simbasupra Posted December 21, 2014 Share Posted December 21, 2014 (edited) Supra not starting, turns over fine. Took fuel pipe off to find no fuel getting to engine. Cant hear fuel pump priming. Also noticed engine light not coming on with ignition. Would this sound like an immobiliser fault? It has a clifford 650 mk2. It seems to be working fine, light goes off when disarmed. However this is the only thing I could think of that might cut fuel and ecu power? Edited December 21, 2014 by simbasupra (see edit history) Quote Link to comment Share on other sites More sharing options...
Benjy Posted December 21, 2014 Share Posted December 21, 2014 I've got the same alarm and the ECU light, as you say, doesn't come on until the immobiliser is disarmed. However, if the immobiliser doesn't disarm, the engine won't crank. Quote Link to comment Share on other sites More sharing options...
simbasupra Posted December 21, 2014 Author Share Posted December 21, 2014 I've got the same alarm and the ECU light, as you say, doesn't come on until the immobiliser is disarmed. However, if the immobiliser doesn't disarm, the engine won't crank. Just tried to start the car with the alarm armed and as you said it wont crank, alarm goes off. So that rules out immobiliser i guess. Ive heard if no engine light it means ecu has no power, so think next step would be to look at wiring to ecu. Quote Link to comment Share on other sites More sharing options...
Scooter Posted December 21, 2014 Share Posted December 21, 2014 You can test the fuel pump by bridging two bits on the diagnostics port.....will try and find a link for you. Quote Link to comment Share on other sites More sharing options...
Scooter Posted December 21, 2014 Share Posted December 21, 2014 Post 2:) http://http://www.mkivsupra.net/vbb/showthread.php?263345-Fuel-pump-ECU&highlight=Bridging Quote Link to comment Share on other sites More sharing options...
simbasupra Posted December 21, 2014 Author Share Posted December 21, 2014 Tried testing the fuel pump earlier by bridging the terminals. No noise heard, however I don't think it will work due to engine ECU possibly not getting power. Quote Link to comment Share on other sites More sharing options...
TT Paul Posted December 22, 2014 Share Posted December 22, 2014 i think the power to ecu is a black wire with yellow strip, i would check ecu fuses etc.. then check for voltage at these fuses. it sounds like a power issue. where are you based see your in hants too,, Quote Link to comment Share on other sites More sharing options...
simbasupra Posted December 22, 2014 Author Share Posted December 22, 2014 i think the power to ecu is a black wire with yellow strip, i would check ecu fuses etc.. then check for voltage at these fuses. it sounds like a power issue. where are you based see your in hants too,, Checked the fuses. Will check the relays and wiring later. Think it might be wiring as its had an alarm fitted with dodgy looking splicing. Located near Southampton. Quote Link to comment Share on other sites More sharing options...
simbasupra Posted December 24, 2014 Author Share Posted December 24, 2014 Any more ideas of things I could check? Running out of ideas. Quote Link to comment Share on other sites More sharing options...
Benjy Posted December 24, 2014 Share Posted December 24, 2014 Have you checked the main fuse? Also, check earths. Literally just had a Qashqai not starting due to a broken earth strap. Quote Link to comment Share on other sites More sharing options...
simbasupra Posted December 24, 2014 Author Share Posted December 24, 2014 Does anyone know what earth points are used in the ecu power wiring? Quote Link to comment Share on other sites More sharing options...
Benjy Posted December 24, 2014 Share Posted December 24, 2014 I'd try a jump lead between the engine and the - battery terminal first off mate. Quote Link to comment Share on other sites More sharing options...
simbasupra Posted December 24, 2014 Author Share Posted December 24, 2014 Jump lead made no difference Quote Link to comment Share on other sites More sharing options...
Benjy Posted December 24, 2014 Share Posted December 24, 2014 You need to check for power and earth at the ECU then buddy. Quote Link to comment Share on other sites More sharing options...
simbasupra Posted December 24, 2014 Author Share Posted December 24, 2014 I checked today, not 100% im correct but im sure it had 12v feed. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 24, 2014 Share Posted December 24, 2014 The ecu grounds to the engine are under the plenum, two black wires with a 6mm hole eyelet tag on each. Hard to see. I think DavidP posted a photo a while back. You can soon see if the ecu is operative as MAP sensor, TPS, ecu coolant temp sensor, cam position sensors, blah blah will a 5V supply from the ecu. Check the MAP sensor has 5V feed, it' easy to get at and only has three wires, and it's *NOT* the yellow / black one. Quote Link to comment Share on other sites More sharing options...
bignum Posted December 25, 2014 Share Posted December 25, 2014 Another thing to check, plugs in the passenger footwell especially if you`ve had the engine out, i forgot 1 and had similar problems. Quote Link to comment Share on other sites More sharing options...
simbasupra Posted December 26, 2014 Author Share Posted December 26, 2014 Removed and refitted ecu plugs, rewired couple of dodgy looking alarm install wires and light has come back on and engine started. Thanks for your help guys, much appreciated. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.