DTC P0605: INTERNAL ECM MALFUNCTION — Saab 9-3 I (1998-2003)

DTC P0605: INTERNAL ECM MALFUNCTION Saab 9-3 I

Replace ECM. See «ENGINE CONTROL MODULE (ECM)»(ref-2997-S17585372472000041700000) under COMPUTERIZED ENGINE CONTROLS in REMOVAL, OVERHAUL & INSTALLATION article. Connect TECH 2 scan tool to Data Link Connector (DLC). Turn ignition on. Clear DTCs from Trionic T-7 Engine Management System. Turn ignition off. Wait 10 seconds, then reset limp-home mechanism. See «RESETTING LIMP-HOME SOLENOID»(ref-2998-S16464387302000041700000) under TESTING & REPAIR PROCEDURE. Clear DTCs from all systems. Go to next step.
If diagnosing DTC P1602-P1608, P1613 or P1621, and you were sent here from DTC P0507, go back to step 7 of DTC P0507 diagnostic procedure. Otherwise, unplug EVAP canister purge valve harness connector. Connect SST 86 11 857 test light (Схема №5) or equivalent to both terminals of purge valve harness connector to prevent DTC from setting during testing. Start engine and allow it to idle until coolant temperature exceeds 140°F (60°C). Use scan tool to select READ VALUE: PURGE ADAPTATION. If scan tool value is between -15 percent and +15 percent, go to next step. If scan tool value is not as specified, turn ignition off and remove test light. Reconnect purge valve harness connector. Problem is still present.
Turn ignition off and remove test light. Reconnect purge valve harness connector. Test drive vehicle between 37-62 MPH with constant throttle applied. Read MULTIPLICATIVE ADAPTATION value. Wait until reading changes, then change speed or stop if desired. Wait until scan tool reading stabilizes. If scan tool value is between -15 percent and +15 percent, system is operating normally. Clear all system DTCs. If scan tool value is not as specified, problem is still present.

DTC P0605: INTERNAL ECM MALFUNCTION Saab 9-3 I

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