Connect the M-MDS to the DLC-2.
Switch the ignition ON (engine off).
Display the PCM PIDs [EVAP_PRES] and [FTP]. (See PID/DATA MONITOR INSPECTION .) (See PID/DATA MONITOR TABLE [PCM (VINs 7, L, M) (US))] .)
Lift up the vehicle with the M-MDS connected.
Remove the evaporative hose (atmosphere side) and evaporative hose (fuel tank side) connected to the charcoal canister.
Disconnect the quick release connector (fuel tank side) connected to the pressure control valve component.

Verify the PIDs [EVAP_PRES] and [FTP] value are as specified.

STANDARD VOLTAGE SPECIFICATION

EVAP_PRES

FTP

kPa {kgf/cm² , psi}⁽¹⁾

Approx. 2.6

Approx. 0 {0, 0}

⁽¹⁾	The fuel tank pressure displayed on the M-MDS indicates the difference between the pressure and the barometric pressure.

If the specified value can be verified, go to the next step.
If the specified value cannot be verified, replace the PCM. (See PCM REMOVAL/INSTALLATION .)

Verify that the output voltage of the fuel tank pressure sensor (PID: EVAP_PRES) changes when pressure is applied from the quick release connector (fuel tank side).

STANDARD VOLTAGE SPECIFICATION

If not as verified, replace the pressure control valve. (See PRESSURE CONTROL VALVE REMOVAL/INSTALLATION .)

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Function Inspection