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3 DETECT MALFUNCTIONING PART Check the following. I 15A fuse I Harness for open or short between fuse and fuel pump relay © Repair harness or connectors. 4 CHECK POWER GROUND CIRCUIT 1. Turn ignition switch “OFF”. SEF299W 3. Check harness continuity between fuel pump harness connector terminal 2 and body ground, terminal 1 and fuel pump relay connector terminal 9J. Continuity should exist. 4. Also check harness for short to ground and short to power. OK or NG OK © GO TO 6. NG © GO TO 5. 5 DETECT MALFUNCTIONING PART Check the following. I Harness for open or short between fuel pump and body ground I Harness for open or short between fuel pump and fuel pump relay © Repair open circuit or short to ground or short to power in harness or connectors. 6 CHECK OUTPUT SIGNAL CIRCUIT 1. Disconnect ECM harness connector. Refer to wiring diagram. Continuity should exist. 3. Also check harness for short to ground and short to power. OK or NG OK © GO TO 8. NG © GO TO 7. 7 DETECT MALFUNCTIONING PART Check the following. I Harness connectors M50, F104 (CVT: M81, F115) I Harness for open or short between ECM and fuel pump relay NG © Repair open circuit or short to ground or short to power in harness or connectors. FUEL PUMP SR20DE Diagnostic Procedure (Cont’d) EC-319 |