I installed a new ECM on my 94 Celica yesterday and the car ran great all day (until I turned my A/C on). When I turned my A/C on, the car died and fried the ECM. What would cause this?
2007-08-02 01:06:19 · 3 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
If there is a short, where should I check if the car runs fine without A/C? Is there an A/C relay or particular ground wire to check? There are only a few wires coming from the compressor.
2007-08-02 01:27:08 · update #1
A short in the wiring.
2007-08-02 01:24:15 · answer #1 · answered by Jody D 6 · 0⤊ 1⤋
If you haven't done any rewiring for a custom stereo or remote starter, etc, then the problem is with the a/c clutch. The clutch is what engages the a/c pump, and is controlled by a simple solenoid. It sounds like the 'sense' line that feeds back to the ECM has battery voltage on it. This line is used to tell the ECM that the a/c is either engaged or not. You'll need to get a wiring manual the details the a/c clutch. Also, make sure the connector to the a/c clutch isn't plugged in backwards.
2007-08-02 01:55:06 · answer #2 · answered by MadMonkey 5 · 0⤊ 0⤋
voltage spikes
never herd of this happning before you may want to consider installing a coupple diodes in the system to prevent this agin
at least 2 going to the compressor
gheck youre grounds from the batt negtive post to the body of the car
2007-08-02 02:06:29 · answer #3 · answered by mobile auto repair (mr fix it) 7 · 0⤊ 0⤋