DTC P0463: FUEL LEVEL SENDING UNIT VOLTS TOO HIGH
1. Turn ignition on with engine off. Using scan tool, read fuel level sensor voltage. If fuel level sensor voltage is more than 9.4 volts, go to next step. If fuel level sensor voltage is 9.4 volts or less, go to step 5 .
2. Turn ignition off. Disconnect fuel pump module connector. Fuel pump module is located on top of fuel tank and contains fuel level sensor along with fuel supply and return line fittings. Fuel pump module may also be referred to as fuel tank module. Connect jumper wire between terminals No. 1 (Black wire) and No. 3 (Dark Blue/White wire) on fuel pump module connector. Turn ignition on with engine off. Using scan tool, read fuel level sensor voltage. If fuel level sensor voltage one volt or more, go to next step. If fuel level sensor voltage is less than one volt, replace fuel level sensor located on fuel pump module. Perform TEST VER-2A .
3. Turn ignition off. Disconnect jumper wire from terminal No. 1 (Black wire) on fuel pump module connector and reconnect jumper wire to good ground. Ensure other end of jumper wire is still connected to terminal No. 3 (Dark Blue/White wire) on fuel pump module connector. Turn ignition on with engine off. Using scan tool, read fuel level sensor voltage. If fuel level sensor voltage one volt or more, go to next step. If fuel level sensor voltage is less than one volt, repair open on Black wire between fuel pump module and ground connection. Ground connection located at driver's side front corner of engine compartment, on fender inner panel, near windshield washer fluid reservoir. Perform TEST VER-2A .
4. Turn ignition off. Ensure fuel pump module connector is still disconnected. Disconnect PCM connectors. PCM is located at passenger's side rear corner of engine compartment. Using ohmmeter, check resistance between terminal No. 3 (Dark Blue/White wire) on fuel pump module connector and terminal No. 26 (Dark Blue/White wire) on PCM connector C3. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A . If resistance is 5 ohms or more, repair open on Dark Blue/White wire between PCM and fuel pump module. Perform TEST VER-2A .
5. Ensure ignition is on with engine off. Using scan tool, monitor fuel level sensor voltage while wiggling wiring harness and connectors between fuel pump module and PCM. Fuel pump module is located on top of fuel tank and contains fuel level sending unit along with fuel supply and return line fittings. Fuel pump module may also be referred to as fuel tank module. PCM is located at passenger's side rear corner of engine compartment. If fuel level sensor voltage does not change while wiggling wiring harness and connectors, go to next step. If fuel level sensor voltage changes while wiggling wiring harness and connectors, repair wiring or connectors as necessary. Perform TEST VER-2A .
6. Turn ignition off. Inspect wiring harness and connectors between fuel pump module and PCM. If no problems exist, test is complete. If any problems exist, repair wiring or connectors as necessary. Perform TEST VER-2A .