What are the return signals on a MAF sensor?
What are the return signals on a MAF sensor?
When we study the wiring diagram, some more unusual aspects become visible. Commonly, with most 6-wire MAF sensors, we tend to see 12 V (Batt), 5 V from PCM, MAF return signal to PCM, Intake Air Temp 5 V, Intake Air Temp Return and an Earth. As you can see below, we have a 12 V feed, Ground and the two return signals for MAF and IAT.
What are the colors of the PCM connectors?
Connector C1 Blue Pin Wire Color Circuit No. Function 1 BLK/WHT 451 PCM Ground 2 LT GRN 1867 12 Volt Reference 3 PNK/BLK 1746 Fuel Injector 3 Control 4 LT GRN/BLK 1745 Fuel Injector 2 Control 5-7 Not Used 8 GRA 596 5 Volt Reference 9-10 Not Used 11 LT BLU 1876 KS [2] Signal 12 DK BLU/WHT 1869 CKP Sensor Signal
Is the intake air temperature sensor the same as the MAF sensor?
As I explained earlier, this MAF sensor is a 4-wire type which isn’t unheard off if it was just a MAF sensor. However, like all modern MAFs this one also has an intake air temperature sensor built in. This makes it different, as these types of sensors usually come with six wires. Oddly enough though, the plug is still the same as the 6-wire type.
What is the Powertrain Control Module ( PCM ) connector?
Low Speed Cooling Fan Relay Control 43 ORN/BLK 877 Fuel Injector 7 Control 44 LT BLU/BLK 844 Fuel Injector 4 Control 45 GRA 474 5 Volt Reference (A/C Refrigerant Pressure Sensor) 46 GRA 474 5 Volt Reference (Fuel Tank Pressure Sensor) 47 Not Used 48 GRA 416 5 Volt Reference (MAP Sensor) 49-50 Not Used 51 DK BLU 496
What are the colors of a 32 pin PCM connector?
C1 (Blue) PCM 32 Pin Connector Pin Wire Color Description 1 — Empty 2 — Empty 3 Brown w/ White stripe 1X CMP Signal 4 Pink Ignition Feed
What are the pin out charts for PCM?
1998-99 PCM Connector Pin Out Charts (GM 4.3L, 5.0L, 5.7L). Each connector can be identified as: C1 Blue (32 Pin Connector). C2 Red (32 Pin Connector). C3 Clear -or Grey- (32 Pin Connector). C4 Black (24 Pin Connector). Contents of this tutorial: C1 Blue. C2 Red. C3 Clear -or Grey-. C4 Black.
How many connectors does a PCM 4.3L have?
The 1996-97 PCM (Powertrain Control Module = Fuel Injection Computer) on your 4.3L, 5.0L or 5.7L Engine has a total of 4 connectors. NOTE: For other PCM pin-out charts, take a look at the following: 1993 PCM Pin Out Chart (GM 4.3L, 5.0L, 5.7L GAS w/ 4L60-E). 1994 PCM Pin Out Chart (GM 4.3L, 5.0L, 5.7L GAS with A/T).
