The 1UZFE (V8) Automatic transmission trouble codes are accessed via the “Normal” engine diagnostics. (IE: TE1 and E1 connected together.)
The following procedures show how to enter the diagnostics modes for the Automatic transmissions used in the SC300 and SC400. (The TT procedure is identical!)
Since the transmission also relies on a throttle position sensor, brakes and the selected gear, a test procedure for those items is also shown below. (See Terminal TT diagnostics.)
Obviously, the SC300 auto transmission is NOT identical to the SC400 transmission! however, this transmission is similar to the transmission used in the TT, and therefore the diagnostic codes may be more appropriate.
There are no electronic diagnostics for the manual transmission (SC300). This is curious, as monitoring of the vehicle speed sensor/s is a component that would have been testable. (And, is a relatively common source of trouble!)
The following diagnostic applies to the SC400, SC300, and the Twin Turbo Soarers. It tests most of the possible switch inputs to the automatic ECU, as well as the sub throttle position sensor.
Sunday, November 21, 2004 - 11:07 am, by: Harry Lemmens
A PDF version of this document is available for download.
Right Click your mouse on the Attachment below and use Save Target As to direct it to an appropriate location on your local Hard Disk. That way you will always have the document on hand for quick and ready reference!
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Auto Tran Diag.pdf
