Question about 2001 GMC Sierra 2500HD

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Need wiring diagram for a 2001 GMC 3/4 ton 4x4 8.1 maf sensor 5 wire

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Posted on May 01, 2010

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Gm trouble codes explained


code p0102 refers to mass air flow(MAF) sensor /volume air flow (VAF) sensor -low input. Causes ---wiring short to ground --MAF/VAF sensor ---ECM.

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For a 2005 GMC yukon 5.3L what are the wire colors that control the IAT sensor There should only be 2 wires controlling it but there are 5 on the connection as it controls the MAF and IAT with the sa


The intake air temp sensor is part of the MAF sensor so yes there are 5 wires.
The two wires that go to the air temp sensor are tan and black. The other three are for the MAF.

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That is no chip it is a 10 cent resistor and a real rip off. The signal is altered from the MAF and this can result in severe detonation and engine damage.

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Colors of wires of MAF sensor in 2001 VW golf gti vr6


2001 VW Golf GTi VR6
On the MAF sensor connecting plug you will see 5 pin numbers. Each pin number correspond to a wire color:
Pin no.# 1 = violet/green, is comming from pin no.# 26 of ECM. ECM = Engine Control Module.
Pin no.# 2 = blue/yellow, is comming from fuse no.# 43 = 10 Amp. (battery plus is comming through a blue wire from pin no.# 23 of fuel pump relay).
Pin no.# 3 = green, is comming from pin no.# 27 of ECM.
Pin no.# 4 = red/violet, is comming from pin no.# 53 of ECM.
Pin no.# 5 = black, is comming from pin no.# 29 of ECM.

Wiring diagram:

2_11_2012_8_32_32_am.jpg

Feb 10, 2012 | Cars & Trucks

1 Answer

I need to buy a wiring diagram (schematic) for a1973 gmc 3/4 ton w/ a 350 eng


can't help you with a diagram, but I have the '71... they should be fairly similar if not exactly the same. If you can describe the wiring issue (what colour, where it's at or what you need to figure out what hooks up where) let me know and I can take a look on my beast and maybe help you that way. They're pretty basic, no computers or fancy sensors... I swear, there's like maybe ten wires in the entire truck! (Okay, bit of an exaggeration - maybe 20 wires :p)

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Wiring diagram for my 2003 GMC Sierra 1500 HD it has 5 wires at the IAT MAF .


black wire is the 5 volt reference from PCM to IAT. Tan is IAT data signal to PCM. See diagram below.

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Oct 31, 2010 | GMC Sierra 1500HD Cars & Trucks

1 Answer

I got a p0113 code for the mass air flow sensor on a ford sport track 2001 4.0 litre. I replaced the part but my truck will not run with the sensor plugged in. I can start it with it unplugged but when I...


1. At the Mass Air Flow (MAF) sensor connector, backprobe the Gray (GY) wire at terminal #6 with the key on and the MAF sensor connected. Typical voltage will be about 2-3.5v depending on temperature.

2. If the voltage is above 4.5v (which is what the code P0113 indicates) check the voltage on the Gray/Red (GY/RD) wire at terminal #1 of the MAF sensor connector. The voltage on the GY/RD should be less than about 0.1v.

3. If the GY/RD wire shows less than 0.1v and the voltage on the GY wire is above 4.5v, inspect the connections at the MAF sensor connector. If OK, replace the MAF sensor for the open Intake Air Temperature (IAT) Sensor.

4. If the voltage on the GY/RD wire shows above 0.1v, locate and repair the high resistance between the MAF sensor and pin #91 of the Powertrain Control Module (PCM) connector.

5. If the voltage on the GY wire is not above 4.5v but the scanner shows -40 F on the data stream, check the voltage at pin 39 of the PCM. If the voltage at the PCM is above 4.5v, locate and repair the high resistance or open circuit in the GY wire between the PCM and MAF sensor connector

Nov 23, 2009 | 2001 Ford Explorer Sport Trac

1 Answer

Can't locate Intake Air Temperature Sensor Connector


The IAT is integrated with the MAF (Mass Air Flow) sensor all one unit the following diagram should help
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Dec 05, 2008 | 2006 GMC Envoy

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