Acura RL. Instruction — page 29

Enable Conditions

ENABLE CONDITIONS

Malfunction Threshold

The change in the fuel level sensor output is 3.5% or less.

Driving Pattern

Drive for the specified mileage under Enable Conditions without refueling. (Turning the ignition switch off
is acceptable.)

Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

Diagnosis Details

Conditions for illuminating the indicator

When a malfunction is detected, the DTC and the freeze frame data are stored in the PCM memory. The
MIL does not come on.

Conditions for clearing the DTC

The DTC and the freeze frame data can be cleared by using the scan tool Clear command or by
disconnecting the battery.

DTC P0462 (121): ADVANCED DIAGNOSTICS

DTC P0462: FUEL LEVEL SENSOR (FUEL GAUGE SENDING UNIT) CIRCUIT LOW
VOLTAGE

Condition

Minimum

Maximum

Mileage

125 miles (200 km)

No active DTCs

P0462, P0463, U0073, U0155

Others

Avoid driving and stopping on a steep road

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

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Friday, June 05, 2009 2:32:04 PM

Page 113 © 2005 Mitchell Repair Information Company, LLC.

Fig. 83: Fuel Level Sensor (Low Voltage) — Circuit Diagram

General Description

The fuel level sensor (fuel gauge sending unit) is incorporated with the fuel pump and installed in the fuel
tank. Using a built-in potentiometer and float, it converts the movement of the float into electrical signals as
an output that corresponds to fuel level variations in the fuel tank. The fuel level, which is indicated by the
gauge control module, is sent to the powertrain control module (PCM) via the controller area network
(CAN). If the PCM detects a signal from the fuel level sensor (fuel gauge sending unit) below a
predetermined value for a set time or more, it detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status

MONITOR DESCRIPTION CHART

Enable Conditions

ENABLE CONDITIONS

Execution

Continuous

Sequence

None

Duration

5 seconds or more

DTC Type

One drive cycle, MIL OFF

OBD Status

N/A

Condition

Minimum

Maximum

Battery voltage

10.0 V

Ignition switch

ON

No active DTCs

P0463, U0155

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

me

Friday, June 05, 2009 2:32:04 PM

Page 114 © 2005 Mitchell Repair Information Company, LLC.

Malfunction Threshold

The fuel level sensor (fuel gauge sending unit) output voltage is 0.10 V or less for at least 5 seconds.

Diagnosis Details

Conditions for illuminating the indicator

When a malfunction is detected, the DTC and the freeze frame data are stored in the PCM memory. The
MIL does not come on.

Conditions for clearing the DTC

The DTC and the freeze frame data can be cleared by using the scan tool Clear command or by
disconnecting the battery.

DTC P0463 (121): ADVANCED DIAGNOSTICS

DTC P0463: FUEL LEVEL SENSOR (FUEL GAUGE SENDING UNIT) CIRCUIT HIGH
VOLTAGE

Fig. 84: Fuel Level Sensor (High Voltage) — Circuit Diagram

General Description

The fuel level sensor (fuel gauge sending unit) is incorporated into the fuel pump and installed in the fuel
tank. Using a built-in potentiometer and float, it converts the movement of the float to electrical signals that
correspond to fuel level variations, and it measures the remaining fuel in the fuel tank. The fuel level, which
is read by the gauge control module, is sent to the powertrain control module (PCM) via the controller area
network (CAN). If the PCM detects a signal voltage from the fuel level sensor (fuel gauge sending unit)

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

me

Friday, June 05, 2009 2:32:04 PM

Page 115 © 2005 Mitchell Repair Information Company, LLC.

above a predetermined value for a set time or more, it detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status

MONITOR DESCRIPTION CHART

Enable Conditions

ENABLE CONDITIONS

Malfunction Threshold

The fuel level sensor (fuel gauge sending unit) voltage is 4.92 V or more for at least 5 seconds.

Diagnosis Details

Conditions for illuminating the indicator

When a malfunction is detected, the DTC and the freeze frame data are stored in the PCM memory. The
MIL does not come on.

Conditions for clearing the DTC

The DTC and the freeze frame data can be cleared by using the scan tool Clear command or by
disconnecting the battery.

DTC P0480 (101): ADVANCED DIAGNOSTICS

DTC P0480: RADIATOR FAN CONTROL (RFC) SYSTEM MALFUNCTION

Execution

Continuous

Sequence

None

Duration

5 seconds or more

DTC Type

One drive cycle, MIL OFF

OBD Status

N/A

Condition

Minimum

Maximum

Battery voltage

10.0 V

Ignition switch

ON

No active DTCs

P0462, U0155

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

me

Friday, June 05, 2009 2:32:04 PM

Page 116 © 2005 Mitchell Repair Information Company, LLC.

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