DTC P0100 MASS AIR FLOW SENSOR (MAFS); Diagnostic Procedure (Cont'd); Steps 5-8
EF & EC-7080prose procedureDiagnostic Procedure (Cont'd)
CG10, CGA3
Step 5 — CHECK GROUND CIRCUIT
- 1Turn ignition switch "OFF".
- 2Disconnect ECM harness connector.
- 3Check harness continuity between mass air flow sensor harness connector terminal 3 and ECM terminal 14. Refer to wiring diagram. Continuity should exist.
- 4Also check harness for short to ground and short to power.
- 5OK or NG: - OK → GO TO 6. - NG → Repair open circuit or short to ground or short to power in harness or connectors.
Step 6 — CHECK INPUT SIGNAL CIRCUIT
- 1Check harness continuity between mass air flow sensor harness connector terminal 5 and ECM terminal 41. Refer to wiring diagram. Continuity should exist.
- 2Also check harness for short to ground and short to power.
- 3OK or NG: - OK → GO TO 7. - NG → Repair open circuit or short to ground or short to power in harness or connectors.
Step 7 — CHECK MASS AIR FLOW SENSOR
- 1Refer to "Component Inspection", EC-7081.
- 2OK or NG: - OK → GO TO 8. - NG → Replace mass air flow sensor.
Step 8 — CHECK INTERMITTENT INCIDENT
- 1Perform "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT", EC-7070.
- 2→ INSPECTION END.
See also
EC-7081 · EC-7070