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Home >> Saab >> 1993 >> 9000 CS, 2.3 M, Standard >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Diagnosis & Testing >> Trouble Code 24791: Pump Does Not Operate Despite Control

Trouble Code 24791: Pump Does Not Operate Despite Control

SIGNAL

  1. Ensure ignition is off. Connect breakout box to ECU connector. Check 30-amp ABS fuse and replace as necessary. Turn ignition on. Ensure battery voltage is present at pump relay terminal No. 30 (Red wire) and battery ground is present at pump relay terminal No. 87 (Yellow wire). If voltage and ground are not to specification, repair wiring. If voltage and ground are to specification, go to next step.
  2. Activate pump by jumping breakout box pins No. 1, 34, and 15 for a maximum of 2 minutes. If pump does not operate, check pump and wiring. If pump operates, go to next step.
  3. Check that ABS pump relay clicks. If relay clicks, go to next step. If relay does not click, replace relay.
  4. Set voltmeter to AC scale. Connect voltmeter between breakout box pins No. 31 and 49. With pump motor running, approximately .7 volts AC should be present. With motor off, zero volts should be present. Check voltage at relay terminal No. 2 (Yellow wire) with relay energized. If battery voltage is present, check pump motor ground. If pump motor ground is okay, replace pump motor.
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