Help!!!!! with ECM and sensor wiring
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Help!!!!! with ECM and sensor wiring
I have been having problems with my CTS for a while now and I have finally decided that it must be something to do with the wiring. I have gone through three in the last 6 months. I have determined that there is a short or some other disturbance in the yellow wire coming off the sensor. I determined this by clearing the codes, connecting the black and yellow wires with a jumper, started car, got another code 15. I am told that this means it is a wiring problem. I then cleared the codes again and ran a jumper from the yellow wire to a good ground. Cleared the codes again, started it up and got another 15. My procedure tells me that this means that there is a problem with the yellow wire. Soooooo......I took my multi meter and did some tests. This is where you come in because when it comes to wiring and electronics, I am an idiot. I first tested for continuity on the yellow wire to the harness. It had continuity. The resistance on this wire was .1-.2 ohms with the ignition off. I couldnt get a value when the car was running, the meter would switch between k ohms and m ohms and stay at 0. The ground wire showed a resistance of 45 when the ignition was in the on position and 91 when the car was running. I then decided to get some values from the ECM pin #10, the CTS pin. On the yellow plug on the ECM pin 10 was as follows:
Top pin: 1.5 k ohms
Bottom pin: 1.7 k ohms
The black plug:
Top: 0
Bottom: 1.2 k ohms
I am not sure which one is the right plug as I am running an integrator for the SD conversion and the wires change colors. I am not sure if I am going about this right or if I have just made an *** of myself but I don't know where to go from here. Thanks.
bsa
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"If they do not run, Then they will die." - Stonewall Jackson
'87 IROC, 355 TPI, Converted to SD, 700R4, B&M Megashifter, 3.42, Trick Flow Twisted Wedge Heads, Comp Cam, Comp 1.6 Rockers, Lucas 23# injectors, Edelbrock headers, Flowmaster 3'' exhaust, gutted cat, Mallory coil, Mallory HyFire IV ignition box, Mallory Sidewinder 8mm wires, Autolite platinum plugs, K&N filters, Transgo Performance Shift Kit, Corvette Servo, 2,000 Stall Torque Converter
Top pin: 1.5 k ohms
Bottom pin: 1.7 k ohms
The black plug:
Top: 0
Bottom: 1.2 k ohms
I am not sure which one is the right plug as I am running an integrator for the SD conversion and the wires change colors. I am not sure if I am going about this right or if I have just made an *** of myself but I don't know where to go from here. Thanks.
bsa
------------------
"If they do not run, Then they will die." - Stonewall Jackson
'87 IROC, 355 TPI, Converted to SD, 700R4, B&M Megashifter, 3.42, Trick Flow Twisted Wedge Heads, Comp Cam, Comp 1.6 Rockers, Lucas 23# injectors, Edelbrock headers, Flowmaster 3'' exhaust, gutted cat, Mallory coil, Mallory HyFire IV ignition box, Mallory Sidewinder 8mm wires, Autolite platinum plugs, K&N filters, Transgo Performance Shift Kit, Corvette Servo, 2,000 Stall Torque Converter
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