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(P0451) FUEL TANK PRESSURE SENSOR PERFORMANCE (CONTINUED) 13. FUEL TANK PRESSURE SENSOR Turn the ignition off. Disconnect the Fuel Tank Pressure Sensor harness connector. Note: Check connectors — Clean/repair as necessary. Connect a fused jumper wire between the Fuel Tank Pressure Sensor With the DRB III T , read the GAS TANK PRES DIFF. Note: Remove the fused jumper wire when this step is complete. Is the Fuel Tank Pressure above +30 hPa (0.435 psi)? Yes >> Replace the Fuel Tank Pressure Sensor.(Refer to 14 - FUEL SYSTEM/FUEL DELIVERY/FUEL LEVEL SENDING Perform POWERTRAIN VERIFICATION TEST - VER 2. No >> Go To 14 14. FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND Turn the ignition off. Disconnect the PCM C4 harness connector. Note: Check connectors — Clean/repair as necessary. Is the resistance above 100 kohms? Yes >> Go To 15 No >> Repair the Fuel Tank Pressure Sensor Signal circuit for a short to ground. Perform POWERTRAIN VERIFICATION TEST - VER 2. ZH ENGINE - ELECTRICAL DIAGNOSTICS 9 - 473 |