Question about 1999 Dodge Intrepid

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How do you test the Pcm module? - 1999 Dodge Intrepid

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  • Dodge Master
  • 8,531 Answers

Cannot test without special equipment at the factory. There are certain trouble codes and indications that point to a bad PCM. You can also open a PCM to check for burned components. Why do you want to test yours?

Posted on May 28, 2011

  • rtrujillo036 May 28, 2011

    My car wont start I was thinking it would be the pcm or mabe the igniion coil paks.

  • Jeff Turcotte
    Jeff Turcotte May 28, 2011

    Hi, assuming the engine is turning over, I recommend you check for spark and fuel. These are basic tests to start narrowing down the problem. I would not declare the computer as a problem without strong evidence. If you can run these initial tests and report back results, I can help you with additional troubleshooting steps.

    Please see my tip at http://www.fixya.com/cars/r5821173-doesn... . These are genericinstructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

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1 Answer

I believe I have a loose/dirty electrical connection related to my cruise control on my 2006 Mercury Milan. Where are the connections exterior of the cab that I can check?


You have no idea what's up , all computer controlled ! The cruise control switches are input's to the PCM - engine computer ! There is no pressure sensor near the master cylinder for the CC . The vehicle has ETC - electronic throttle control . Your best bet ,take it to a qualified repair shop.
Here is a web site for free wiring diagrams http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model an engine size . Under system click on engine ,then under subsystem click speed controls . Click the search button ,then the blue links one at a time .
Speed Control The speed control system consists of the following components:
  • Speed control switches
  • Speed control deactivator switch (part of the stoplamp switch)
  • Stoplamp switch
  • Clutch pedal speed control deactivator switch (manual transaxle)
  • Speed control indicator
  • Powertrain control module (PCM)
Principles of Operation
The speed control system is controlled by the powertrain control module (PCM). The speed control system is designed to maintain a selected vehicle speed between 48-200 km/h (30-124 mph). The speed control system is controlled by the steering wheel mounted switches (ON, OFF, SET+, SET- and RESUME), the stoplamp switch, the clutch pedal speed control deactivator switch (manual transaxle), and the speed control deactivator switch (part of the stoplamp switch). The steering wheel mounted switches are hardwired to the PCM through the clockspring.
The speed control functions include:
  • turning the speed control system on.
  • setting and maintaining the desired vehicle speed.
  • accelerating the vehicle speed.
  • decelerating the vehicle speed.
  • turning the vehicle speed control system off.
  • canceling the speed control.
  • Do you know what DTC'S - diagnostic trouble codes are ?
  • Powertrain Control Module (PCM) Diagnostic Trouble Code (DTC) Index DTCs Description Source Action P0500 Vehicle Speed Error PCM REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual. P0579 Cruise Control Multifunction Input A Circuit Range/Performance PCM Go To Pinpoint Test C . P0581 Cruise Control Multifunction Circuit High PCM Go To Pinpoint Test C . P0833 Clutch Pedal Switch B Circuit PCM Go To Pinpoint Test D . P1572 Brake Pedal Switch Circuit PCM Go To Pinpoint Test B . P1703 Brake Switch Out of Self-Test Range PCM Go To Pinpoint Test B . All other DTCs - PCM REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual to continue diagnosis. Symptom Chart
    Symptom Chart Condition Possible Sources Action
    • The speed control is inoperative
    • Stoplamp switch
    • Clutch pedal position (CPP) switch
    • Speed control switch
    • Digital transmission range (TR) sensor
    • Vehicle speed signal
    • Powertrain control module (PCM)
    • Go To Pinpoint Test A .

Jul 24, 2017 | Mercury Cars & Trucks

1 Answer

Need to find fuse control for ford five hundred 2004 cruise control


Do you mean 2005 ? Didn't have five hundred in 2004 !
Speed Control The speed control system consists of the following components:
  • speed control switches
  • speed control deactivator switch
  • speed control indicator
  • powertrain control module (PCM)
  • electronically controlled throttle body
  • clockspring
The speed control system is controlled by the powertrain control module (PCM). The speed control system is designed to maintain a selected vehicle speed between 48 and 200 km/h (30 and 124 mph). The speed control system is controlled by the steering wheel mounted switches (ON, OFF, SET+, SET-, CANCEL, and RESUME), and the brake pedal. The steering wheel mounted switches are hardwired to the PCM.
The speed control functions include:
  • turn the speed control system on
  • set and maintain the desired vehicle speed
  • accelerate the vehicle speed
  • decelerate the vehicle speed
  • resume the prior vehicle speed
  • turn off the vehicle speed control system
  • cancel the speed control
  • Smart junction box (SJB) fuse 18 (10A
  • Powertrain Control Module (PCM) Diagnostic Trouble Code (DTC) Index DTC Description Source Action P0579 Cruise Control Multifunction Input A Circuit Range/Performance PCM Go To Pinpoint Test C . P0581 Cruise Control Multifunction Circuit High PCM Go To Pinpoint Test C . P0720 Output Shaft Speed Circuit Fault PCM REFER to Section 307-01A or Section 307-01B . P0721 Output Shaft Speed Circuit Fault PCM REFER to Section 307-01A or Section 307-01B . P1500 Vehicle Speed Error PCM REFER to Section 307-01A or Section 307-01B . P1501 Vehicle Speed Error PCM REFER to Section 307-01A or Section 307-01B . P1572 Brake On/Off Failure PCM Go To Pinpoint Test B . P1703 Brake On/Off Failure PCM Go To Pinpoint Test B . Highly doubt a fuse problem . Take it to a qualified repair shop.

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Where is the ignition control module located on 4 Ford Taurus 3.8 engine a how do I replace it


Hi Tracie , there is no ignition control module . The PCM controls the coils . You would need to check the red wire going to the coil pack for battery voltage . The other three wires come from the PCM - powertrain control module . With a test light hooked up to battery positive ,touch the other end of the test light to those other three wires one at a time while cranking over the engine . If the test light flickers the PCM is doing what it should be doing . Now if the test light does not flicker you more then likely have a bad crankshaft position sensor. Now would you like to elaborate a little bit on the problem your having ? No start ? no spark at the spark plugs etc..

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My 1995 dodge caravan trys to start but wont im getting no spark to my spark plugs


Hi mate start at the easiest point which will be to check your EARTH to make sure everything is earthed.

Feb 06, 2015 | Dodge Cars & Trucks

1 Answer

Po441


I'm glad to help, below is the diagnostic procedure for the code P0441.


P0441-EVAP PURGE SYSTEM PERFORMANCE

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Evap Purge Monitor tests the integrity of the hoses/tube between the throttle body/intake and the fuel tank. The monitor is a two stage test and runs only after the Evap system passes the small leak test. Stage one is non-intrusive. The Powertrain Control Module (PCM) monitors the purge vapor ratio and the Evaporative System Integrity Monitor (ESIM) Switch closed ratio. If the purge vapor ratio is above a calculated value, the monitor passes. If the ESIM switch closed ratio is greater than calculated value when purge flow is greater than a minimum value, the monitor passes. Stage two is an intrusive test and runs only if stage one does not pass. The PCM commands the purge solenoid to flow at a specified rate to force the purge vapor ratio to update. The ratio is compared to a calibrated specification. If it is less than specified, a one trip failure is recorded. This test can detect if the purge hose is off, obstructed, or the purge valve is not operational.
  1. When Monitored: With the engine running, after the Evap System small leak test has passed.
  2. Set Condition: If the PCM detects that the purge vapor ratio and the ESIM switch closed ratio are below a calculated value, the PCM commands the purge solenoid to flow at a specified rate to update the purge vapor ratio. If the ratio remains below a specified value, a one trip failure is recorded. Two Trip Fault. Three good trips to turn off the MIL.

Possible Causes

EVAP PURGE SOLENOID VACUUM SUPPLY EVAP PURGE HOSE/TUBE OBSTRUCTION EVAP PURGE SOLENOID POWERTRAIN CONTROL MODULE (PCM)
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.
(Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).


1.VEHICLE HISTORY AND SERVICE BULLETIN INVESTIGATION
1. Turn the ignition on. 2. Using the scan tool, read DTCs. Record the related Freeze Frame data if any DTCs are present. 3. Check the following items which may assist in repairing the customer's complaint successfully:
  1. Check the vehicle's repair history. If the vehicle has a repair history that pertains to the customer's current complaint, review the repair.
  2. Inspect the vehicle for any aftermarket accessories that may have been installed incorrectly.
  3. Check for any service bulletin(s) related to the customer's complaint or DTCs. If a service bulletin applies, follow the instructions of the service bulletin.


Choose the following scenario that best applies:

The vehicle inspection or service bulletin repaired the customer's complaint.
  1. Testing complete.

A DTC is present, the vehicle inspection revealed no concerns, no service bulletins apply, or the service bulletin did not repair the customer's complaint.
  1. Go To 2


2.ACTIVE DTC


NOTE: Because a hot vehicle can conceal a potential leak, allow the vehicle to reach ambient temperature before continuing with this procedure.
NOTE: A loose gas cap could caused this DTC to set. Make sure the gas cap is tight and in good condition.
NOTE: If the customer is experiencing an early fuel shut off during the fuel filling process in addition to DTC P0440, P0441, or P0452, check for restrictions in the Evap Purge tubes/hoses as well as the Fresh Air Filter before continuing. 1. Start the engine. 2. Allow the engine to idle. 3. Using the scan tool, perform the ESIM FORCED MONITOR TEST. Allow the test to complete. 4. Using the scan tool, read DTCs.

Is the DTC Active or Pending at this time?

Yes
  1. Go To 3

No
  1. Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  2. Perform the CHECKING FOR AN INTERMITTENT DTC diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).


3.EVAP SYSTEM INSPECTION
Visually and physically Inspect the entire Evaporative Emission System for any of the following conditions:
  1. Holes or cracks
  2. Loose seal points
  3. Damaged or missing components
  4. Incorrect routing of hoses and tubes
  5. Loose or missing Fuel Filler Cap or seal
  6. Damaged locking tabs on the Fuel Filler Cap and/or filler tube
  7. Damaged seal points on the Fuel Filler Cap and/or filler tube


Were any problems found?

Yes
  1. Repair as necessary.
  2. Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

No
  1. Go To 4


4.INSUFFICIENT VACUUM SUPPLY TO THE EVAP PURGE SOLENOID
1. Inspect the Evap Purge Solenoid vacuum supply hose for proper routing and installation. 2. Make sure the vacuum supply hose between the throttle body or intake manifold and the Evap Purge Solenoid is free from any obstructions or blockage. 3. Make sure the vacuum port at the throttle body or intake manifold is free from any obstructions or blockage.

Were any problems found?

Yes
  1. Repair as necessary.
  2. Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

No
  1. Go To 5


5.EVAP PURGE HOSE/TUBE OBSTRUCTION
1. Inspect the Evap Purge hose/tube for proper routing and installation between the Evap Purge Solenoid and the Fuel Tank and between the Fuel Tank and the Evap Purge Canister. 2. Make sure the hose/tube is not damaged or kinked and is free from any obstructions or blockage.

Were any problems found?

Yes
  1. Repair or replace as necessary.
  2. Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

No
  1. Go To 6


6.EVAP PURGE SOLENOID
WARNING: Keep lit cigarettes, sparks, flames, and other ignition sources away from the test area to prevent the ignition of explosive gases. Keep the test area well ventilated. Failure to do so may result in possible serious or fatal injury.

NOTE: After disconnecting the Evap Purge Solenoid vacuum connections, inspect the lines and solenoid for signs of contamination. 1. Disconnect the vacuum hoses at the Evap Purge Solenoid. 2. Using a hand vacuum pump, apply 10 in. Hg. to the "CAN" side of the Evap Purge Solenoid.
NOTE: The solenoid should hold vacuum for a minimum of 15 seconds. 3. Turn the ignition on. 4. Using the scan tool, actuate the Evap Purge Solenoid to the ON position.
NOTE: The vacuum should drop when the solenoid is actuated.

Does the solenoid function as described above?

Yes
  1. Go To 7

No
  1. Verify that there is good pin to terminal contact in the Solenoid and PCM harness connectors. Replace the Evap Purge Solenoid if no problems were found in the connectors.
  2. Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).


7.POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the ESIM Switch and the PCM. 2. Look for any chafed, pierced, pinched, or partially broken wires. 3. Look for broken, bent, pushed out or corroded terminals. 4. Perform any Technical Service Bulletins that may apply.

Were any problems found?

Yes
  1. Repair as necessary.
  2. Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

No
  1. Replace and program the PCM in accordance with the Service Information.
  2. Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

Apr 23, 2014 | 2010 Dodge Journey

1 Answer

Loss of communication with the tcm and pcm


The onboard computer, or Powertrain Control Module (PCM),is the brains of the engine control system, so when the brain is not functioning correctly neither is the engine or anything else that the microprocessor controls - which may include the charging system, transmission, various emission controls and communications with other onboard control modules. Once a diagnosis has been made (and we emphasize the word diagnosis), then and only then should the PCM be replaced.
P0600....Serial Communication Link

P0601....Internal Control Module Memory Check Sum Error

P0602....Control Module Programming Error

P0603....Internal Control Module Keep Alive Memory (KAM) Error

P0604....Internal Control Module Random Access Memory (RAM) Error

P0605....Internal Control Module Read Only Memory (ROM) Error

P0606....ECM/PCM Processor

P0607....Control Module Performance

P0608....Control Module VSS Output 'A'

P0609....Control Module VSS Output 'B'

P0610....Control Module Vehicle Options Error

If you see any of these codes when diagnosing the vehicle with a code reader or scan tool, it may mean the PCM has failed and must be replaced. Additional diagnostic tests will usually be necessary to confirm the problem is really the powertrain control module and NOT something else. Refer to the OEM diagnostic charts for what these tests are. Usually it involves checking certain inputs to the PCM to see if it outputs the correct response. No response or an incorrect response usually means the PCM is defective and needs to be replaced.
All too often, technicians tend to blame that which they understand least. If an engine is not running right and the cause is not obvious, they may blame the computer. Throwing parts at a problem in an attempt to solve it may be good for the parts business, but when a customer brings a PCM back because it failed to fix their problem, nobody wins. Warranty returns on complicated and expensive components like powertrain control modules are an ongoing problem that costs everyone money.
UNNECESSARY POWERTRAIN CONTROL MODULE RETURNS. Over 50 percent of PCMs that are returned under warranty (either because the PCM failed to fix a performance problem or because the engine did not run properly after it was installed) have nothing wrong with them! So it is obvious a lot of people are swapping computers to see if a different PCM will fix their problem.
The trouble with returns is if the PCM has been on the car, you have no way of knowing if it is still "good" or not. Somebody may have crossed up some wires, zapped the PCM with too much voltage or who knows what? The computer needs to be tested and verified before it can go back on the shelf and be sold to somebody else.
Unfortunately, there is no easy way of doing that in a parts store. The PCM has to be hooked up to a sophisticated simulator that exercises all of the computer's input and output circuits to make sure it works correctly - which means the PCM has to go back to the supplier, be retested, and if no fault is found, repackaged and put back into stock.
Be warned, though, that many parts stores have a policy of "no returns or refunds on electronic components."

Mar 20, 2014 | 2005 Lincoln Navigator

1 Answer

I HAVE A 1994 Chevy Truck G 20 Van V8-350 5.7L ...CRANK NO START I AM GETTING FUEL TO THROTTLE BODY BUT not injection into motor. being test wires all day first the fuel pump wouldn't prime so had a...


If the fuel pump does not prime either the PCM is not sending a ground signal to the relay, the relay is bad, or there is an issue with its circuit (no power to relay/blown fuse, short in wires).
Your injectors not spraying may be the ignition module. The module sends a signal to the PCM to let the PCM know the engine is turning and running. If the PCM does not see this signal it may think the engine is not running and when it does not run it does not spray fuel.
Take the module to an autozone to have it tested.

Sep 01, 2011 | Chevrolet G20 Cars & Trucks

1 Answer

Sport trac cruise control works off and on


First thing , knowing what all is involved in the cruise control system helps
Speed Control The speed control system is designed to maintain vehicle speed between 48 and 200 km/h (30 and 125 mph).
Normally, when the brake pedal is applied, the speed control module deactivates the speed control system. Under increased brake pedal effort, the deactivator switch, a normally closed switch, will open and remove power to the speed control actuator clutch, releasing the throttle independently of the speed control module.

Principles of Operation
The brake pedal position (BPP) switch is normally closed to ground. When the brake pedal is applied with the speed control system engaged, the BPP switch closes (to battery voltage), putting the speed control in stand-by mode.
NOTE: A redundant brake deactivator (BPA) switch is provided as an additional safety feature.
NOTE: The speed control module is integral to the powertrain control module (PCM).
The clockspring provides the electrical interface between the steering column wiring and the speed control switches in the steering wheel.
The inputs to the powertrain control module (PCM) required to operate the speed control system are the:
  • anti-lock brake (ABS) module
  • digital transmission range (TR) sensor
  • speed control deactivator switch
  • speed control switches
  • vehicle speed signal (VSS)
The inputs to the speed control actuator come from the powertrain control module (PCM).
The outputs of the speed control actuator go to the speed control cable controlled throttle position sensor.

Special Tool(s) 73III Automotive Meter
105-R0057 or equivalent Worldwide Diagnostic System (WDS)
418-F224,

New Generation STAR (NGS) Tester
418-F052, or equivalent diagnostic tool with appropriate adapter cable
Inspection and Verification
  1. Verify the customer concern.
  1. Verify the speedometer operates correctly without using the speed control by test driving the vehicle. If the speedometer does not operate correctly, refer to Section 413-00 .
  1. Verify the stoplamps operate correctly with the ignition switch in the OFF position. If the stoplamps do not operate correctly, refer to Section 417-01 .
  1. Verify the parking brake is not applied and is operating correctly. If the parking brake is not operating correctly, refer to Section 206-00 .
  1. Visually inspect for obvious signs of mechanical and electrical damage.


Visual Inspection Chart Mechanical Electrical
  • Speed control cable
  • Throttle lever
  • Speed control actuator
  • Battery junction box (BJB) fuse 40 (15A)
  • Circuitry
  • Powertrain control module (PCM)

  1. If the concern remains after the inspection, connect the diagnostic tool to the data link connector (DLC) and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
    • check that the program card is correctly installed.
    • check the connections to the vehicle.
    • check the ignition switch position.
  1. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
  1. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
    • SCP or ISO circuit fault; all electronic control units no response/not equipped, refer to Section 418-00 .
    • No response/not equipped for PCM, Go To Pinpoint Test A .
    • System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out the KOEO Test.
  1. If the DTCs retrieved are related to the concern, go to the Powertrain Control Module (PCM) Diagnostic Trouble Code (DTC) Index to continue diagnostics.
  1. If no DTCs related to the concern are retrieved, proceed to the Symptom Chart to continue diagnostics.
NOTE: DTC P0703 and DTC P1572 must be repaired before any other DTC.

Powertrain Control Module (PCM) Diagnostic Trouble Code (DTC) Index DTCs Description Source Action P0500 Vehicle Speed Error PCM REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual. P1565 Speed Control Command Switches High/Out of Range PCM Go To Pinpoint Test A . P1566 Speed Control Command Switches Low/Out of Range PCM Go To Pinpoint Test B . P1567 Speed Control Output Circuit PCM Go To Pinpoint Test C . P1568 Speed Control Unable to Hold Speed PCM Go To Pinpoint Test D . P1572 Brake On/Off Failure PCM Go To Pinpoint Test E . P0703 Brake Switch Input Malfunction PCM Go To Pinpoint Test E . IF thier are no codes go to the Symptom Chart

Symptom Chart Condition Possible Sources Action
  • No communication with the powertrain control module (PCM)
  • Battery junction box (BJB) fuse(s):
    • 11 (40A)
    • 40 (15A).
  • Circuitry.
  • PCM.
  • REFER to Section 418-00 to continue communication diagnostics.
  • The speed control switch is inoperative - no DTCs
  • Speed control switch.
  • INSTALL a new speed control switch. REFER to Speed Control Switch - With Remote Audio/Climate Controls or Speed Control Switch - Without Remote Audio/Climate Controls in this section.
  • The speed control is inoperative - no DTCs
  • Low battery voltage.
  • Circuitry.
  • Digital transmission range (TR) sensor (automatic transmission only).
  • Parking brake switch.
  • Go To Pinpoint Test F .
  • The speed control indicator lamp is always on
  • Circuitry.
  • Instrument cluster.
  • Powertrain control module (PCM).
  • Go To Pinpoint Test G .

Jul 07, 2017 | 2003 Ford Explorer Sport Trac

1 Answer

Ford 2005 4x4 problem.


2-Speed Torque-On-Demand (TOD) Operation
The automatic 4-wheel drive (A4WD) system is a 2-speed torque-on-demand (TOD) operation that utilizes the following components:
  • Transfer case
  • 4-wheel drive (4WD) control module (integral to the powertrain control module [PCM])
  • Mode select switch (MSS)
  • Gearmotor encoder assembly (part of the transfer case shift motor)
  • Transfer case shift motor
  • Shift motor sense plate (part of the gearmotor encoder assembly)
Principles of Operation
Transfer Case Shift Motor The externally mounted transfer case shift motor, located at the rear of the transfer case, turns the shift cam assembly. As the shift cam assembly turns, it positions the reduction shift fork for desired transfer case operation. An integral position sensor in the shift motor provides shift motor position information to the 4WD control module.
Mode Select Switch (MSS) The push button MSS, mounted on the instrument panel, allows the operator to select the 4x4 Auto, 4x4 High, and 4x4 Low transfer case operating modes. The indicator light, on the instrument cluster push button, will illuminate only when the 4x4 Low position is engaged.
Visual Inspection Chart Mechanical Electrical
  • Axle shafts and CV joints
  • Driveshaft and universal joints
  • Fluid leaks
  • Matching tire sizes
  • Transfer case shift motor
  • Battery junction box (BJB) fuses:
    • 8 (30A)
    • 17 (5A)
    • 18 (20A)
  • Central junction box (CJB) fuses:
    • 12 (5A)
    • 24 (15A)
  • 4x4 module (PCM)
  • Wiring harness
  • Gearmotor encoder contact plate
  • Connector(s)
  • Circuitry
  • Mode indication switch (MSS)

  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  1. If the concern is not visually evident, connect the diagnostic tool to the data link connector and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
    • check that the program card is correctly installed.
    • check the connections to the vehicle.
    • check the ignition switch position.
  1. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
  1. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
    • CAN circuit fault; all electronic control units no response/not equipped, refer to Section 418-00 .
    • No response/not equipped for 4WD module (PCM), Go To Pinpoint Test G .
    • System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out the 4WD module (PCM) self test.
  1. If the DTCs retrieved are related to the concern, go to the 4WD Control Module (PCM) Diagnostic Trouble Code (DTC) Index to continue diagnostics. 4WD Control Module (PCM) Diagnostic Trouble Code (DTC) Index
    DTC Description Source Action B1317 Battery Voltage HIGH 4WD Module (PCM) REFER to Section 414-00 . B1318 Battery Voltage LOW 4WD Module (PCM) REFER to Section 414-00 . B1319 Driver Door Ajar Circuit Failure 4WD Module (PCM) Go To Pinpoint Test M . B1322 Driver Door Ajar Circuit Short To Ground 4WD Module (PCM) Go To Pinpoint Test M . B1342 ECU is Defective 4WD Module (PCM) CLEAR the DTCs. REPEAT the 4x4 module (PCM) self test. If DTC B1342 is retrieved, INSTALL a new 4x4 module (PCM). REFER to Section 303-14 . CLEAR the DTCs. REPEAT the self test. B1483 Brake Pedal Input Circuit Failure 4WD Module (PCM) Go To Pinpoint Test M . B1485 Brake Pedal Input Short to Battery 4WD Module (PCM) Go To Pinpoint Test M . C1729 Transfer Case Unable to Transition Between 4H and 4L 4WD Module (PCM) Go To Pinpoint Test K . C1970 4WD Low Mode Switch LED Short to Battery 4WD Module (PCM) Go To Pinpoint Test K . C1971 4WD Low Mode Switch LED Circuit Failure 4WD Module (PCM) Go To Pinpoint Test K . P1707 Transfer Case NEUTRAL or PARK/NEUTRAL Indication Circuit 4WD Module (PCM) Go To Pinpoint Test M . P1812 Transmission 4-Wheel Drive Mode Select Circuit Failure 4WD Module (PCM) Go To Pinpoint Test K . P1815 Transmission 4-Wheel Drive Mode Select Short Circuit to Ground 4WD Module (PCM) Go To Pinpoint Test K . P1816 Transmission NEUTRAL Safety Switch Circuit Failure 4WD Module (PCM) Go To Pinpoint Test M . P1819 Transmission NEUTRAL Safety Switch Circuit Short to Ground 4WD Module (PCM) Go To Pinpoint Test M . P1820 Transfer Case Clockwise Shift Relay Coil Circuit Failure 4WD Module (PCM) Go To Pinpoint Test K . P1822 Transfer Case Clockwise Shift Relay Coil Circuit Short To Battery 4WD Module (PCM) Go To Pinpoint Test K . P1824 4-Wheel Drive Clutch Relay Circuit Failure 4WD Module (PCM) Go To Pinpoint Test H . P1826 4-Wheel Drive Low Clutch Relay Short Circuit to Battery 4WD Module (PCM) Go To Pinpoint Test H . P1827 4-Wheel Drive Low Clutch Relay Short Circuit to Ground 4WD Module (PCM) Go To Pinpoint Test H . P1828 Transfer Case Counterclockwise Shift Relay Coil Circuit Failure 4WD Module (PCM) Go To Pinpoint Test K . P1830 Transfer Case Counterclockwise Shift Relay Coil Circuit Short To Battery 4WD Module (PCM) Go To Pinpoint Test K . P1849 Transfer Case Contact Plate A Short Circuit to Ground 4WD Module (PCM) Go To Pinpoint Test K . P1853 Transfer Case Contact Plate B Short Circuit to Ground 4WD Module (PCM) Go To Pinpoint Test K . P1857 Transfer Case Contact Plate C Short Circuit to Ground 4WD Module (PCM) Go To Pinpoint Test K . P1861 Transfer Case Contact Plate D Short Circuit to Ground 4WD Module (PCM) Go To Pinpoint Test K . P1867 Transfer Case Contact Plate General Circuit Failure 4WD Module (PCM) Go To Pinpoint Test K . P1891 Transfer Case Contact Plate Ground Return Open Circuit 4WD Module (PCM) Go To Pinpoint Test K . U1900 CAN Communication BUS Fault 4WD Module (PCM) REFER to Section 418-00 . U2023 External Node Fault 4WD Module (PCM) REFER to Section 418-00 . U2051 One Or More Calibration Files Missing/Corrupt 4WD Module (PCM) Reprogram/Reflash the 4x4 module. REFER to Section 418-00 . - For All Other DTCs 4WD Module (PCM) REFER to Section 418-00 .
  2. Your best bet mite be to take it to a qualified repair shop !

May 30, 2017 | 2005 Ford Explorer

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