TT Paul Posted July 20, 2013 Share Posted July 20, 2013 (edited) went for a drive around 10 miles filled up at pump wouldn't start checked codes 12 came up already done new crank sensor had 13 that time, tried a few more times cleared codes no joy waited 30mins then it started drove home had some overboosting but none on the way to garage, got home recheck codes nothing wtf.. try restarting was fine plugs to cam sensors etc look ok, cam sensors worth replacing them!! any input would be good thanks Edited August 3, 2013 by TT Paul (see edit history) Quote Link to comment Share on other sites More sharing options...
GreaseMonkey Posted July 20, 2013 Share Posted July 20, 2013 Just some ideas..... Does the Engine cranking speed sound ok?, just wondering if the 12v Vehicle Battery has a bad cell/ poor condition/ poor connection, possible cause to the DTC's being cleared when rechecking? . Or possibly faulty 12v Vehicle Battery Positive/ Negative connection or ground connection issue, as have seen crank sensor codes come up sometimes due to the Engine turning over at a slower speed causing unstable voltage/ sensor signal from or between ECU to Crank and Cam sensors?. Other things to check is the air gap/ alignment of the Crank sensor and Cam Sensors, as when hot this gap may expand enough for the sensor not to pick it up? As per the Toyota Manual: Open or short in crankshaft position sensor , camshaft position sensor No.1, No.2 Circuit. Crankshaft Position Sensor. Camshaft Position sensor. Starter. ECU. Mechanical system malfunction (skipping of teeth of timing belt, belt stretched). Also to add, is the Vehicle fitted with an immobiliser that takes a feed off the crank or cam position sensor/ or cuts the cam /crank signal to prevent starting? Quote Link to comment Share on other sites More sharing options...
TT Paul Posted July 21, 2013 Author Share Posted July 21, 2013 the car has a toad alarm fitted some times hazards flash after taking a while to start but not when it broke down and rev needle flickers while cranking so i assume crank sensor ok as its new, also cranking speed is good so its voltage recovery pops back up to 12.5v then starts charging batts is also new.. and new cam belt too a yr ago the prob seems to clear for a while then come back.. Quote Link to comment Share on other sites More sharing options...
TT Paul Posted July 23, 2013 Author Share Posted July 23, 2013 wiring to cam sensors seems ok using multimeter and some other cam sensors fitted thinking its toad alarm after some research on the net watch this space!! Quote Link to comment Share on other sites More sharing options...
Abz Posted July 23, 2013 Share Posted July 23, 2013 wiring to cam sensors seems ok using multimeter and some other cam sensors fitted thinking its toad alarm after some research on the net watch this space!! Reading the symptoms it does sound very much immobilizer related!! More so because it is so intermittent. How old is the alarm Paul? Quote Link to comment Share on other sites More sharing options...
TT Paul Posted July 24, 2013 Author Share Posted July 24, 2013 Reading the symptoms it does sound very much immobilizer related!! More so because it is so intermittent. How old is the alarm Paul? its 4+ yrs old and its no longer cat 1 so gonna get it replaced, Quote Link to comment Share on other sites More sharing options...
TT Paul Posted August 3, 2013 Author Share Posted August 3, 2013 well new alarm, 260, crank sensor 110, some searching by me wiring check etc.. many hrs turns out AEM fic is playing up connections on PCB had a look where to start its interesting to say... Quote Link to comment Share on other sites More sharing options...
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