DTC P0462: FUEL LEVEL SENDING UNIT VOLTS TOO LOW Jeep Cherokee II рестайлинг

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For circuit identification and wiring diagram, see CHEROKEE wiring diagram in WIRING DIAGRAMS article.

Note. DTC P0462: FUEL LEVEL SENDING UNIT VOLTS TOO LOW is monitored with ignition on and battery voltage more than 10.4 volts. DTC may be stored in Powertrain Control Module (PCM) if PCM senses fuel level sensor signal less than .4 volt for 4 seconds. Possible causes are: defective fuel level sensor, defective PCM, defective connector or defective wiring.

1. Turn ignition on, with engine off. Using scan tool, read FUEL LEVEL SENSOR voltage. If voltage is less than .4 volt, go to next step. If voltage is .4 volt or more, go to step 6).
2. Turn ignition off. Disconnect fuel pump module connector. Fuel pump module is located in fuel tank. Clean and/or repair connector as necessary. Turn ignition on, with engine off. Using scan tool, read FUEL LEVEL SENSOR voltage. If voltage is 9 volts or less, go to next step. If voltage is more than 9 volts, replace fuel level sensor. Fuel level sensor is located in fuel pump module. Perform TEST VER-2A.
3. Turn ignition off. Ensure fuel pump module connector is still disconnected. Disconnect PCM connectors. PCM is located in engine compartment. See PCM LOCATION table under SYSTEM DIAGNOSTICS. Clean and/or repair connectors as necessary. Using an ohmmeter, check resistance between ground and PCM connector, fuel level sensor signal circuit (Dark Blue/Light Green wire). If resistance is less than 5 ohms, repair fuel level sensor signal circuit for short to ground. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
4. Ensure ignition is off. Ensure fuel pump module and PCM connectors are still disconnected. Using ohmmeter, check resistance between PCM connector, fuel level sensor signal circuit (Dark Blue/Light Green wire) and sensor ground circuit (Brown/Yellow wire). If resistance is less than 5 ohms, repair fuel level sensor signal circuit for short to sensor ground circuit. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
5. At this time, PCM is assumed to be defective. Replace PCM. Perform TEST VER-2A.
6. Turn ignition on, with engine off. Using scan tool, monitor FUEL LEVEL SENSOR voltage while wiggling fuel pump module connector and wiring harness. Fuel pump module is located in fuel tank. If voltage changes while wiggling wiring harness, repair wiring harness where wiggling caused voltage to change. Perform TEST VER-2A. If voltage does not change while wiggling wiring harness, go to next step.
7. Turn ignition off. Visually inspect related connectors and wiring harness for damage. Repair connectors and wiring harness as necessary. Perform TEST VER-2A. If connectors and wiring harness are okay, test is complete.