94 Chevy Error Codes
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Trouble Codes For 94 Chevy Trucks
trucks) Previous Bottom Next Username Post: Checking trouble codes for OBD-I (1988-1995 trucks) 94 chevy obd1 codes (Topic#273660) someotherguy Moderator Posts: 27926 Age: 46 Loc: Texas Reg: 08-01-03 User InfoSend Private TopicView Profile 12-17-11 11:05 AM 1994 chevy trouble codes - Post#2169725 Hey gang, I thought I'd throw together a code checking document to replace the outside link to troublecodes.net - just a basics on how to check codes, and a
Ford Error Codes
simple code list for the common gas-engine stuff. Please let me know what y'all think so I can fine-tune it before replacing the link in our FAQ post. Thanks! --------------- Checking trouble codes on the OBD-I system used in our trucks from 1988 to 1995 is easy and requires no tools other than a paper clip or small scrap of wire for jumpering the A &
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B terminals on the DLC connector (also known as ALDL) under the driver's side of the dashboard. Here's a picture indicating the A & B terminals at the top right: ● With the ignition switch off, jumper the A & B terminals on the DLC connector. ● Turn the ignition switch on (but do not start engine) while watching the "Service Engine Soon" light on the dash. ● Each code will be represented by the SES light flashing, pausing, and flashing. ● Normal operation begins with code 12, represented by a flash, pause, flash flash indicating "1" and "2" meaning "12". ● Each code will appear 3 times before moving on to the next. Codes display in numerical order. ● When the list of codes has completed, the list will repeat, starting again with 12. ● Code 12 is normal and not an indicator of a problem. Please note that a code is a starting point and does not necessarily mean the particular sensor or system is bad. Codes can often be caused by other problems and the particular sensor is merely reporting that its data is out of range; it is up t
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you have a connector like https://www.obd-codes.com/faq/read-gm-2-digit-obd-codes-free.php this under your dash, read on... (note: this connector may have a black plastic cover over it, so also look for a cover shaped like this, sorry for the messy wires here) This is referred to as the Assembly Line Communication Link (ALDL) connector. How to read the codes 1. Ground error codes terminals A and B (see diagram below) with the ignition "ON" and engine not running. The system will enter the diagnostic mode. In this mode, the computer will display a Code 12, three consecutive times, by flashing the "CHECK ENGINE", "SERVICE ENGINE SOON" or "MALFUNCTION INDICATOR LAMP" or light. A Code 94 chevy error 12 consists of one flash, a short pause, then two flashes in rapid succession. 2. After Code 12 is displayed, any stored trouble codes will be displayed by flashing the "CHECK ENGINE", "SERVICE ENGINE SOON" or "MALFUNCTION INDICATOR LAMP" light. All codes are displayed 3 times each then a code 12 will repeat. In the diagnostic mode, the computer will also energize all computer controlled relays and solenoids. Next, proceed to our listing of GM 2-digit trouble codes to lookup what the codes mean. ALDL Diagnostics Connector (Located Underdash) Share NOTE: This information is presented for information purposes only. It is not intended as repair advice and we are not responsible for any actions you take on any vehicle. All information on this site is copyright protected. If you want to share this article or information with others, please link to this page, don't copy and paste it elsewhere. © 2004-2016 OBD-Codes.com