LEMON Manuals: Even more car manuals for everyone
Home >> Jaguar >> 1996 >> XJS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self Diagnostics >> Self-Diagnostic Tests >> DTC P0112: IAT Sensor Input Low

DTC P0112: IAT Sensor Input Low

NOTE: After each repair, clear DTCs. See CLEARING CODES/PCM RESET PROCEDURE  under SELF-DIAGNOSTIC SYSTEM. Turn ignition off and then on. Read DTCs to verify repair is complete. For DLC and PCM connector terminal identification, see CONNECTOR IDENTIFICATION  . For wiring diagrams, see WIRING DIAGRAMS  .
  1. Using scan tool, read DTCs. If DTC P0112 is present, go to next step. If DTC P1112 is not present, problem may be intermittent. See the following:
    • For 1995 models, see INTERMITTENTS in TESTS W/O CODES article.
    • For 1996 models, see INTERMITTENTS in TESTS W/O CODES article.
    • For 1997 XJR models, see INTERMITTENTS in TESTS W/O CODES article.
    • For 1997 XJ6 models, see INTERMITTENTS in TESTS W/O CODES article.
  2. Using scan tool, monitor PID 0FH (IAT TEMP RANGE). Using a thermometer, check ambient temperature at IAT sensor. If scan tool reading and thermometer reading agree, go to step  7 . If readings do not agree, go to next step.
  3. Check air intake system for restrictions or damage. Repair air intake system as necessary. If air intake system is okay, turn ignition off and go to next step.
  4. Ensure IAT sensor harness and connector are not damaged and connections are okay. Repair as necessary. If harness and connectors are okay, go to next step.
  5. Disconnect IAT sensor connector. Using DVOM, check continuity of Blue/Black and Black/Green wires between IAT sensor connector and PCM connector. Repair appropriate wire as necessary. If wiring is okay, go to next step.
  6. Check Blue/Black wire for short to Black/Green wire at IAT sensor harness connector. Repair wiring as necessary. If wiring is okay, go to next step.
  7. Check resistance across IAT sensor terminals. Ensure resistance increases as temperature rises. If sensor does not test as specified, replace IAT sensor. If sensor tests as specified, go to next step.
  8. Substitute a known-good IAT sensor. Clear DTCs. Turn ignition off and then on. Read DTCs. If DTC P0112 is not present, replace original IAT sensor. Repair is complete. If DTC P0112 is still present, replace PCM.
scientia non olet · About LEMON Manuals