LEMON Manuals: Even more car manuals for everyone
Home >> Suzuki >> 2001 >> XL-7 Limited >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0136: Ho2S Bank No. 1 (Left Bank) Sensor No. 2 (B1 S2) Circuit Malfunction >> Diagnosis & Repair Procedure

Diagnosis & Repair Procedure

  1. Perform DTC CONFIRMATION TEST . If DTC P0136 is set, go to next step. If DTC P0136 is not set, problem is intermittent. System is okay at this time. See TROUBLE SHOOTING - NO CODES article.
  2. Turn ignition off. Connect scan tool. Drive vehicle for at least 2 minutes at 35 MPH or greater. While revving engine, observe HO2S B1 S2 parameter on scan tool display. If parameter varies above and below .3 volts, go to step  5. If parameter does not vary above and below .3 volts, go to next step.
  3. Turn ignition off. Disconnect HO2S B1 S2 connector. Start engine. Measure voltage between HO2S B1 S2 terminals No. 1 (Gray/Yellow wire) and No. 2 (Red/Black wire) while revving engine. If parameter varies above and below .3 volts, go to next step. If parameter does not vary above and below .3 volts, replace HO2S B1 S2 and go to DTC CONFIRMATION TEST .
  4. Check for short or open in Gray/Yellow wire and Red/Black wire between HO2S B1 S2 and PCM 26-pin connector C51-3 terminals No. 25 and No. 22. See WIRING DIAGRAMS article. Repair as necessary. If wires are okay, replace PCM and go to DTC CONFIRMATION TEST .
  5. Start and run engine at 2000 RPM for one minute. Reduce engine speed. With engine idling, using scan tool, check short term fuel trim value. If value is between -20 and +20 percent, problem is intermittent. System is okay at this time. See TROUBLE SHOOTING - NO CODES article. Go to next step.
  6. If intermittent problem is not found, replace PCM and go to DTC CONFIRMATION TEST . If value is not between -20 and +20 percent, go to DTC P0171: TOTAL LEFT BANK FUEL TRIM IS GREATER THAN ALLOWED SPECIFICATION, OR DTC P0172: TOTAL LEFT BANK FUEL TRIM IS LESS THAN ALLOWED SPECIFICATION  test.
scientia non olet · About LEMON Manuals