DTC Description

DTC DETECTION LOGIC

DTC		M.U.T.-III SE screen terms (Trouble diagnosis content)	DTC detection condition
P0088	00	HIGH FUEL PRES (Fuel rail/system pressure - too high)	Diagnosis condition	Engine running at idle
			Signal (terminal)	Fuel rail pressure signal
			Threshold	ECM detects that the difference between target fuel pressure and fuel rail pressure sensor signal is 2,700 kPa (27.54 kg/cm², 319.5 psi)
			Diagnosis delay time	5 seconds

POSSIBLE CAUSE

Harness or connectors (The high pressure fuel pump circuit is open or shorted.)
High pressure fuel pump

FAIL-SAFE

Engine operating condition in fail-safe mode

Fail safe mode

Vehicle behavior

Traveling control mode

Accelerator angle variation control

ECM controls the accelerator pedal depression speed to make it slower than actual speed. This causes a drop in accelerating performance and encourages the driver to repair malfunction.

note	ECM does not control the accelerator pedal releasing speed.

Device fix mode

This mode fixes the electric IVT motor and the EVT control solenoid valve in the reference position.
The intake manifold runner control valve motor is turned OFF (intake manifold runner control valve opens).
A control signals is not transmitted to EGR volume control valve and the EGR volume control is deactivated.

Combustion control mode

Stratified charge combustion control at starting

No stratified charge combustion at starting (cold start).

DTC Confirmation Procedure

1.CHECK DTC PRIORITY

If DTC P0088 is displayed with DTC P0090, first perform the trouble diagnosis for DTC P0090.

Is applicable DTC detected?

Perform diagnosis of applicable. Refer to DTC Description

2.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.
Before performing the following procedure, check that the fuel tank is 1/8 full of fuel.

3.DTC CONFIRMATION PROCEDURE-1

Check that the fuel tank is 1/8 full of fuel.
Warm up the engine to the normal operating temperature and keep the engine speed at idle for 15 seconds.
note Warm up the engine until “COOLANT TEMP/S” on “DATA MONITOR” of M.U.T.-III SE reaches at least 70°C (158°F).
Check 1st trip DTC.

Is 1st trip DTC detected?

Proceed to DTC Diagnosis Procedure

4.DTC CONFIRMATION PROCEDURE-2

Cool the engine until the engine coolant temperature reaches 60°C (140°F) or less.
Start the engine and let it idle at least 40 seconds.
Check 1st trip DTC.

Is 1st trip DTC detected?

Proceed to DTC Diagnosis Procedure

-1To check malfunction symptom before repair: Refer to Intermittent IncidentIntermittent Incident

-2Confirmation after repair: INSPECTION END