Fault Codes 2/44261, 2/44290 & 2/44291 (Speedometer Signal Absent Or Faulty)

1993 Saab 9000 CD, 2.3 B, StandardSECTION Fault Codes 2/44261, 2/44290 & 2/44291 (Speedometer Signal Absent Or Faulty)
  1. Connect Adapter Lead (8611048) and ISAT to Black diagnostic connector under front passenger's seat. Enter ISAT command Code 280. Current speed should now be displayed on ISAT. If not, check Green/Red and Green wires between speed sensor terminal No. 2 and ETS ECU terminal No. 10. If wires are okay, go to next step.
  2. Check speed pulses to ETS ECU terminal No. 10 (Green/Red wire) with wheels alternately rotating and stationary. With wheels stationary, signal voltage should be zero or 12 volts (depending on wheel position). With wheels turning, signal voltage should be about 6 volts DC.
  3. Check if speedometer is operating correctly. If speedometer does not operate correctly, disconnect speedometer 2-pin connector. Set voltmeter to AC scale. Measure signal voltage from speed sensor (at transmission). Signal level should increase within 0-5 volt range as speed increases.
  4. Ensure Electronic Display Unit (EDU) is operating correctly. If EDU does not operate correctly, check if voltage is present at speed sensor terminal No. 1 (Green/White wire). Ensure speed sensor terminal No. 3 (Black wire) is grounded. If voltages and grounds are okay, replace ETS ECU. If problem still persists, replace TC/ABS ECU.
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
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