Honda Element. Manual — part 26

Fig. 70: Fuel Level Sensor (Fuel Gauge Sending Unit) 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 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 engine control module (ECM)/powertrain control module (PCM) via the controller area
network (CAN). If the ECM/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

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

Ignition switch

ON

2007 Honda Element EX

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

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 ECM/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. 71: Fuel Level Sensor (Fuel Gauge Sending Unit) Circuit Diagram

General Description

No active DTCs

P0463, U0028, U0155

2007 Honda Element EX

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

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 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 engine control module (ECM)/powertrain control module (PCM) via the controller area
network (CAN). If the ECM/PCM detects a signal from the fuel level sensor (fuel gauge sending unit) 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

Enable Conditions

ENABLE CONDITIONS

Malfunction Threshold

The fuel level sensor (fuel gauge sending unit) output 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 ECM/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 P0496 (92): ADVANCED DIAGNOSTICS

DTC P0496: EVAPORATIVE EMISSION (EVAP) SYSTEM HIGH PURGE FLOW

Execution

Continuous

Sequence

None

Duration

5 seconds or more

DTC Type

One drive cycle, MIL OFF

OBD Status

N/A

Condition

Ignition switch

ON

No active DTCs

P0462, U0028, U0155

2007 Honda Element EX

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

Fig. 72: Evaporative Emission (EVAP) System Purge Flow

General Description

The fuel (vapor) vaporized in the fuel tank is stored in the canister temporarily and introduced in the engine
through the evaporative emission (EVAP) canister purge valve. The engine control module (ECM)/powertrain
control module (PCM) controls the vapor amount introduced in the engine by repeating switching the power of
the EVAP canister purge valve at a constant frequency according to the condition of the engine.

< STEP 1 >

The EVAP canister purge valve drives normally (EVAP canister purge valve OPEN OK) and detects that the
purge flow is normal when the pulse of the EVAP canister purge valve drive cycle is transmitted to fuel tank
pressure (FTP) sensor by the purge flow (pulse method).

OK determination: Pulse exists (P145C OK)



P0497 Purge flow OK



P0496 EVAP canister purge valve Open fix OK

NG determination: No pulse (P145C NG)



Either purge flow P0497 abnormality or P0496 EVAP canister purge valve OPEN failure.



In this case, classify the failure part according to < STEP 2 >.

< STEP 2 >

In case there is no pulse, it is determined either no purge flow or EVAP canister purge valve OPEN fix as
follows:

When the FTP sensor fluctuates from negative pressure condition to atmospheric pressure side after the ignition
is turned off: P0496 EVAP canister purge valve OPEN fix

2007 Honda Element EX

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element