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Sure would be great if the process this guy did could actually be documented for those of us with LH-DI/APC non-trionic cars that still have TCS.
ask and ye shall receive:
You're removing the ETS (Electronic Throttle System) from the car:
1. Remove ETS ECU from the car (located below the driver's seat). Move driver's seat (they only came with electric adjust) all the way forward and up for proper access.
2. Install '91 LH box, throttle body, throttle cable. Latter two can also come from a '94 FPT model, '95-'97 LPT model, or '96-'98 FPT model (i.e. newer 9k turbos without ETS).
3. Add TPS and AIC from LH2.4.2 car.
4. Add wiring for TPS and AIC to engine wiring harness, or swap to '91 harness.
5. Install non-ETS engine temp sensor (NTC). Tweak engine wiring harness accordingly, or swap to '91 harness.
6. Install standard gas pedal from any non-ETS 9000.
7. If the car has an auto tranny, remove the kick-down motor and set up the kick-down cable as required for a non-ETS car. Also remove the ASR ECU (box responsible for operating the kick-down motor), which lives on top of the ETS ECU inder the driver's seat.
8. Remove extraneous ETS vacuum valves (one at the false-firewall, one on the driver's side inner fender), and route new vacuum hoses as required for non-ETS cars (manifold to FPR, manifold to dash gauge, manifold to hooter valve).
** At this point, the car will start and run like a '91. Several minor issues are left:
9. In order for the a/c to work as designed, several tweaks are necessary in the wiring harnesses for the engine (if not swapped for a '91 harness) and the engine compartment. You can hack the existing wiring for a quick fix to allow the a/c compressor to kick in by jumpering two terminals at the now-defunct ETS ECU connector.
10. "TCS CTRL" light will be permanently illuminated. Either remove the bulb from the dash cluster, or if the car is a 5-speed, install the ABS box from a 1992 automatic, or a 1992 non-turbo 5-speed (41 07 363).
11. The car will have no cruise control. To install the standard vacuum-type SAAB cruise system, all components (except pedal switches), wiring, and vacuum hoses must be installed from scratch. To install the throttle actuator (vacuum-sucker thing that pulls the throttle cable via a short chain), the ETS pedal potentiometer must be removed and its steel mounting peg cut off from the pedal bracket. On the one I did, I used bits of the old ETS wiring to connect the cruise bits together, i.e. the cruise ECU ended up living in the spot under the driver's seat where the ETS ECU used to live.
Some steps are a little different for 1993-1995 ETS cars with Trionic.
You definitely need a '91 LH ECU. The '92 LH ECU is missing the necessary circuitry to read the TPS signal, and to control the IAC valve. This is what causes most of the drivability problems during episodes of ETS limp-home mode.
James
Team Saabworks
posted by 209.153.195...
, Sun, 3 Sep 2006 14:29:39, Thu, 7 Sep 2006 21:06:07, Sun, 10 Sep 2006 03:02:59, Mon, 11 Sep 2006 21:21:21, Tue, 12 Sep 2006 20:47:00
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