Lexus: Trouble code: P1705

Don,

Don't know if this maps exactly, but I have a 94 es300 and I bought the
Lexus manual.. The manual says:

Detection Item
"NC2" Revolution sensor circuit malfunction (direct clutch speed sensor)

Diagnostic Trouble Code Detecting Condition
Output of direct clutch speed sensor (NC2) is 300 rpm or less under
conditions a) and b)
(2 trip detection logic)
a) Vehicle speed: 32 km/hr (20 mph) or more
b) Park/neutral position switch: OFF

-d

"DonW" <net> wrote in message
news:LgpBc.7001616$easynews.com... 

Sounds like a sensor to me. I don't know why they'd be recommending
replacing the ECM - this would be like replacing your computer because the
keyboard doesn't work.

I'm just reading between lines, but I bet this sensor is used to sense when
to lock up the torque convertor. Most modern automatics have a lock-up mode
in the torque convertor that directly couples the input and output of the
transmission, bypassing the torque convertor hydraulics, when in cruise
mode. This gives better mileage. Without the speed sensor working, this
lock-up feature is probably disabled. It is not a huge deal, but I'd get it
fixed.

- Mark

Sounds like a sensor to me. I don't know why they'd be recommending
replacing the ECM - this would be like replacing your computer because the
keyboard doesn't work.

I'm just reading between lines, but I bet this sensor is used to sense when
to lock up the torque convertor. Most modern automatics have a lock-up mode
in the torque convertor that directly couples the input and output of the
transmission, bypassing the torque convertor hydraulics, when in cruise
mode. This gives better mileage. Without the speed sensor working, this
lock-up feature is probably disabled. It is not a huge deal, but I'd get it
fixed.

- Mark