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Home >> Isuzu >> 1999 >> Rodeo LS, 2.2 D >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - Tests (2.2L) >> Diagnostic Trouble Code Identification >> DTC P0107: Map Sensor Circuit Low Input >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform On-Board Diagnostic II (OBD-II) system check. See SELF-DIAGNOSTICS - INTRODUCTION article. After performing OBD system check, go to next step.
  2. Turn ignition on. With throttle closed, observe MAP value on scan tool. If MAP value indicates zero volts and 10.3 kPa (at sea level), go to step  4 . If MAP value does not indicate zero volts and 10.3 kPa, go to next step.
  3. With ignition on and engine off, review and record FAILURE RECORDS data on scan tool. Operate vehicle within FAILURE RECORDS conditions specified. Monitor SPECIFIC DTC information. If scan tool indicates DTC P0107 failed, go to next step. If scan tool does not indicate DTC P0107 failed, see DIAGNOSTIC AIDS  .
  4. Turn ignition off. Disconnect MAP sensor. Using a fused jumper wire, connect 5-volt reference circuit to MAP sensor input circuit at MAP sensor connector. Turn ignition on. Observe MAP value displayed on scan tool. If reading is about 5 volts and 104 kPa, go to step  10 . If reading is not as specified, go to next step.
  5. Remove jumper wire. Using a test light connected to battery voltage, probe MAP sensor input terminal. Observe MAP value displayed on scan tool. If reading is about 5 volts and 104 kPa, go to next step. If reading is not as specified, go to step  8 .
  6. Turn ignition off. Disconnect PCM harness connectors. Check continuity between appropriate PCM harness connector terminal and MAP sensor 5-volt reference terminal. If continuity does not exist, locate and repair open or short as necessary. Retest system. If continuity exists, go to next step.
  7. Inspect PCM harness connector terminals for damage or poor connection. Repair as necessary. If terminals are okay, go to step  11 .
  8. Turn ignition off. Disconnect PCM harness connectors. Using a DVOM, check MAP sensor input between MAP sensor connector and appropriate PCM harness connector terminal for an open or shorted condition. If an open or shorted condition is indicated, locate and repair as necessary. If MAP sensor input circuit is okay, go to next step.
  9. Inspect MAP sensor and PCM harness connectors for damaged terminals or poor terminal connection. Repair as necessary and retest system. If terminals are okay and making good terminal contact, go to next step.
  10. Replace MAP sensor and retest system.
  11. Replace PCM. Program replacement PCM using required equipment. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION. Retest system.
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