Engine ecm pin out - 1997 Lexus LS 400

TRUCK MEANS C1500 PICKUP?
NO SURE THE PROBLEM? IS THERE ONE?
THE MAF WIRE TO THE PCM SO IT CAN COMPUTER FLOWS AND MATCH INJECTION RATES TO IT.
MY GUESS IS YOU HAVE NO SERVICE MANUAL
NOR KNOW HOW TO TEST ANY MAF.
DID THE SCAN TOOL SHOW MAF DTC ERRORS?
MOST MAF AR3 3 PINS, GROUND , SIGNAL ,DC POWER.
MANUAL IS HERE
https://eautorepair.net/Marketing/Default.asp

I WILL PRESENT THE MAF PIN OUT.

12VDC POWER IS ING1 FUSE. BOX UNDERHOOD
B PIN IS GROUND
IT IS THAT SIMPLE.

This type of work normally requires diagnostic or key coding equipment .

the blue ( e-f ) ECM connecter pin F15 cicuit #496 ( Dk Blu wire )

Hi there:
Check in THIS LINK the description about your problem, work to your engine and DTC (DIagnostic Trouble Code) find it:

I suggest to check and confirm you no problem with the wiring between the injector connector pins and the ECM (Engine Control Module) and you have good pin tension at the injector. Also test good pin tension at the ECM and good continuity between the injector and injector fuse. If in fact this is so, you have a bad ECM.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Hi there:
Check in THIS LINK the description about your problem, work to your engine and DTC (DIagnostic Trouble Code) find it:

I suggest to check and confirm you no problem with the wiring between the injector connector pins and the ECM (Engine Control Module) and you have good pin tension at the injector. Also test good pin tension at the ECM and good continuity between the injector and injector fuse. If in fact this is so, you have a bad ECM.


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.


Thank you for using FixYa, have a nice day.

If you are refering to the Engine Control Module (ECM) for your 1987 Blazer, there are two connectors. One is the "A/B" connector (24 Pins) and the other is the "C/D" connector (32 Pins). The letters represent the rows in which a particuler wire or wire connector can be found. For example, if the wiring diagram shows the wire to be going to ECM connector B4, The actual location would be in the 24 pin connector at the ECM and would be the fourth wire in the "B" row of connector pins. SEE DIAGRAM BELOW.

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:

Hello! There isn't power to ECM pins 109 and 111 because the ECM relay is not pulling...Pins 1 and 3 (White/Black wire) are tied together in the harness and should not show a change in symptom if jumped together...Also, Pins 1 and 3 are fed battery from fuse # 36 (15A hot at all times) and both pins must read +12 volts...Pin 2 of the relay coil is the pulling ground from the ECM...Reading across pins 1 and 2 with the key in the ON position should not read +12 volts...If it does the relay coil is open...With the key on the relay would show a voltage drop across the coil...Check pins 1 and 3...must be tied together and have +12 volts from fuse # 36 (15A hot at all times)...Replace ECM relay...See photo...............Guru....Saailer...



STANDARD MOTOR PRODUCTS Part # RY412 Cost

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

Hello! The ZETEC engine was used in the 1999 Ford Escort...I do not know what year your vehicle is, however the pin layouts are the same...

The Fuel Injector Fuse (30A) feeds the injectors via normally open contacts of the PCM Power Relay on a Red/White wire (which becomes Red at the injectors) on pin #12 of the Constant Control Module...
The wire colors of injector control leads (at the injectors) are..#3=Brown/Yellow...#1=Tan...#4=Brown/Light Blue...And #2=White

Wire colors at the PCM plug are...#3=Brown/White (pin 74)...#1=Yellow (pin 75...#4=Green/Orange (pin100)...and #2=Violet/Yellow (pin 103)...

Size restrictions on attachments do not allow me to send the entire PCM...aka...ECM pin layout to you...

Guru.............saailer

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

Go to TBICHIPS.com he will answer for you