Honda Element. Manual — part 22

runs.

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

DTC P0453 (91): ADVANCED DIAGNOSTICS

DTC P0453: FUEL TANK PRESSURE (FTP) SENSOR CIRCUIT HIGH VOLTAGE

Fig. 60: Fuel Tank Pressure Sensor - Circuit Diagram

Fig. 61: Fuel Tank Pressure (FTP) Sensor Output Voltage - Graph

2007 Honda Element EX

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

Fig. 62: Fuel Tank Pressure - Graph

General Description

The fuel tank pressure (FTP) sensor is installed on the evaporative emission (EVAP) canister and detects the
fuel tank pressure. The FTP sensor is used to detect leaks in the EVAP system.

The engine control module (ECM)/powertrain control module (PCM) monitors the FTP sensor output voltage.
The FTP sensor output voltage rises as the fuel tank pressure increases. Conversely, the FTP sensor output
voltage drops as the fuel tank pressure decreases. If the FTP sensor output voltage is higher than a target value
for a set time after starting the engine in a cold condition, the ECM/PCM detects a malfunction and stores a
DTC.

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

MONITOR DESCRIPTION

Enable Conditions

ENABLE CONDITIONS

Malfunction Threshold

The output from the fuel tank pressure sensor is more than 8 kPa (2.2 in.Hg, 55 mmHg) for at least 3 seconds.

Execution

Once per driving cycle

Sequence

None

Duration

3 seconds or more

DTC Type

Two drive cycles, MIL ON

OBD Status

PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Condition

Minimum

Maximum

Elapsed time after starting the engine

2 seconds

-

Other

At idle

2007 Honda Element EX

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

Driving Pattern

Start the engine in a cold condition, and let it idle until the radiator fan comes on.

Diagnosis Details

Conditions for illuminating the MIL

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM/PCM
memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the
freeze frame data are stored.

Conditions for clearing the MIL

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic
runs.

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

DTC P0455 (90): ADVANCED DIAGNOSTICS

DTC P0455: EVAPORATIVE EMISSION (EVAP) SYSTEM LARGE LEAK DETECTED

Fig. 63: Evaporative Emission (EVAP) System Diagram

2007 Honda Element EX

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

Fig. 64: Evaporative Emission (EVAP) System Diagnosis Execution

General Description

The evaporative emission (EVAP) leak detection system uses an engine off natural vacuum (EONV) method.
The EONV method detects leakage from the change in fuel tank pressure via the fuel tank pressure (FTP)
sensor with the engine off.

Here is an overview of the malfunction detection for the EONV method:

Step 1: Judgement of detection of 0.09 inch leak as normal operation

Step 2: Judgement of detection of 0.02 inch leak as normal operation

Step 3: Detection of 0.02 inch leak

Step 4: Detection of atmospheric air open failure

Step 5: Flickering of the FTP sensor

< Step 1, 2 and 3 proceed simultaneously. Step 4 and 5 proceed simultaneously. >

Step 1:

After the engine has stopped, the engine control module (ECM)/powertrain control module (PCM) monitors the
variation of the FTP sensor output to detect "no 0.09 inch leak" depending on the variation corresponding to the
pressure inside the fuel tank.



If the variation corresponding to the pressure is less than a specified value and continues for a specified
duration, it is identified as a malfunction of "0.09 inch leak" and the diagnosis completes.

2007 Honda Element EX

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element