LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 1995 >> Avalon XLS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Testing >> Code P0110 - Intake Air Temperature Sensor Circuit >> Diagnosis & Repair
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnosis & Repair

  1. Connect scan tester to DLC-3. See Figure. Turn ignition on. Turn on scan tester. Monitor IAT sensor temperature. If temperature displayed is same as outside temperature, inspect component and ECM connections. Problem is intermittent.
  2. If temperature displayed is 284°F (140°C), go to step  5. If temperature displayed is -40°F (-40°C), turn ignition off. Disconnect MAF sensor harness connector. Using jumper wire, connect MAF harness connector terminals No. 3 and 4. See Figure. Turn ignition on. Monitor IAT sensor temperature on scan tester.
  3. If temperature displayed is 284°F (140°C), replace MAF sensor and retest. If temperature displayed is NOT 284°F (140°C), turn ignition off. Remove jumper wire. Access ECM behind glove box. Connect jumper wire between ECM connector "E7" terminal No. 22 (E2) and No. 21 (THA). See Figure.
  4. If temperature displayed on scan tester is 284°F (140°C) or more, inspect and repair circuits between MAF harness connector and ECM. See wiring diagram in the WIRING DIAGRAMS article. If temperature displayed on scan tester is NOT 284°F (140°C) or more, replace ECM and retest.
  5. Turn ignition off. Disconnect MAF sensor harness connector. Turn ignition on. If temperature displayed on scan tester is -40°F (-40°C), replace MAF sensor and retest. If temperature displayed is NOT -40°F (-40°C), turn ignition off.
  6. Access ECM behind glove box. Disconnect ECM harness connector "E7". See Figure. Turn ignition on. If temperature displayed is -40°F (-40°C), inspect and repair circuits between MAF sensor and ECM for short. See wiring diagram in the WIRING DIAGRAMS article. If temperature displayed by scan tester is NOT -40°F (-40°C), replace ECM and retest.
scientia non olet · About LEMON Manuals