Does anyone know where the diagnostic connectors are in a B3 10v?
06-22-2004, 08:48 PM
#6
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Partly correct.....
Notes on Displaying Fault Codes - Start Here
Beginning in 1989, all models sold in California, and some models sold in other states and Canada are equipped with a fault indicator lamp located on the instrument panel. The fault lamp is a means of notifying the operator of problems with the ECU or related circuits and devices. If an ECU related circuit malfunctions while the engine is running, the fault lamp will illuminate. This will notify the driver that a problem has been detected, and a trouble code will be stored in the computer memory. On most models, if the trouble is intermittent the lamp will turn off when the problem is no longer present, but a trouble code will still be stored. On other models, when a problem is detected the lamp will light and stay lit until the fault memory is erased, even if the problem was intermittent.
Under normal conditions, the fault lamp will illuminate when the key is turned ON, and will go out when the engine is started. This is a bulb check and indicates that the self diagnostic warning circuit is functioning. If the vehicle is equipped with a fault lamp, and the lamp does not illuminate when the key is turned ON, or does not go out when the engine is started then a malfunction is present, and the system should be inspected.
To verify that the vehicle is equipped with a functional fault lamp turn the ignition "on", and observe dash lights. A "CHECK" light with an engine symbol should illuminate (fault indicator lamp).
If no fault lamp is showing, leave the ignition turned "on" and insert a fuse into the top of the fuel pump relay (located in the fuse/relay panel under the hood and just front of the lower left corner of the windshield, in the plenum).
If the vehicle is equipped with a functional fault lamp, the lamp will light up while the fuse is inserted, or while test connectors under dash are properly bridged (see DISPLAYING FAULT CODES in this section), and provided the lamp is not burned out.
If the lamp did not light when the ignition was turned on, but did light with a fuse inserted in the fuel pump relay, then there may be a problem with the ECU lamp driver circuit, ECU terminal connection/wiring, or the ECU itself. Before suspecting a bad ECU, or if at this point no fault lamp has shown, follow procedures under DISPLAYING FAULT CODES for MODELS WITHOUT FAULT LAMP .
The fault lamp is also used to display any trouble codes that have been stored in memory, however, some models equipped with a fault lamp will not display codes by flashing the lamp. These models require connecting an LED test light to special test connectors on the wiring harness to display codes (see DISPLAYING FAULT CODES in this section).
Codes are read by counting the number of flashes of the lamp while the computer is in diagnostic mode. For the procedure for entering diagnostic mode and displaying fault codes, as well as a list of the codes and their definitions, see DISPLAYING FAULT CODES and EXPLANATION OF FAULT CODES in this section.
Beginning in 1989, some Audi models will have new test connectors for activating and reading fault codes. These new connectors are color coded for identification and are located below the dash panel, on the driver's side. Vehicles equipped with these connectors do not display through the fault indicator lamp. Instead, an LED test light must be connected between the test connectors to display codes. Models with these new connectors may still use a fuel pump relay with a fuse receptacle on top. Inserting a fuse into the relay will cause the fault indicator lamp to illuminate and stay on until the fuse is removed, however, this is a fuse check only. The fault memory display cannot be activated through the fuel pump relay.
On models not equipped with the new style diagnostic test connectors, the fault memory display is activated in the same manner as earlier models, by inserting a fuse into the top of the fuel pump relay for four seconds and then removing. When activated, codes will display by the flashing of either the fault lamp or a properly connected LED test light.
VEHICLES WITHOUT UNDER DASH TEST CONNECTORS use the following procedure to display fault codes.
<b>1.</b> Make sure all fuses are OK, and operate vehicle for at least 5 minutes, being sure that engine speed excedes 3,000 rpm at least once and throttle is opened to wide open throttle position at least once ("punch it" once during test drive), then let engine idle for an additional 2 minutes. Do not turn engine off as some models will erase the temporary fault memory when the ignition is turned off.
<b>(A) </b>If the engine won't start, make sure all fuses are OK, and use the ignition key in the start position to crank it over for at least 6 seconds. This will allow the control units to read signals from input sensor, check for incorrect readings, and restore or set fault codes (if any). Don't turn ignition off , fault memory may be erased.
<b>2.</b> With engine running (or key "on"), connect LED test light negative lead to test connector near fuel distributor, and positive lead to battery positive terminal (if vehicle is not one that displays via fault lamp). If you are not sure which lead on your test light is the positive lead, connect test light between the battery terminals. If the LED lights up, you have the positive lead on the positive terminal. If not, reverse the connections. If it still doesn't light, get a new test light.
<b>3.</b> Insert a good fuse into the receptacle on top of the fuel pump relay for at least 4 seconds, then remove. Fault memory display is now activated.
<b>4.</b> Observe fault indicator lamp (or LED). A start up code will display (light on once for 2.5 seconds then off for 2.5 seconds) followed by the first code stored in memory.
<b>5.</b> After the first code is displayed and recorded, insert fuse into the relay again for 4 seconds, then remove, to retrieve the next code. This step must be repeated for each code until ending code 0000 is displayed, indicating all stored codes have been displayed. Code 0000 is represented by the light coming on for 2.5 seconds at regular 2.5 second intervals. Record all codes as they are displayed.
<b>6.</b> Turn ignition "off", and remove test light.
VEHICLES WITH UNDER DASH TEST CONNECTORS
Same as step #1 above.
<b>2.</b> With engine running (or key "on"), connect LED test light positive lead to top terminal of black connector, and negative lead to bottom terminal of brown connector, using appropriate flat male connectors. Also, connect one end of a jumper wire to the bottom terminal of the black connector, and leave the other end free.
<b>3.</b> Touch the free end of the jumper wire to the bottom terminal of the brown connector for at least 4 seconds, then remove. Fault memory is now activated.
<b>4.</b> Observe LED. A start up code will display (light on once for 2.5 seconds then off for 2.5 seconds) followed by the first code stored in memory.
<b>5.</b> After the first code is displayed and recorded, touch the free end of the jumper wire to the bottom terminal of the brown connector again for 4 seconds then remove, to retrieve the next code. This step must be repeated for each code until ending code 0000 is displayed, indicating all stored codes have been displayed. Code 0000 is represented by the light coming on for 2.5 seconds at regular 2.5 second intervals. Record all codes as they are displayed.
<b>6.</b> Turn ignition "off". Remove jumper wire and test light.
READING FAULT CODES:
After one sequence of flashes is displayed, designating one code, that sequence will repeat until the next sequence is manually activated. For example, 2 flashes-short pause, then 1 flash-short pause, then 2 flashes-short pause, then 3 flash-long pause, repeat, indicates a code 2123 (full throttle switch - shorted switch or grounded wire).
The next code will not display until activated in the same way as the first. The ignition ECU will display it's memory first. When all ignition related codes have been displayed, the fuel control unit will begin displaying it's codes.
All codes are read in the same manner except for code 0000 (end of display) which is displayed by the light staying on for 2.5 seconds, then going out for 2.5 seconds alternately.
. Code 1111 - Faulty ECU
. Code 2121 - Idle Switch
. Code 2122 - Engine Speed Sensor Signal
. Code 2123 - Full Throttle Switch
. Code 2132 - Data Link Between Ignition and Fuel Control Units
. Code 2141 - Knock Sensor Control
. Code 2142 - Knock Sensor Signal
. Code 2223 - Altitude Sensor Signal
. Code 2232 - Air Flow Sensor Potentiometer
. Code 2233 - No Reference Voltage
. Code 2312 - Coolant Temperature Sensor
. Code 2341 - Oxygen Sensor Control Limit Exceeded
. Code 2342 - No Oxygen Sensor Signal
. Code 4431 - Idle Stabilizer Valve
. Code 4444 - No Faults Stored In Memory
. Code 0000 - End of Display
Notes on Fault Code Diagnosis
Manufacturers information on what conditions cause fault codes to set is not specific for all codes. For this reason, some of the examples are used only to illustrate what kinds of conditions to look for when certain codes are present. For all codes, complete testing of the device and circuit indicated by a fault code will lead to solving the problem if the problem is in that circuit.
Some devices share their signals with more than one control unit (i.e. auto trans control unit; cruise control/shift lock control unit; ABS control unit; board computer for instrument panel). If testing a device and circuit indicated by a code does not reveal any problems, check wiring diagrams and perform testing on all connected circuits. The fault may be in a circuit connected in parallel to the one indicated by the code.
Beginning in 1989, all models sold in California, and some models sold in other states and Canada are equipped with a fault indicator lamp located on the instrument panel. The fault lamp is a means of notifying the operator of problems with the ECU or related circuits and devices. If an ECU related circuit malfunctions while the engine is running, the fault lamp will illuminate. This will notify the driver that a problem has been detected, and a trouble code will be stored in the computer memory. On most models, if the trouble is intermittent the lamp will turn off when the problem is no longer present, but a trouble code will still be stored. On other models, when a problem is detected the lamp will light and stay lit until the fault memory is erased, even if the problem was intermittent.
Under normal conditions, the fault lamp will illuminate when the key is turned ON, and will go out when the engine is started. This is a bulb check and indicates that the self diagnostic warning circuit is functioning. If the vehicle is equipped with a fault lamp, and the lamp does not illuminate when the key is turned ON, or does not go out when the engine is started then a malfunction is present, and the system should be inspected.
To verify that the vehicle is equipped with a functional fault lamp turn the ignition "on", and observe dash lights. A "CHECK" light with an engine symbol should illuminate (fault indicator lamp).
If no fault lamp is showing, leave the ignition turned "on" and insert a fuse into the top of the fuel pump relay (located in the fuse/relay panel under the hood and just front of the lower left corner of the windshield, in the plenum).
If the vehicle is equipped with a functional fault lamp, the lamp will light up while the fuse is inserted, or while test connectors under dash are properly bridged (see DISPLAYING FAULT CODES in this section), and provided the lamp is not burned out.
If the lamp did not light when the ignition was turned on, but did light with a fuse inserted in the fuel pump relay, then there may be a problem with the ECU lamp driver circuit, ECU terminal connection/wiring, or the ECU itself. Before suspecting a bad ECU, or if at this point no fault lamp has shown, follow procedures under DISPLAYING FAULT CODES for MODELS WITHOUT FAULT LAMP .
The fault lamp is also used to display any trouble codes that have been stored in memory, however, some models equipped with a fault lamp will not display codes by flashing the lamp. These models require connecting an LED test light to special test connectors on the wiring harness to display codes (see DISPLAYING FAULT CODES in this section).
Codes are read by counting the number of flashes of the lamp while the computer is in diagnostic mode. For the procedure for entering diagnostic mode and displaying fault codes, as well as a list of the codes and their definitions, see DISPLAYING FAULT CODES and EXPLANATION OF FAULT CODES in this section.
Beginning in 1989, some Audi models will have new test connectors for activating and reading fault codes. These new connectors are color coded for identification and are located below the dash panel, on the driver's side. Vehicles equipped with these connectors do not display through the fault indicator lamp. Instead, an LED test light must be connected between the test connectors to display codes. Models with these new connectors may still use a fuel pump relay with a fuse receptacle on top. Inserting a fuse into the relay will cause the fault indicator lamp to illuminate and stay on until the fuse is removed, however, this is a fuse check only. The fault memory display cannot be activated through the fuel pump relay.
On models not equipped with the new style diagnostic test connectors, the fault memory display is activated in the same manner as earlier models, by inserting a fuse into the top of the fuel pump relay for four seconds and then removing. When activated, codes will display by the flashing of either the fault lamp or a properly connected LED test light.
VEHICLES WITHOUT UNDER DASH TEST CONNECTORS use the following procedure to display fault codes.
<b>1.</b> Make sure all fuses are OK, and operate vehicle for at least 5 minutes, being sure that engine speed excedes 3,000 rpm at least once and throttle is opened to wide open throttle position at least once ("punch it" once during test drive), then let engine idle for an additional 2 minutes. Do not turn engine off as some models will erase the temporary fault memory when the ignition is turned off.
<b>(A) </b>If the engine won't start, make sure all fuses are OK, and use the ignition key in the start position to crank it over for at least 6 seconds. This will allow the control units to read signals from input sensor, check for incorrect readings, and restore or set fault codes (if any). Don't turn ignition off , fault memory may be erased.
<b>2.</b> With engine running (or key "on"), connect LED test light negative lead to test connector near fuel distributor, and positive lead to battery positive terminal (if vehicle is not one that displays via fault lamp). If you are not sure which lead on your test light is the positive lead, connect test light between the battery terminals. If the LED lights up, you have the positive lead on the positive terminal. If not, reverse the connections. If it still doesn't light, get a new test light.
<b>3.</b> Insert a good fuse into the receptacle on top of the fuel pump relay for at least 4 seconds, then remove. Fault memory display is now activated.
<b>4.</b> Observe fault indicator lamp (or LED). A start up code will display (light on once for 2.5 seconds then off for 2.5 seconds) followed by the first code stored in memory.
<b>5.</b> After the first code is displayed and recorded, insert fuse into the relay again for 4 seconds, then remove, to retrieve the next code. This step must be repeated for each code until ending code 0000 is displayed, indicating all stored codes have been displayed. Code 0000 is represented by the light coming on for 2.5 seconds at regular 2.5 second intervals. Record all codes as they are displayed.
<b>6.</b> Turn ignition "off", and remove test light.
VEHICLES WITH UNDER DASH TEST CONNECTORS
Same as step #1 above.
<b>2.</b> With engine running (or key "on"), connect LED test light positive lead to top terminal of black connector, and negative lead to bottom terminal of brown connector, using appropriate flat male connectors. Also, connect one end of a jumper wire to the bottom terminal of the black connector, and leave the other end free.
<b>3.</b> Touch the free end of the jumper wire to the bottom terminal of the brown connector for at least 4 seconds, then remove. Fault memory is now activated.
<b>4.</b> Observe LED. A start up code will display (light on once for 2.5 seconds then off for 2.5 seconds) followed by the first code stored in memory.
<b>5.</b> After the first code is displayed and recorded, touch the free end of the jumper wire to the bottom terminal of the brown connector again for 4 seconds then remove, to retrieve the next code. This step must be repeated for each code until ending code 0000 is displayed, indicating all stored codes have been displayed. Code 0000 is represented by the light coming on for 2.5 seconds at regular 2.5 second intervals. Record all codes as they are displayed.
<b>6.</b> Turn ignition "off". Remove jumper wire and test light.
READING FAULT CODES:
After one sequence of flashes is displayed, designating one code, that sequence will repeat until the next sequence is manually activated. For example, 2 flashes-short pause, then 1 flash-short pause, then 2 flashes-short pause, then 3 flash-long pause, repeat, indicates a code 2123 (full throttle switch - shorted switch or grounded wire).
The next code will not display until activated in the same way as the first. The ignition ECU will display it's memory first. When all ignition related codes have been displayed, the fuel control unit will begin displaying it's codes.
All codes are read in the same manner except for code 0000 (end of display) which is displayed by the light staying on for 2.5 seconds, then going out for 2.5 seconds alternately.
. Code 1111 - Faulty ECU
. Code 2121 - Idle Switch
. Code 2122 - Engine Speed Sensor Signal
. Code 2123 - Full Throttle Switch
. Code 2132 - Data Link Between Ignition and Fuel Control Units
. Code 2141 - Knock Sensor Control
. Code 2142 - Knock Sensor Signal
. Code 2223 - Altitude Sensor Signal
. Code 2232 - Air Flow Sensor Potentiometer
. Code 2233 - No Reference Voltage
. Code 2312 - Coolant Temperature Sensor
. Code 2341 - Oxygen Sensor Control Limit Exceeded
. Code 2342 - No Oxygen Sensor Signal
. Code 4431 - Idle Stabilizer Valve
. Code 4444 - No Faults Stored In Memory
. Code 0000 - End of Display
Notes on Fault Code Diagnosis
Manufacturers information on what conditions cause fault codes to set is not specific for all codes. For this reason, some of the examples are used only to illustrate what kinds of conditions to look for when certain codes are present. For all codes, complete testing of the device and circuit indicated by a fault code will lead to solving the problem if the problem is in that circuit.
Some devices share their signals with more than one control unit (i.e. auto trans control unit; cruise control/shift lock control unit; ABS control unit; board computer for instrument panel). If testing a device and circuit indicated by a code does not reveal any problems, check wiring diagrams and perform testing on all connected circuits. The fault may be in a circuit connected in parallel to the one indicated by the code.
06-22-2004, 09:03 PM
#7
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Helpful diagram
<center><img src="http://pictureposter.audiworld.com/60004/fault_light_connectors.jpg"></center><p>Look at the shape of the plugs or connectors (brown and black). That will help you orient the slots correctly, if they are "loose", i.e., no longer attached to the plastic bottom edge. You shouldn't have to remove the cubby to get to these - they should be where the cubby plastic meets the footwell, near the pedals.
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06-22-2004, 09:54 PM
#8
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I'm going to pikes peak sat, i belive the autox is sunday but I work
I believe with the 10v you put the fuse in for at least 4 seconds and then take it out and the code will blink out. I'm not sure of the interpretation since mine is a 20v. The codes may be the same. Are you having some problems?