Fault Code 24
Description: Throttle position sensor (TPS) signal is out of range
Power loss light: On
Limp-in mode: MAP sensor is used as an indication of thottle position
TPS failure - The TPS is located on the throttle body on the opposite side of the throttle cable. Turn the engine off, disconnect the sensor and test it by connecting an ohmmeter (preferably an analog one) between the center and either outside pin of the sensor. Slowly open the throttle all the way and then slowly close it again. The ohmmeter should show a constant, smooth change in resistance as the throttle is moved. If there are any jumps in reading or no change in reading at all, replace the sensor. If the sensor seems ok, reconnect the sensor cable and turn the ignition on. One outside wire should be 5V, the other ground. The voltage on the center wire should vary as the throttle is opened (about 0V closed, 3V wide open). If power or ground is not present, check the wiring.
Bad connection or wiring - Check the wiring and connections between the sensor and the logic module (or SMEC). Clean and regrease any corroded connectors with dielectric grease. Check connections if there is no power or ground, or for shorts if there is power and resistance, but no output.
Fault Code 27
Description: Injector driver circuit 2 open or shorted
Power loss light: Off
Limp-in mode: None
Bad connection or wiring - Check the wiring and connections to injectors 3 and 4 in the injector harness (above the fuel rail) and between the harness and the power module (or SMEC) and the injector contol lines between the logic module and power module. Clean and regrease any corroded connectors with dielectric grease and repair any shorts.
Injector driver transistor failure - Check the injector signals coming from the power module (or SMEC). They should rise to about 12V when the injector is off and drop close to 0V when the injector is on. If they are out of spec, you may need to replace the power module.
At this point I would have to say that either the TN/YL wire is broken off in the harness or somebody changed the harness at one point.I ran the Code 54 file you sent me and cavity 1 had a reading of 9.27
And cavity 2 had a reading of 8.74
I went to do the test to the Lm but the terminal cavity for #17 did not have anything in it,it was empty no wire ran into it.I checked a couple
times to make sure i was looking at it correctly.
If you probed the wires, then yeah, you will get some voltage. Because you are going through the injectors to ground. I don't know what the actual voltage should be.I probed them wires on the red connecter VT/YL wire in Cavity #2 and GY/WT Cavity #1.
I got a voltage reading of 5.02 from both when the ignition was on and 0.00 when off.