clock fix and MAF testing...
09-20-2001, 06:35 AM
#1
clock fix and MAF testing...
added a new how-to on my site to fix clock
link in my sig
also, many have been talking about checking their MAF (mass air flow sensor) recently so here is the procedure to test it:
taken from FSM:
The Mass Air Flow (MAF) sensor directly measures the amount of air flowing into the engine. The sensor is mounted between the air cleaner assembly and the air cleaner outlet tube.
The sensor utilizes a hot wire sensing element to measure the amount of air entering the engine. The sensor does this by sending a signal, generated by the sensor when the incoming air cools the hot wire, to the ECM. The signal is used by the ECM to calculate the injector pulse width, which controls the air/fuel ratio in the engine.
Testing
1. Using a multimeter, check for voltage by backprobing the MAF sensor connector. Connect the + probe on the tester to the B terminal of the connector. This connector should have 5 wires going into the 6 slot connector. The lettering starts on the side where the first wire is (A, B, C, D, E, empty). So you want to test the second wire on the side without the empty connection. Keep this connector connected while you are running the tests. Do this by folding back the rubber boot from the back of the connector
2. With the ignition switch ON and the engine stopped, voltage should be less than 1.0 volt.
3. With the engine idling at operating temperature, voltage should be 1.0-1.7 volts.
4. With the engine running at approximately 2,500 rpm, voltage should be 1.5-2.1 volts.
It is important to watch for a linear voltage rise in response to increases in engine rpm, up to about 4000 rpm.
5. If voltage is not within specifications, check the power and ground circuits.
6. If the power and ground circuits test okay, the MAF sensor may be faulty.
link in my sig
also, many have been talking about checking their MAF (mass air flow sensor) recently so here is the procedure to test it:
taken from FSM:
The Mass Air Flow (MAF) sensor directly measures the amount of air flowing into the engine. The sensor is mounted between the air cleaner assembly and the air cleaner outlet tube.
The sensor utilizes a hot wire sensing element to measure the amount of air entering the engine. The sensor does this by sending a signal, generated by the sensor when the incoming air cools the hot wire, to the ECM. The signal is used by the ECM to calculate the injector pulse width, which controls the air/fuel ratio in the engine.
Testing
1. Using a multimeter, check for voltage by backprobing the MAF sensor connector. Connect the + probe on the tester to the B terminal of the connector. This connector should have 5 wires going into the 6 slot connector. The lettering starts on the side where the first wire is (A, B, C, D, E, empty). So you want to test the second wire on the side without the empty connection. Keep this connector connected while you are running the tests. Do this by folding back the rubber boot from the back of the connector
2. With the ignition switch ON and the engine stopped, voltage should be less than 1.0 volt.
3. With the engine idling at operating temperature, voltage should be 1.0-1.7 volts.
4. With the engine running at approximately 2,500 rpm, voltage should be 1.5-2.1 volts.
It is important to watch for a linear voltage rise in response to increases in engine rpm, up to about 4000 rpm.
5. If voltage is not within specifications, check the power and ground circuits.
6. If the power and ground circuits test okay, the MAF sensor may be faulty.
11-18-2003, 01:30 PM
#2
Senior Member
Join Date: Dec 2001
Posts: 121
Originally Posted by «§»Craig B«§»
added a new how-to on my site to fix clock
link in my sig
also, many have been talking about checking their MAF (mass air flow sensor) recently so here is the procedure to test it:
taken from FSM:
The Mass Air Flow (MAF) sensor directly measures the amount of air flowing into the engine. The sensor is mounted between the air cleaner assembly and the air cleaner outlet tube.
The sensor utilizes a hot wire sensing element to measure the amount of air entering the engine. The sensor does this by sending a signal, generated by the sensor when the incoming air cools the hot wire, to the ECM. The signal is used by the ECM to calculate the injector pulse width, which controls the air/fuel ratio in the engine.
Testing
1. Using a multimeter, check for voltage by backprobing the MAF sensor connector. Connect the + probe on the tester to the B terminal of the connector. This connector should have 5 wires going into the 6 slot connector. The lettering starts on the side where the first wire is (A, B, C, D, E, empty). So you want to test the second wire on the side without the empty connection. Keep this connector connected while you are running the tests. Do this by folding back the rubber boot from the back of the connector
2. With the ignition switch ON and the engine stopped, voltage should be less than 1.0 volt.
3. With the engine idling at operating temperature, voltage should be 1.0-1.7 volts.
4. With the engine running at approximately 2,500 rpm, voltage should be 1.5-2.1 volts.
It is important to watch for a linear voltage rise in response to increases in engine rpm, up to about 4000 rpm.
5. If voltage is not within specifications, check the power and ground circuits.
6. If the power and ground circuits test okay, the MAF sensor may be faulty.
link in my sig
also, many have been talking about checking their MAF (mass air flow sensor) recently so here is the procedure to test it:
taken from FSM:
The Mass Air Flow (MAF) sensor directly measures the amount of air flowing into the engine. The sensor is mounted between the air cleaner assembly and the air cleaner outlet tube.
The sensor utilizes a hot wire sensing element to measure the amount of air entering the engine. The sensor does this by sending a signal, generated by the sensor when the incoming air cools the hot wire, to the ECM. The signal is used by the ECM to calculate the injector pulse width, which controls the air/fuel ratio in the engine.
Testing
1. Using a multimeter, check for voltage by backprobing the MAF sensor connector. Connect the + probe on the tester to the B terminal of the connector. This connector should have 5 wires going into the 6 slot connector. The lettering starts on the side where the first wire is (A, B, C, D, E, empty). So you want to test the second wire on the side without the empty connection. Keep this connector connected while you are running the tests. Do this by folding back the rubber boot from the back of the connector
2. With the ignition switch ON and the engine stopped, voltage should be less than 1.0 volt.
3. With the engine idling at operating temperature, voltage should be 1.0-1.7 volts.
4. With the engine running at approximately 2,500 rpm, voltage should be 1.5-2.1 volts.
It is important to watch for a linear voltage rise in response to increases in engine rpm, up to about 4000 rpm.
5. If voltage is not within specifications, check the power and ground circuits.
6. If the power and ground circuits test okay, the MAF sensor may be faulty.
I have a VG, will this procedure work?
11-18-2003, 03:26 PM
#6
11-18-2003, 04:01 PM
#7
Originally Posted by crazy4maxima
what?
this thread is over 2 years old, good searching chris
Thread
Thread Starter
Forum
Replies
Last Post
TallTom
5th Generation Maxima (2000-2003)
50
07-08-2022 09:54 AM