Test M: Fuel Pump Monitor/Control
PINPOINT TEST M: FUEL PUMP MONITOR/CONTROLFlow Chart (Part 1):
Flow Chart (Part 2):
This pinpoint test is intended to diagnose the following:
- fuel pump relay
- fuel pump
- fuel pump circuitry
- inertia fuel shutoff (IFS) switch
- powertrain control module (PCM)
FP Connector
FP Connector:
FP Relay Connector
FP Relay Connector:
IFS Switch Connector
IFS Switch Connector:
PCM Connector
PCM Connector:
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M1 : PRELIMINARY DIAGNOSIS FOR DIAGNOSTIC TROUBLE CODES (DTCS) P0230, P0231, AND P0232
- Retrieve and record all DTCs.
- Record the freeze frame data.
- Clear the DTCs.
- Carry out the self-test.
- Are any DTCs retrieved?
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M2 : CHECK THE FUEL PUMP RELAY VOLTAGE CIRCUIT
NOTE: Refer to the Wiring Diagrams for the fuel pump relay coil pin locations.
- Ignition OFF.
- FP Relay connector disconnected.
- Ignition ON, engine OFF.
- Measure the voltage between:
- Is the voltage greater than 10 V?
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M3 : CHECK THE FUEL PUMP RELAY
- Carry out the fuel pump relay component test.
- Does the fuel pump relay pass the component test?
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M4 : CHECK THE FUEL PUMP RELAY CONTROL CIRCUIT FOR AN OPEN
NOTE: Refer to the Wiring Diagrams for the fuel pump relay coil pin locations.
- Ignition OFF.
- PCM connector disconnected.
- Measure the resistance between:
- Is the resistance less than 5 Ohm?
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M5 : CHECK THE FUEL PUMP RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND
- Measure the resistance between:
- Is the resistance greater than 10 kOhm?
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M6 : CHECK THE FUEL PUMP RELAY CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition ON, engine OFF.
- Measure the voltage between:
- Is any voltage indicated?
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M7 : DIAGNOSTIC TROUBLE CODE (DTC) P0231
NOTE: Diagnose and repair DTC P0230 before addressing DTC P0231.
- Ignition OFF.
- IFS Switch connector disconnected.
- Measure the resistance between:
- Is the resistance less than 5 Ohm?
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M8 : CHECK THE FUEL PUMP VOLTAGE
- Connect a non-powered test lamp between:
- Ignition ON, engine OFF.
- Does the test lamp illuminate for approximately 20 seconds?
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M9 : CHECK THE FUEL PUMP RELAY POWER CIRCUIT FOR VOLTAGE
- Ignition OFF.
- FP Relay connector disconnected.
- Ignition ON, engine OFF.
- Measure the voltage between:
- Is the voltage greater than 10 V?
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M10 : CHECK THE FUEL PUMP RELAY
- Carry out the fuel pump relay component test.
- Does the fuel pump relay pass the component test?
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M11 : CHECK THE FUEL PUMP MONITOR CIRCUIT FOR AN OPEN
- Ignition OFF.
- PCM connector disconnected.
- Measure the resistance between:
- Is the resistance less than 5 Ohm?
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M12 : DIAGNOSTIC TROUBLE CODE (DTC) P0232
NOTE: Diagnose and repair DTC P0230 before addressing DTC P0232.
- Ignition OFF.
- FP Relay connector disconnected.
- Ignition ON, engine OFF.
- Is the fuel pump on?
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M13 : CHECK THE FUEL PUMP MONITOR CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition OFF.
- PCM connector disconnected.
- FP connector disconnected.
- Ignition ON, engine OFF.
- Measure the voltage between:
- Is any voltage indicated?
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M14 : CHECK THE FUEL PUMP GROUND FOR AN OPEN
- Ignition OFF.
- FP connector disconnected.
- Measure the resistance between:
- Is the resistance less than 5 Ohm?
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M15 : CHECK THE FUEL PUMP
- Measure the resistance between:
- Is the resistance less than 5 Ohm?
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M16 : CHECK THE FUEL PUMP MONITOR CIRCUIT FOR AN OPEN
- PCM connector disconnected.
- Measure the resistance between:
- Is the resistance less than 5 Ohm?
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M17 : CHECK THE FUEL PUMP RELAY
- Carry out the fuel pump relay component test.
- Does the fuel pump relay pass the component test?
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M18 : CHECK FOR CORRECT PCM OPERATION
- Disconnect all the PCM connectors.
- Visually inspect for:
- pushed out pins
- corrosion
- Connect all the PCM connectors and make sure they seat correctly.
- Carry out the PCM self-test and verify the concern is still present.
- Is the concern still present?
