How To Read Ecu Error Codes
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under normal driving conditions. One of these lights reads 'check engine.' This light comes on when the ECU detects a fault in one of the many electronic components from which how to read engine codes without a reader it receives signals and to which it transmits signals. If the ECU recognizes a problem
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while the car is on, the 'check engine' light will be constantly illuminated. If it has detected a problem in the past, but car diagnostic codes list the problem which it detected no longer exists, the light will be out. However, the ECU will store a record of the faults it has detected in the past until they are cleared deliberately or unintentionally. To check engine light codes list read any current or past faults, the 'check engine' light will flash in a sort of Morse code, which we can decipher. Underneath the steering column is a wide rectangular piece of plastic, the same color as the dash, which has a tray marked 'TRAY.' This large piece is held to the underside of the dash with a bunch of screws. Remove these screws and remove the plastic piece. Now there will be
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a bunch of wires for you to see. To the left of the steering column (at least in left hand drive cars) somewhere probably tucked away will be a bundle of wires with two pairs of electrical connectors which are disconnected. One is black and connects one wire to one wire, the other is green and roughly 'T' shaped, this one also connects one wire to one wire. With the car turned completely off, connect the black connector. Next, turn the ignition to 'ON' but do not start the car. The idiot lights in the dash will come on, and some may go out after a few moments. Watch the 'check engine' light and maybe have something you can write on to remember the codes. If there is a fault code in the ECU, the 'check engine' light will begin to flash in a particular manner. The codes range in number from 11 to 52, so we know that they all will be two digits. To signify the tens place of the number, the 'check engine' light will flash a long (1.2 seconds) flash. The single digit will be a short (.2 seconds) flash. Each flash within the same code will be separated by .3 seconds. Each error code will be separated by 1.8 seconds. Don't bother trying to time all these,
14 EC-101 Ignition Signal Primary 21 EC-105 IACV-AAC Valve 25 EC-110 ECM 31 EC-115 EGR System 32 EC-117 Front O2 Sensor 33 EC-125 Knock Sensor 34 EC-130 EGR Temp Sensor 35 EC-133 how to get check engine light codes without scanner toyota EGRC-BPT Valve 36 EC-137 Closed Loop 37 EC-139 Intake Air Temp Sensor 41 EC-140 vehicle diagnostic code reader Throttle Position Sensor 43 EC-145 CYL 4 Misfire 65 EC-150 CYL 3 Misfire 66 EC-150 CYL 2 Misfire 67 EC-150 CYL 1 Misfire
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68 EC-150 Random Misfire 71 EC-150 TW Catylist System 72 EC-154 Fuel Injection System 76 EC-157 Rear O2 Sensor 77 EC-162 Crank Position Sensor (OBD) 82 EC-167 A/T Diag Comm Line 84 EC-171 Crank P/S (OBD) Cog http://legacycentral.org/library/literature/codes.htm 95 EC-174 Coolant Temperature Sensor 98 EC-178 Park/Neutral Position Switch 103 EC-183 EGRC Solenoid/V 105 EC-188 Inhibitor Switch 111 AT Vehicle Speed Sensor A/T 112 AT A/T 1st Signal 113 AT A/T 2nd Signal 114 AT A/T 3rd Signal 115 AT A/T 4th Signal or TCC 116 AT Shift Solenoid/V A 118 AT Shift Solenoid/V B 121 AT Overrun Clutch S/V 123 AT TOR Conv clutch SV 124 AT Line Pressure S/V 125 AT Throttle http://www.240sx.org/faq/articles/ecm_codes_doch.htm Position Sensor A/T 126 AT Engine Speed Signal 127 AT Fluid Temp Sensor 128 AT A/T Comm Line XX EC-192 Many thanks to Richard Lestage who posted his version for the SOHC! We've used his format for the DOHC and thank him for his efforts!! We suggest that you read this in it's entirety before rolling up your sleeves and doing this procedure. It may seem a bit complicated at first, but when you understand how the ECU stores and displays the Malfunction Codes, you will find that the process is pretty simple and easy to do. Only a screw driver is required to read the trouble codes stored in the ECU (Electronic Control Unit). The following instructions allow you to easily read and erase the Malfunction Code on your beloved's ECU. These instructions come from the 1991- 16 Valve Factory Service Manual. Reading the codes requires accessing the ECU and placing the unit in one of two self diagnostic modes using a small flat head screw driver. The codes are displayed by a single RED L.E.D. in the ECU and the Check Engine Light. 1. Accessing to the ECU
The ECU is located at the right of the right side footwell. The "side" is determined as you sit in the car facing forward. (For cars in North America, the right sideSearch Forums Show Threads Show Posts Advanced Search View all threads started by youView all your posts Find All Thanked Posts Go to Page... Page 1 of 4 1 23 > Last » Thread Tools Display Modes 03-03-2011, 09:46 PM #1 drgbdy I'D Bag It http://www.infamousnissan.com/forum/showthread.php?t=14573 Join Date: Feb 2011 Location: Virginia Age: 34 Posts: 11 Vehicle: Needs A Project Thanks: 0 Thanked 8 Times in 1 Post How to pull ECU error codes: 87-95 Hardbody/Pathfinder. How to pull ECU error codes for 87-95 Pathfinders and Hardbody pickups: The http://www.totalcardiagnostics.com/support/Knowledgebase/Article/View/21/0/complete-list-of-obd-codes-generic-obd2-obdii--manufacturer ECU is under your passenger's side seat. You can gain access to it by simply sliding the seat all the way forward and removing the plastic cover from the ECU. You can also remove the seat if you want, it makes access how to a little easier. The VG30i ECU's have a tiny toggle switch on the side of the ECU with a small snap-in switch cover that must be utilized to select the diagnostic mode of the ECU. The 4-cylinder ECU and the VG30E ECU has a slotted switch that turns 1/4 or 1/2 turn clockwise and counterclockwise to do the same task. Some early 4-cyl HB ECU's have the switch as well. In any case it will have one or the other. For 4-cylinder: 1. Turn the ignition how to read switch on, but do not start the engine. All of the lights in the dash should be on. 2. Turn the 'diagnostic mode selector' screw on the ECU fully clockwise. The check engine light will go out. Wait 5 seconds, then turn the screw fully counter clockwise. 3. The check engine light will then begin to flash the trouble code. (number of long flashes is the 1st digit, number of short flashes is the 2nd digit) 4. To clear all stored codes and turn the check engine light off, turn the screw fully clockwise while it is in diagnostic mode. Wait 5 seconds, then turn the screw fully counter clockwise. 5. To keep the codes stored, simply turn the key off as the check engine light is flashing and the ECU will keep all stored codes and the check engine light will remain on. For V6: 1. Turn the ignition switch on, but do not start the engine. All of the lights in the dash should be on. 2. For VG30i: There is a little plastic tab you pull off of the side of the ECU(facing the door). A small toggle switch is behind it with 2 positions, "ON" and "DIAGNOSTICS". Using a small screwdriver or tool, move it to the diagnostics position. The red and green LED's on top of the ECU will blink simultaneously. One time, pause, then 2 times, three times, pause...so on for each mode, 1 through 5. Mode 3 is the most commonly used mode and will yield the ECU troub
by Alex (Im) E. on 29 January 2013 07:25 PM What is a Diagnostic Trouble Code (DTC)? Diagnostic trouble codes (or fault codes) are codes that are stored by the on-board computer diagnostic system. These are stored in response to a problem found in the car by the system. These codes are stored when a sensor in the car reports a reading that is outside the normal/accepted range (Eg: fuel mixture too rich). The codes identify a particular problem area and are intended to provide the technician with a guide as to where a fault might be occurring within a car. The codes should be used in conjunction with the vehicle's service manual to discover which systems, circuits or components should be tested to fully diagnose the fault. Caution when Relying Only on Diagnostic Trouble Codes... Parts or components should not be replaced with reference to only a DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing. For example, if a DTC reports a sensor fault, replacement of the sensor is unlikely to resolve the underlying problem. The fault is most likely to be caused by the systems that the sensor is monitoring, but might even be caused by the wiring to the sensor itself. DTCs may also be triggered by faults earlier down the line. For example, a dirty MAF sensor might be causing the car to overcompensate in its fuel-trim adjustments. As a result, oxygen sensors are likely to report fuel mixture problems. So to avoid unpredictable hazards when fixing a vehicle based on it's DTC codes -- make sure you get a reliable OBD2 reader that'll thoroughly scan the vehicle for faults beyond traditional DTC codes. Explanation of Codes... This page lists 5,000+ generic OBD2 Diagnostic Trouble Codes. You can also access the database by downloading the printable offline version (ideal for auto mechanics). If your vehicles code is not found on this page, then downloaded our