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Home >> Oldsmobile >> 1992 >> Cutlass Cruiser SL, 4T60/ME9 >> Repair and Diagnosis >> External Pages >> Different car >> Section 11 (Engine Controls - System/Component Tests) >> Ignition System (Exc. C3I) >> Timing Control Systems >> Electronic Spark Control (ESC) Retard System, Without ESC Controller (C-5)

Electronic Spark Control (ESC) Retard System, Without ESC Controller (C-5)

WARNING: This page does not describe the selected car, but rather 34 other vehicles, including the 1991 Pontiac Sunbird, 1991 Pontiac Grand Prix, 1991 Pontiac Grand Am, 1991 Pontiac Firebird, and 1991 Pontiac Bonneville. However, it is still accessible from the selected car via links, so may be relevant.
  1. An open or short circuit on the ESC wire to the ECM will set a related trouble code. A false detonation signal will not cause ECM to set a code.
  2. If a "Scan" tester is available, connect it to the ALDL connector. Tap on engine next to knock sensor and note "knock" parameter. Knock should be indicated on "Scan" tester.
  3. If a "Scan" tester is not available, connect tachometer to engine. Start engine and hold above idle. Using a metal object, tap on engine close to knock sensor. A noticeable decrease in engine RPM should occur. If no RPM decrease occurred, check knock sensor to ECM circuit.
  4. On vehicles equipped with automatic transmission, it may be necessary to place transmission in Drive for timing change to occur. Also, refer to KNOCK SENSOR under ENGINE SENSORS & SWITCHES in this article.
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