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DTC P0087:00 [PCM (SKYACTIV-G 2.0)]

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2016 – MX-5 – Engine

DTC P0087:00 [PCM (SKYACTIV-G 2.0)]

NOTE:

  • To determine the malfunctioning part, proceed with the diagnostics from “Function Inspection Using M-MDS”.

Details On DTCs

DESCRIPTION

Fuel pressure sensor circuit range/performance problem

DETECTION CONDITION

Determination conditions

  • The actual fuel pressure is lower than the target fuel pressure by 1.2 MPa {12 kgf/cm2, 174 psi} or more even though the fuel pressure feedback amount is maintained high.

Preconditions

  • Engine speed: 500 rpm or more*1

  • The following DTCs are not detected:

    • Fuel pressure sensor: P0089:00, P0192:00, P0193:00

    • High pressure fuel pump: P0091:00, P0092:00

  • *1: Value can be verified by displaying PIDs using M-MDS

Malfunction determination period

  • 5 s period

Drive cycle

  • 1

Self test type

  • CMDTC self test

Sensor used

  • Fuel pressure sensor

FAIL-SAFE FUNCTION

  • Limits intake air amount

  • Stops high pressure fuel pump control

VEHICLE STATUS WHEN DTCs ARE OUTPUT

  • Illuminates check engine light.

POSSIBLE CAUSE

  • Air suction in fuel line due to fuel is runout

  • High pressure fuel pump connector or terminals malfunction

  • Fuel pressure sensor connector or terminals malfunction

  • PCM connector or terminals malfunction

  • Fuel pressure sensor malfunction

  • Fuel delivery system malfunction (insufficient fuel pressure)

  • Fuel injector malfunction

  • High pressure fuel pump malfunction

    • Relief valve (built-into high pressure fuel pump) malfunction

  • PCM malfunction

System Wiring Diagram

  • Not applicable

Function Explanation (DTC Detection Outline)

  • The PCM calculates the target fuel pressure appropriate to the engine conditions relative to the actual fuel pressure based on the fuel pressure sensor signal and provides feedback to the high pressure fuel pump control. If the difference between the actual fuel pressure and the target fuel pressure relative to the feedback amount is large, the PCM determines a malfunction in the fuel pressure sensor and stores a DTC.

Repeatability Verification Procedure

  • Warm up the engine to allow the engine coolant temperature to reach 80 °C {176 °F} or more.

  • Start the engine and leave it idling for 1 min.

    NOTE:

    • The target calculated by the PCM is increased and the DTC determination conditions are met by repeating the Step 3 operation.

  • Shift to 1st gear and accelerate/decelerate the vehicle to 30—50 km/h {19—31 mph}.

    NOTE:

    • Match the engine coolant temperature in the recorded FREEZE FRAME DATA/snapshot data, the vehicle speed, and engine speed values to the best extent possible while driving the vehicle.

  • Try to reproduce the malfunction by driving the vehicle for 5 min based on the values in the FREEZE FRAME DATA/snapshot data.

PID Item/Simulation Item Used In Diagnosis

PID/DATA monitor item table

Item

Definition

Unit

Condition/Specification

FUEL_PRES

Fuel pressure input from fuel pressure sensor

KPa , mBar , psi, in H20

  • Displays fuel pressure

Fuel pressure sensor voltage

V

    Ignition switched ON (engine off)

  • Fuel pressure is approx. 3.6 MPa {37 kgf/cm2, 522 psi}: Approx. 1.01 V (ECT is 92 °C {198 °F})

    Idle (after warm up)

  • Fuel pressure is approx. 3.45 MPa {35.2 kgf/cm2, 500 psi}: Approx. 1 V (ECT is 92 °C {198 °F})

    Racing (Engine speed is 2,000 rpm)

  • Fuel pressure is approx. 3.21 MPa {32.7 kgf/cm2, 466 psi}: Approx. 0.96 V (ECT is 86 °C {187 °F})

    Racing (Engine speed is 4,000 rpm)

  • Fuel pressure is approx. 5.59 MPa {57.0 kgf/cm2, 811 psi}: Approx. 1.29 V (ECT is 84 °C {183 °F})

Function Inspection Using M-MDS

STEP

INSPECTION

RESULTS

ACTION

1

PURPOSE: VERIFY RELATED REPAIR INFORMATION AVAILABILITY

  • Verify related Service Bulletins and/or on-line repair information availability.

  • Is any related repair information available?

Yes

Perform repair or diagnosis according to the available repair information.

  • If the vehicle is not repaired, go to the next step.

No

Go to the next step.

2

PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA

  • Is the DTC P0087:00 on FREEZE FRAME DATA?

Yes

Go to the next step.

No

Go to the troubleshooting procedure for DTC on FREEZE FRAME DATA.

(See DTC TABLE [PCM (SKYACTIV-G 2.0)].)

3

PURPOSE: RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION

NOTE:

  • Recording can be facilitated using the screen capture function of the PC.

  • Record the FREEZE FRAME DATA/snapshot data on the repair order.

Go to the next step.

4

PURPOSE: VERIFICATION IF MALFUNCTION CAUSED BY LACK OF FUEL

Yes

Refill the fuel.

Go to the troubleshooting procedure to perform the procedure from Step 3.

No

Go to the next step.

5

PURPOSE: VERIFY RELATED PENDING CODE AND/OR DTC

Yes

Go to the applicable PENDING CODE or DTC inspection.

(See DTC TABLE [PCM (SKYACTIV-G 2.0)].)

Go to the next step.

No

Go to the next step.

6

PURPOSE: VERIFY CONNECTOR CONNECTIONS

Yes

Repair or replace the applicable wiring harness or connector parts.

Go to the troubleshooting procedure to perform the procedure from Step 3.

No

Go to the next step.

7

PURPOSE: VERIFY FUEL PRESSURE (LOW-SIDE) MALFUNCTION

NOTE:

  • Verify the fuel pressure on the low pressure side with the operation of the high pressure fuel pump turned off.

  • Bleed the remaining pressure in the fuel line using the following procedure.

    • Switch the ignition off.

    • Disconnect the high pressure fuel pump connector.

    • Disconnect the fuel pump relay.

    • Start the engine and wait until the engine stalls.

  • Switch the ignition off.

  • Install the fuel pump relay.

  • Switch the ignition ON (engine off).

  • Display PID FUEL_PRES and simulation item FP using the M-MDS.

    (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

  • Turn simulation item FP on.

  • Is the FUEL_PRES PID value 430 kPa {4.38 kgf/cm2, 62.4 psi} or more?

Yes

Go to the troubleshooting procedure to perform the procedure from Step 2.

No

Go to the troubleshooting procedure to perform the procedure from Step 1.

Troubleshooting Diagnostic Procedure

    Intention of troubleshooting procedure

  • Step 1

    • Inspect the fuel supply system (low pressure side).

  • Step 2

    • Perform a unit inspection of the fuel pressure sensor.

  • Step 3—4

    • Verify that the primary malfunction is resolved and there are no other malfunctions.

STEP

INSPECTION

RESULTS

ACTION

1

PURPOSE: VERIFY IF MALFUNCTION RELATED TO FUEL PIPE (LOW PRESSURE SIDE) AFFECTS DIAGNOSTIC RESULTS

Yes

Replace the fuel pump unit, then go to Step 3.

(See FUEL PUMP UNIT REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Inspect the fuel system pipes (low to high pressure sides) for fuel leakage and restriction.

  • If there is any malfunction:

    • Repair or replace the malfunctioning part according to the inspection results, then go to Step 3.

  • If there is no malfunction:

    • Go to the next step.

2

PURPOSE: DETERMINE INTEGRITY OF FUEL PRESSURE SENSOR

Yes

Replace the fuel distributor, then go to the next step.

(See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

3

PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION

Yes

Repeat the inspection from Step 1.

Go to the next step.

No

Go to the next step.

4

PURPOSE: VERIFY IF THERE IS ANY OTHER MALFUNCTION

  • Is any other DTC or pending code stored?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [PCM (SKYACTIV-G 2.0)].)

No

DTC troubleshooting completed.

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