Acura RL. Instruction — page 31

The malfunction detection is done during EVAP system leak detection (P0442, P0455, P0456).

The powertrain control module (PCM) monitors the fuel tank pressure (FTP) sensor output. If the FTP
sensor output does not indicate the prescribed negative pressure when purging, the PCM detects a
malfunction and a DTC is stored.

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

MONITOR DESCRIPTION CHART

Enable Conditions

ENABLE CONDITIONS

* : Initial engine coolant temperature minus initial intake air temperature

** : Initial intake air temperature minus current intake air temperature

Malfunction Threshold

The output from the fuel tank pressure sensor is at least -0.1 kPa (-0.03 in.Hg, -1 mmHg) for up to 45

Execution

Once per driving cycle

Sequence

None

Duration

45 seconds or less

DTC Type

Two drive cycles, MIL ON

OBD Status

N/A

Condition

Minimum

Maximum

Initial engine coolant temperature 40°F (5°C)

Initial intake air temperature

40°F (5°C)

Engine coolant temperature

156°F (69°C)

212 °F (100 °C)

Engine coolant temperature
before EVAP purge control starts

140°F (60°C)

Vehicle speed

7 mph (10 km/h)

Battery voltage

10.5 V

Fuel trim

0.73

1.47

Fuel feedback

Closed loop at stoichiometric

No active DTCs

P0107, P0108, P0111, P0112, P0113, P0116, P0117, P0118,
P0125, P0134, P0135, P0154, P0155, P0335, P0339, P0443,
P0451, P0452, P0453, P0496, P0498, P0499, P1109, P1116,
P1128, P1129, P1172, P1174, P1454, P2195, P2197, P2227,
P2228, P2229, P2237, P2238, P2240, P2241, P2243, P2245,
P2247, P2249, P2251, P2252, P2254, P2255, P2422, P2627,
P2628, P2630, P2631

Others

Other than when there is excessive vapor generation (fuel level is
not full)
Avoid abrupt acceleration, deceleration, and turns
Test-drive on a flat road to avoid misdetection
No refueling is required

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

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Page 121 © 2005 Mitchell Repair Information Company, LLC.

seconds.

Confirmation Procedure with the HDS

Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.

Driving Pattern

1. After the vehicle has been left for an appropriate amount of time as specified, with the engine coolant

temperature and intake air temperature within the specified range, start the engine.

2. Warm up the engine at idle until the radiator fan comes on.

3. Drive the vehicle at a speed between 45 — 75 mph (72 — 120 km/h) for at least 20 minutes.

4. After stopping the engine, turn the ignition switch off, and leave the vehicle for at least 32 minutes

(EONV executes).

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

Diagnosis Details

Conditions for illuminating the MIL

When a malfunction is detected during the first drive cycle with the ECT and IAT at engine start-up within
the specified temperature range, a Temporary DTC is stored in the PCM memory. If the malfunction recurs
during the next (second) drive cycle with the ECT and IAT at engine start-up within the specified
temperature range, 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 P0498 (117): ADVANCED DIAGNOSTICS

DTC P0498: EVAPORATIVE EMISSION (EVAP) CANISTER VENT SHUT VALVE CONTROL
CIRCUIT LOW VOLTAGE

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

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

Page 122 © 2005 Mitchell Repair Information Company, LLC.

Fig. 88: Evaporative Emission Canister Vent Shut Valve Control (Low Voltage) — Circuit Diagram

General Description

The evaporative emission (EVAP) canister vent shut valve is attached to the EVAP canister to control the
ventilation of the EVAP canister to atmosphere.

The EVAP canister vent shut valve is open (open to atmosphere) when the VSV signal is OFF.

If the return signal is «Low» when the powertrain control module (PCM) outputs the «ON» signal to the
EVAP canister vent shut valve, the PCM detects a malfunction and a DTC is stored.

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

MONITOR DESCRIPTION CHART

Enable Conditions

ENABLE CONDITIONS

Malfunction Threshold

The return signal is «Low» for at least 5 seconds when the PCM outputs the «ON» signal to the EVAP
canister vent shut valve.

Execution

Continuous

Sequence

None

Duration

5 seconds or more

DTC Type

One drive cycle, MIL ON

OBD Status

N/A

Condition

Minimum

Maximum

Battery voltage

10.1 V

State of the engine

Running

No active DTCs

P0499

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

me

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

Page 123 © 2005 Mitchell Repair Information Company, LLC.

Confirmation Procedure with the HDS

Do the EVAP CVS ON in the INSPECTION MENU with the HDS.

Diagnosis Details

Conditions for illuminating the MIL

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the
PCM memory.

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

DTC P0499 (117): ADVANCED DIAGNOSTICS

DTC P0499: EVAPORATIVE EMISSION (EVAP) CANISTER VENT SHUT VALVE CONTROL
CIRCUIT HIGH VOLTAGE

Fig. 89: Evaporative Emission Canister Vent Shut Valve Control (High Voltage) — Circuit Diagram

General Description

The evaporative emission (EVAP) canister vent shut valve is attached to the EVAP canister to control the
ventilation of the EVAP canister to atmosphere.

The EVAP canister vent shut valve is open (open to atmosphere) when the VSV signal is OFF.

If the return signal is «ON» when the powertrain control module (PCM) outputs the «Low» signal to the
EVAP canister vent shut valve, the PCM detects a malfunction and a DTC is stored.

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

me

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

Page 124 © 2005 Mitchell Repair Information Company, LLC.

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