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DTC P1240: THROTTLE MOTOR SHORT CIRCUIT Saab 9-3 I

Testing & Diagnostics ~268 words
  1. Disconnect throttle body harness connector. Connect SST 86 11 857 test light (Схема №5) or equivalent to throttle body harness connector terminals No. 5 (Red/Blue wire) and 10 (Orange/Green wire). (Схема №15) Connect TECH 2 scan tool to Data Link Connector (DLC). Turn ignition on. Select ACTIVATE: THROTTLE MOTOR PWM TEST. The test light should alternate between green and red. If test light operates as specified, replace throttle body and go to step 3. See «THROTTLE BODY»(ref-2997-S11301002242000041700000) under FUEL SYSTEM in REMOVAL, OVERHAUL & INSTALLATION article. If test light does not operate as specified, go to next step. NOTE: Limp-home mechanism must be reset after all DTCs have been erased, otherwise limp-home solenoid will be activated.
  2. Check for faulty circuit between throttle body harness connector terminal No. 5 and ECM harness connector terminal No. 48 (Red/Blue wire). Check for faulty circuit between throttle body harness connector terminal No. 10 and ECM harness connector terminal No. 24 (Orange/Green wire). (Схема №1)for ECM location. (Схема №7)for ECM terminal identification. See WIRING DIAGRAMS article. Repair as necessary and go to next step.
  3. Turn ignition on. Use scan tool to clear Trionic T-7 Engine Management System DTCs. Turn ignition off. Wait 10 seconds. Reset limp-home mechanism. See «RESETTING LIMP-HOME SOLENOID»(ref-2998-S16464387302000041700000) under TESTING & REPAIR PROCEDURE. Use scan tool to clear all system DTCs. Drive vehicle for 5 minutes under varying loads and engine RPM. Recheck for any stored DTCs. If DTC P1240 is present, substitute known good ECM and retest system. See «ENGINE CONTROL MODULE (ECM)»(ref-2997-S17585372472000041700000) under COMPUTERIZED ENGINE CONTROLS in REMOVAL, OVERHAUL & INSTALLATION article.

More articles — Engine Controls - Self-Diagnostics - Trionic T7 Fuel Control System