FI SYSTEM DIAGNOSIS 4-79 “C41” (P0230-H/L) FP RELAY CIRCUIT MALFUNCTION DETECTED CONDITION POSSIBLE CAUSE C41 No voltage is applied to fuel pump • Fuel pump relay circuit open or short although fuel pump relay is turned ON, • Fuel pump relay malfunction or voltage is applied to fuel pump, • ECM malfunction although fuel pump relay is turned OFF. P0230 Voltage is applied to fuel pump although • Fuel pump relay switch circuit shorted to power H fuel pump relay is turned OFF. source • Faulty fuel pump relay (switch side) L No voltage is applied to fuel pump • Fuel pump relay coil circuit open or short although fuel pump relay is turned ON. • Faulty fuel pump relay (coil side) ECM M Fuel pump Engine stop switch To side-stand Ignition VM Y/R R/BI switch Side-stand switch FP Relay Y/B O/W E relay Fuel pump L relay P INSPECTION M 1 Step 1 (When indicating C41:) 1) Turn the ignition switch OFF. A 2) Remove the front seat. (8-7) S 3) Check the FP relay coupler for loose or poor contacts. If OK, then check the FP relay. (5-6) Is the FP relay OK? 1 • Y/B or O/W wire open or short or poor ] con- ECM coupler (Harness side) nection (Black) (Gray) • Y/R or R/Bl wire open, shorted or poor W con- nection YES • If wire and connection are OK, intermittent trou- ble or faulty ECM. • Recheck each terminal and wire harness for open circuit and poor connection. • Replace the ECM with a known good one, and inspect it again. NO Replace the FP relay with a new one.