Diagnostic Procedure

1995 Saturn SL1 AutomaticSECTION Diagnostic Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1996 Saturn SW2, 1996 Saturn SW1, 1996 Saturn SL2, 1996 Saturn SL1, and 1996 Saturn SC2. However, it is still accessible from the selected car via links, so may be relevant.
  1. Using scan tool, read transmission oil temperature. If scan tool temperature reading is above -35°F (-37°C), problem is intermittent. Go to next step.
  2. Disconnect transmission oil temperature sensor connector. Sensor is between pressure filter and cooler line connection. Connect jumper wire between harness connector terminals. If scan tool reads greater than 284°F (140°C), possible poor connection exists or sensor is faulty. Using ohmmeter, inspect sensor and compare readings with TEMPERATURE SENSOR SPECIFICATIONS table. If scan tool reads 284°F (140°C) or less, go to next step.
    TEMPERATURE SENSOR SPECIFICATIONS

    Temperature °F (°C) Ohms
    -40 (-40) 93630
    -20 (-29) 46352
    0 (-18) 24094
    20 (-7) 13111
    40 (4) 7436
    60 (16) 4180
    80 (27) 2554
    100 (38) 1609
    120 (49) 1043
    140 (60) 693
    160 (72) 456
    180 (83) 318
    200 (94) 226
    220 (105) 165
    248 (120) 109
    284 (140) 65
  3. Connect jumper wire between ground and sensor harness connector terminal "A" (Orange/Black wire). If scan tool reads greater than 284°F (140°C), Black wire (terminal "B") is open or PCM is faulty. If scan tool reads 284°F (140°C) or less, Tan/White wire is open or PCM is faulty.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.