LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 1998 >> Celica 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Tests W/Codes >> Self-Diagnostic Tests >> DTC P0105: Manifold Absolute Pressure (Map)/Barometric Pressure Sensor Circuit >> Diagnosis & Repair

Diagnosis & Repair

  1. Connect scan tool to DLC No. 3 connector. See Fig 1. Turn ignition on. Using scan tool, read MAP sensor value. If reading is same as atmospheric pressure, go to next step. If reading is not same as atmospheric pressure, check component and ECM connections for an intermittent problem.
    Fig 1: Connecting Scan Tool To Data Link Connector (DLC) No. 3
    G97D06188Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Access ECM below passenger's side of instrument panel, underneath carpet near center console. Turn ignition on. Backprobing ECM connector, measure voltage between terminals No. 1 (Red wire) and No. 9 (Brown wire) at ECM E6 connector. See Fig 2. If voltage is 4.5-5.5 volts, go to next step. If voltage is not 4.5-5.5 volts, replace ECM.
  3. Backprobing ECM connector, measure voltage between terminals No. 2 (Blue wire) and No. 9 (Brown wire) at ECM E6 connector. If voltage is 3.3-3.9 volts, replace ECM. If voltage is not 3.3-3.9 volts, go to next step.
  4. Check for open or short circuit in wiring harness between MAP sensor and ECM. See appropriate wiring diagram in WIRING DIAGRAMS article. Repair wiring as necessary. If wiring harness is okay, replace MAP sensor.
Fig 2: Identifying Engine Control Module (ECM) Connector Terminals
G98A12302Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
scientia non olet · About LEMON Manuals