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Home >> Chevrolet >> 2000 >> Tracker 4D Utility, 4WD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Engine Component Tests >> Miscellaneous Controls >> Power Steering Pressure Switch Circuit Diagnosis
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Power Steering Pressure Switch Circuit Diagnosis

  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK in appropriate SELF-DIAGNOSTICS article. Go to next step.
  2. Start and warm engine to normal operating temperature. Turn off all accessories. Using scan tool, monitor PSP switch. Turn steering wheel all the way to the right, and then all the way to the left. If scan tool indicates ON when steering wheel is turned all the way in either direction, PSP switch is operating properly. If scan tool does not indicate ON when steering wheel is turned all the way in either direction, go to next step.
  3. Turn ignition on, engine off. Disconnect PSP switch connector. Using DVOM, measure voltage between ground and PSP switch connector terminal (harness side). If battery voltage exists, go to next step. If battery voltage does not exist, go to step  5 .
  4. Using a test light connected to battery voltage, probe PSP switch connector terminal (component side). Start engine. Observe test light while turning steering wheel all the way to the right, and then all the way to the left. If test light illuminates when steering wheel is turned all the way in either direction, check for shorted PSP switch, incorrectly calibrated PSP switch or faulty ground in PSP switch. If test light does not illuminate when steering wheel is turned all the way in either direction, go to step  6 .
  5. Check for open or short to ground in PSP switch signal circuit between PSP switch and PCM. See appropriate wiring diagram in WIRING DIAGRAMS article. If problem exists, repair as necessary and go to step  9 . If problem does not exist, go to step  8 .
  6. Check for a poor ground connection at power steering pump. If problem exists, repair as necessary and go to step  9 . If problem does not exist, go to next step.
  7. Replace PSP switch. After repairs, go to step  9 .
  8. Replace PCM. After repairs, go to next step.
  9. Operate vehicle within conditions under which original symptom was observed. System should operate properly. If system does not operate properly, check for shorted PSP switch, incorrectly calibrated PSP switch or faulty ground in PSP switch.
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