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How To Pull CEL, D4, SRS, and ABS Codes (with Code Lists)
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Abbreviations
CEL = Check Engine Light in gauge cluster D4 = Automatic transmission D4 light in gauge cluster SRS = Supplemental Restraint System (Airbags) light in gauge cluster ABS = Anti-Lock Brake System light in gauge cluster OBD = OnBoard Diagnostics system (92-95 OBD1; 96-00 OBD2) ECU = Electronic Control Unit (car's computer) ------------------------------------------------------------- Table of Contents: Post 1
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********************************************** ********************************************** ********************************************** Post 1 How to pull OBD1 CEL codes at home in five easy steps (This method applies to OBD1 92-95 Civics and Del Sols and OBD2 96-00 Civics and 96-97 Del Sols.) Does the CEL in your gauge cluster remain on steady while driving or when the key is in ON(II)? If so, your ECU has detected a problem and has stored it as a malfunction code. Attachment 496187 Don't just reset the ecu, done by removing the 7.5A hood Back Up fuse for 3 minutes (see diagrams below). Sure, this will clear the code temporarily but you're not finding out what's wrong with your car. Instead, first retrieve the CEL code(s) to see what the problem may be. Described below is how to retrieve CEL codes at home without driving to a mechanic, auto parts store, or the Honda dealer. CEL codes recovered by this method are defined in a list at the end of this post. ---------------------------------------------------------------------------------------------- Five Easy to Follow Steps: 1) Get a CEL https://honda-tech.com/forums/images...s/emsmilep.gif https://i17.photobucket.com/albums/b...ydogg/1CEL.jpg 2) On the passenger side, remove the kick panel at the floor. Behind it is your ecu and a jumper plug (aka the service connector). Attachment 496188 92-95 Civics: Attachment 496189 96-00 Civics: Attachment 496190 3) Locate the jumper plug (Civic 92-93 is gray; Civic 94-00 is blue). It's a 2-pin/wire plug. For the 94-00 Civics, this plug has 1 Brown wire and 1 Black wire. Attachment 496191 For 92-93 Civics, there is 1 Brown wire and 1 Green with White stripe wire. Attachment 496192 4) With the key OFF, insert either a 2-pin connector clip or a loop of wire (e.g., a paper clip) into both holes on the connector. 5) Back in the driver's seat, turn the key to the ON(II) position. The CEL will come on like normal but will then begin to flash. **By counting the number of flashes, you can decipher the CEL code** A LONG flash (1 second) is 10 A SHORT flash (0.5 second) is 1 For example, two long flashes followed quickly by two short flashes would be code 22. If there is more than one code, each code will be separated by a 2.5 second gap. Attachment 496193 6) Now that you have pulled the CEL codes, clear them by resetting the ECU (see Tip #3 below). ------------------------------------------------------------------------------------------------------------------- HELPFUL TIPS Tip #1: Does my CEL work? To know whether your CEL works, turn the key from off to the ON(II) position. The CEL should turn on and then off after 2 seconds. If the CEL never turns on, this could mean that the CEL bulb in the cluster is blown, a CEL wire is bad, or a previous owner has removed the CEL bulb to mask a problem that would have hindered sale of the car. Tip #2: How do I verify that no CEL codes are thrown? If the CEL works but does not remain on steady with the key in ON(II) or while driving, then no CEL codes are thrown. In this case, if you jump the service connector, the CEL will remain on steady rather than blink some codes. Tip #3: My CEL turns on while driving but I can't pull any codes? In some cases, the CEL of 5th generation Civics (92-95) may turn on while driving, but if the engine is turned off, the CEL and CEL code will be lost. The workaround to allow recovery of the code when this happens is to safely pull to the side of the road and leave the engine running while you jump the service connector. Tip #4: How do I reset the ECU to clear the CEL codes? After you retrieve the CEL codes, then reset the ECU to clear the codes. This is done by removing the 7.5A hood Back Up fuse for 3 minutes or more and then reinserting it. Then drive the car to see whether the CEL again remains on steady. If so, pull the codes again to see whether any of the original codes has repeated. This step is important because you only want to troubleshoot codes that repeat. In general, ignore codes that pop up once but don't repeat. https://i639.photobucket.com/albums/...ams/wx64Kk.jpg ------------------------------------------------------------------------------------------------------------------- OBD1 CEL code List 0 ECU - ECU circuit problem 1 O2A - Oxygen sensor #1-code 0 is defined by the CEL remaining on steady both without and with the service connector jumped. -If the engine does not start, code 0 indicates that the ECU is not receiving power and/or ground or that the ECU is bad. When code 0 is thrown, start by (1) checking fuses 24 and 31 (92-95 Civics) or fuses 13 and 44 (96-00 Civics), (2) resoldering the main relay, and (3) cleaning and tightening the G101 ground attached to the thermostat housing. -If the engine does start, check for a short in the service connector wire or the CEL ground wire that runs to the ECU. 2 O2B - Oxygen sensor #2 3 MAP - manifold absolute pressure sensor 4 CKP - crank position sensor 5 MAP - manifold absolute pressure sensor 6 ECT - water temperature sensor 7 TPS - throttle position sensor 8 TDC - top dead centre sensor 9 CYP - cylinder sensor 10 IAT - intake air temperature sensor 12 EGR - exhaust gas recirculation lift valve 13 BARO - atmospheric pressure sensor 14 IAC (EACV) - idle air control valve 15 Ignition output signal 16 Fuel injectors 17 VSS - speed sensor 19 Automatic transmission lockup control valve 20 Electrical load detector 21 VTEC spool solenoid valve 22 VTEC pressure valve 23 Knock sensor 30 Automatic transmission A signal 31 Automatic transmission B signal 36 traction control found on JDM ecu's 38 Secondary vtec solenoid on JDM 3 stage D15B Vtec ECUs (P2J) 41 Primary oxygen sensor heater 43 Fuel supply system 45 Fuel system too rich or lean 48 LAF - lean air fuel sensor 54 CKF - crank fluctuation sensor 58 TDC sensor #2 61 Primary oxygen sensor 63 Secondary oxygen sensor circuit 65 Secondary oxygen sensor heater wire (black wires) 67 Cat Converter 70 Automatic transmission problem 71 random misfire cylinder 1 72 random misfire cylinder 2 73 random misfire cylinder 3 74 random misfire cylinder 4 80 EGR Valve/Line 86 ECT sensor - Cooling System 90 Evaporative Emission Control System Leak 91 Fuel Tank pressure sensor 92 EVAP Solenoid/Valve/Vacuum Lines Attachment 496194 ----------------------------------------------------------------------- Now that you know what OBD1 CEL codes are thrown, you can begin to go about fixing it. How you do that is your call, but there are lots of members here that can probably assist you. Once you have fixed the problem, reset the ECU, and you should be good to go. Happy fixing. I only describe how to check the Check Engine Light (CEL). I do not know how to fix every single issue that may pop up. A CEL can come up for lots of reasons, so there is no one set answer for each of them. If you do get a CEL, check the CEL code number as described above and then search for what other people have done. If you can't find an answer, make a new thread about it. --------------------------------------------------------------------------------------------- |
How to pull OBD2 CEL codes and list of OBD2 CEL codes
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Post 2
--------------------------------------------------------------------------------------------------- Abbreviations MIL = Malfunction Indicator Light (same as CEL) DLC = Diagnostic Trouble Code (same as CEL code) --------------------------------------------------------------------------------------------------- How to pull OBD2 CEL codes 92-95 Civics have an OBD1 ECU, whereas 96-00 Civics have the more advanced OBD2 ECU. Interestingly, the OBD2 ECU of 96-00 Civics is somewhat of a hybrid system in that CEL codes may be retrieved either (Method 1) by jumping the service connector (see Post 1) or (Method 2) by connecting a code reader or scan tool to the Data Link Connector (DLC) located near the hood release lever (see below). Method 1 recovers OBD1 codes, whereas Method 2 recovers OBD2 CEL codes, which are preferable as they are more informative at pinpointing the problem. You can purchase a code reader or scan tool to pull OBD2 CEL codes. Alternatively, you can also drive to AutoZone or certain other auto parts stores that will pull OBD2 CEL codes free of charge. Attachment 444978 Attachment 444979 When you pull OBD2 CEL codes, you will find that they look very different from OBD1 codes. OBD2 CEL codes follow this format: P followed by a 4 digit number (e.g., P0420). In the charts below, you will find lists of all OBD2 codes for 96-00 Civics and 96-97 Del Sols. You will also see numbers in parentheses. These numbers indicate the equivalent OBD1 CEL codes that are retrieved by jumping the service connector. The last diagram in this post describes how to clear CEL codes from the ECU/reset the ECU. |
How to pull OBD2 and D4 Automatic Transmission Codes
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----------------------------------------------------------------------- Automatic transmission trouble codes are indicated by a solid CEL or blinking D4 light in the gauge cluster. The codes can be pulled with either a code reader/scan tool (see Post #2 for method and code list), or by jumping the service connector and reading the blinking D4 light. Codes are cleared from the ECU as described in Post #2. |
How to pull SRS airbag system codes
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This information possibly applies to OBD2 96-00 Civics and 96-97 Del Sols. 94-95 Civics may be similar or identical to 96-98 Civics. When the SRS light stays on, jump the service connector to pull the codes: Attachment 444931 |
How to pull ABS anti-lock brake system codes/List of codes
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---------------------------------------------------------------------------------- When the ABS light stays on, pull the codes by jumping the service connector: |
Re: The Trouble Codes Thread: How to retrieve CEL, D4, SRS, and ABS codes/Code Lists
3 Attachment(s)
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--------------------------------------------------------------------------- When the ABS light stays on, pull the codes by jumping the service connector: |
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