Hi All
Need help with testing procedures. This is my son`s vectra gsi, Started normally in the morning, done approx 25mls journey, Parked up for 1 hr, returned to use now non start. Tried my SPI only eobd available. But noticed in live data cooling sensor reading -40, also intake air temp also -40. Borrowed vaux com to code read and got the following codes.
p0110 intake air temp circuit low input.
p0115 coolant temp circuit low input.
p1122 accelerater pedal position sensor 2 high input.
Started testing cooling sensor which i thought at first was open circuit, But i had the meter on to low a setting, on the coolant sensor wiring Disconnected) i was getting approx 11.2 v. and the same on the intake air sensor. Now removed the the coolant sensor wiring to the next junction in the loom, load tested the wiring with a h/light bulb okay, This is where i need help on how to load test the the sensors feeds and earth`s correctly, ie if a connect a h/lamp bulb direct to sensors feed wires then to batt earth should it light up, I would like to try and diagnos/fix this myself. as the car is lying outside my sons house disabled, as even to get at the coolant sensor involves removing the front and centre plenoms. I have also checked the fuse feeding both sensors, and also tried a new coolant sensor.

Buy the way this has a dastek uni chip wired into the ecu wiring loom, which has been on the car for over 7 yrs now , with no problems, also had this unplugged which made no difference.

Regards John