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7 CHECK MAFS INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Check harness continuity between MAFS terminal 1 and ECM terminal 61. Refer to Wiring Diagram. Continuity should exist. 2. Also check harness for short to ground and short to power. OK or NG OK © GO TO 8. NG © Repair open circuit or short to ground or short to power in harness or connectors. 8 CHECK MASS AIR FLOW SENSOR 1. Reconnect harness connectors disconnected. SEF298X 4. If the voltage is out of specification, disconnect MAFS harness connector and connect it again. Then repeat above check. OK or NG OK © GO TO 9. NG © Replace mass air flow sensor. 9 CHECK MAFS SHIELD CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch “OFF”. I Continuity between joint connector terminal 1 and ground I Joint connector-18 Continuity should exist. 4. Also check harness for short to power. OK or NG OK © GO TO 10. NG © Repair open circuit or short to power in harness or connectors. 10 CHECK INTERMITTENT INCIDENT Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-144. © INSPECTION END GI MA EM LC FE AT AX SU BR ST RS BT HA SC EL IDX DTC P0100 MASS AIR FLOW SENSOR (MAFS) Diagnostic Procedure (Cont’d) EC-159 |