Still getting 01 02 CEL code after swapping all coils..any ideas?
04-12-2003, 08:20 PM
#1
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Still getting 02 01 CEL code after swapping all coils..any ideas?
EDIT: sorry I meant 02 01 Ignition Signal Circuit
This f*ckin thing is driving me crazy, ignition signal circuit code. All coils swapped and still having the problem. I checked the ECU wires that looks ok...any ideas?
This f*ckin thing is driving me crazy, ignition signal circuit code. All coils swapped and still having the problem. I checked the ECU wires that looks ok...any ideas?
04-12-2003, 10:20 PM
#2
DTC 0102
Diagnostic Trouble Code 0102 points to a problem with the Mass Air Flow Sensor.
The MAFS is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a thin film that is supplied with electric current from the Engine Control Module. The temperature of the hot film is controlled by the ECM a certain amount. The heat generated by the hot wire is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to the hot film as air flow increases. This maintains the temperature of the hot film. The ECM detects the air flow by means of this current change.
This malfunction is detected when an out-of-range voltage is sent to the ECM. That voltage might be too high
or too low.
a) An excessively high voltage from the MAFS is sent when the engine is not running.
b) An excessively high voltage from the MAFS is sent under light load driving conditions.
Possible causes include...
- Harness or connectors (the sensor circuit is open or shorted.)
- Faulty MAFS
c) An excessively low voltage from the MAFS is sent when the engine is not running.
d) An excessively low voltage from the MAFS is sent under heavy load driving conditions.
Possible causes include...
- Harness or connectors (the sensor circuit is open or shorted.)
- Intake air leaks
- Faulty MAFS
With DTC 0102 the ECM is supposed to switch into Fail Safe mode and limit engine speed to 2400 rpm.
The MAFS is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a thin film that is supplied with electric current from the Engine Control Module. The temperature of the hot film is controlled by the ECM a certain amount. The heat generated by the hot wire is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to the hot film as air flow increases. This maintains the temperature of the hot film. The ECM detects the air flow by means of this current change.
This malfunction is detected when an out-of-range voltage is sent to the ECM. That voltage might be too high
or too low.
a) An excessively high voltage from the MAFS is sent when the engine is not running.
b) An excessively high voltage from the MAFS is sent under light load driving conditions.
Possible causes include...
- Harness or connectors (the sensor circuit is open or shorted.)
- Faulty MAFS
c) An excessively low voltage from the MAFS is sent when the engine is not running.
d) An excessively low voltage from the MAFS is sent under heavy load driving conditions.
Possible causes include...
- Harness or connectors (the sensor circuit is open or shorted.)
- Intake air leaks
- Faulty MAFS
With DTC 0102 the ECM is supposed to switch into Fail Safe mode and limit engine speed to 2400 rpm.
04-13-2003, 06:17 AM
#4
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Kevin, on the main wire harness on the top right side of the engine you can find, wrapped up in black tape, a condensor. It has only one lead on it, it may be bad. The condensor taps onto the ignition signal to smooth things out.
04-13-2003, 08:30 AM
#5
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Join Date: Aug 2000
Posts: 2,529
Originally posted by njmaxseltd
Kevin, on the main wire harness on the top right side of the engine you can find, wrapped up in black tape, a condensor. It has only one lead on it, it may be bad. The condensor taps onto the ignition signal to smooth things out.
Kevin, on the main wire harness on the top right side of the engine you can find, wrapped up in black tape, a condensor. It has only one lead on it, it may be bad. The condensor taps onto the ignition signal to smooth things out.
thanks I'll look at it today,
Would that effect things like the car shaking a lot in reverse? How easy/hard is it to replace that connector?
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