![]() ![]() I believe this indicates that these systems are normal and not storing any error codes.Īfter playing around under the bonnet investigating the idle problem I noticed that the engine light was flashing differently. ![]() With a jumper wire connecting pins E1 and TC in the diagnostic socket under the bonnet the O/D OFF, ABS, airbag and engine lights were all flashing at about twice per second. While doing all this I noticed something interesting. Gave it a few revs.įor three days the car has been performing normally. I also gave the throttle body a clean behind the butterfly, it was not very dirty. Then I sprayed a large amont of throttle body cleaner into the IAC ports in front and behind the throttle butterfly. I took the intake hose of the throttle body. :)Īn update for those that are interested. However, I always like thinking about these things for a long time before putting a tool on the car. Shifting patterns and performance are normal.įrom reading the forums an IAC clean seems to be the next thing to try. Otherwise the car is performing normally. Whether the problem is occurring or not, when stationary, the idle-up as a result of AC on or steering movement appears to work normally. ![]() When the problem is occurring this test results in no rpm change. Engine rpm increases for ~5seconds then returns to slow idle. When the problem is not occurring I have tried the DLC1 test and the IAC valve behaves normally. Of course, have also checked cruise control, throttle cables, vacuum operated start idle-up. Checked wiring between ECM and IAC, no problems. I have tested the coil resistances, normal. Let the car roll from stationary down a long hill (trans in N) engine speed climbs with the car speed to 2400rpm as car reaches 100km/h.Īlso, with car stationary with Trans in PARK or N idle is around 1000rpm rather than the usual 750rpm. in N) and engine speed slows from 2400rpm as though it is matching the car road speed. ![]() Let the car slow naturally (without brake and with trans. Foot off the brake and the engine returns to 2400rpm. Touch the brake and the engine returns to slow idle. Slip the transmission into neutral at 100km/h and the engine remains at 2400rpm. I noticed that after taking my foot off the gas on a flat or down hill road the car did not slow down. The car is a 1999 Camry V6 automatic transmission, MCV20 series 1MZ-FE engine, 200,000km. ![]()
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