LED) 3. If not go to main dealer Engine does not start: LED flashes rapidly Leave ignition on until the LED starts to flash a 2 digit code: (sequence- pause-sequence) Check the following codes: Code flashes: 1:3 Key code not received. Is key screened by other keys or objects? Try different key: if okay then first key is faulty. If not go to main dealer 1:4 Partial code only received. Try again. If not okay use different key. If not go to main dealer 1:5 Key not programmed into PATS. Program key as above using master 1:6 Faulty link between PATS module and EECV Go to dealer . For more information and troubleshooting tips: PATS-Troubleshooting-DIAGNOSTIC-Service-Tips and: Programming Ford-PATS

8 people found this helpful.

Thanks, Joemom did find the problem!!! I took the engine compartment fuse box out and underneath it was a corroded yellow/black wire going to the pcm relay. I pulled the pin out and got a new pin at NAPA for $2.00. started right up!!! Yea!!!

4 people found this helpful.

Hi COMETGUY61 is there a way to contact you? I bought a 2003 Ford Ranger from a client that only had 50,000 miles but wouldn't start. We now think it needs a replacement PATS system yet I can't find one anywhere. Could we purchase and successfully use on of those PATS disabler systems? My stepbrother, who works on vehicles on the side, changed lots of parts to get it running and running well, but now he says it will only start once and then not start again and we've used both keys. I was wondering if you could assist us. My email is lovinglsufootball@gmail.com if you would be willing to help us and I can send you a contact number. Thanks in advance

6 people found this helpful.

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