Question about 2000 Toyota Camry

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How can i check reverse switch?

I have check engine light on with a code of 1780 and 401.............

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It would be easy to check it with a continuity tester, you need to disconnect the plug from the rear of the switch and connect the continuity tester to the switch as you select revers with the gear shift leaver the continuity tester should show a circuit if it does the switch is ok. it could be that the switch will show a circuit in neutral and not make a circuit in reverse this too will be ok. best of luck JR

Posted on May 12, 2009

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I would try disconnecting he battery and letting it sit for 5 minutes, then hook it back up to see if they return-the 700 code is probably related to the 1784 code, that seems to be your main issue.

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P1780 Park/Neutral Position Switch Malfunction (Only For A/T)
This code is related to a malfunction with the park neutral position switch, it's located on the transmission.
It maybe easier to get a Chilton manual from the autoparts store to locate the sensor/switch. The book runs about $20.
Replacing the switch/sensor may resolve the reverse light problem also.

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wires are pinched and shorting together near the left (drivers side) trunk hinge. brake light power is feeding back through the reverse light wiring. this will also turn on the check engine light with a neutral safety switch malfunction code as the computer also sees this voltage in the reverse light circuit. Find and repair the wiring, pull the EFI fuse in the panel under the hood to clear the code. Hope this helps

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