Test AO: Injector Control Pressure Too High
PINPOINT TEST AO: INJECTOR CONTROL PRESSURE TOO HIGHFlow Chart:
This pinpoint test is intended to diagnose the following:
- fuel system
- high pressure oil system
- ICP sensor
- IPR valve
Injection Control Pressure (ICP) Sensor Connector
Injection Control Pressure (ICP) Sensor Connector:
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AO1 : PRELIMINARY DIAGNOSIS FOR DTC P2284, P2288 OR P2290
- Carry out the KOEO, KOER, and continuous on-demand self-tests. Quick Test Description
- Retrieve and record all DTCs
- Record the freeze frame data
- Is DTC P2284, P2288 or P2290 present?
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AO2 : DIAGNOSTIC TROUBLE CODE (DTC) P2284 OR P2288
- Verify the correct oil quality/viscosity and correct fuel grade are being used for the temperature conditions.
- Is the oil and fuel quality OK?
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AO3 : CHECK THE FUEL PRESSURE
- Carry out the Fuel System Delivery test. Refer to Performance Diagnostic Procedures, Fuel System Delivery, to continue diagnosis. 10a. Fuel System Delivery
- Is the fuel pressure within specification?
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AO4 : CARRY OUT THE KOER ON-DEMAND SELF-TEST
- Carry out the KOER on-demand self-test Quick Test Description
- Is DTC P2284 or P2288 present?
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AO5 : CHECK THE ICP SENSOR
- Ignition ON, engine OFF.
- Access the PCM and monitor the ICP PID.
- Is the ICP PID voltage between 0.15 and 0.35 volt?
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AO6 : CHECK FOR OIL AERATION
- Accelerate the engine and hold at 3,300 RPM for 3 minutes.
- Access the PCM and monitor the ICP PID.
- Is the injection control pressure increase greater than 12.4 MPa (1,800 psi)?
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AO7 : CHECK THE IPR DUTY CYCLE UNDER VEHICLE LOAD
- Access the PCM and monitor the IPR PID.
- Operate the vehicle at WOT and a full load condition.
- Does the IPR duty cycle increase to 65%?
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AO8 : KOER ON-DEMAND DIAGNOSTIC TROUBLE CODE (DTC) P2284, P2288, OR P2290
- DTC P2288 indicates that injection control pressure was above the commanded desired pressure during selftest mode.
- DTC P2284 or P2290 indicate a difference in the command and actual injection control pressure.
- Verify the correct oil quality/viscosity and correct fuel grade are being used for the temperature conditions.
- Is the oil and fuel quality OK?
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AO9 : CHECK THE FUEL PRESSURE
- Carry out the Fuel System Delivery test. Refer to Performance Diagnostic Procedures, Fuel System Delivery, to continue diagnosis. 10a. Fuel System Delivery
- Is the fuel pressure within specification?
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AO10 : CHECK THE ICP SENSOR
- Ignition ON, engine OFF.
- Access the PCM and monitor the ICP PID.
- Is the ICP PID voltage between 0.15 and 0.35 volts?
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AO11 : CHECK FOR OIL AERATION
- Accelerate the engine to WOT and hold for 3 minutes.
- Is the injection control pressure increase greater than 12.4 MPa (1,800 psi)?
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AO12 : CHECK THE ICP SENSOR VOLTAGE WHILE CARRYING OUT THE SELF-TEST
NOTE: During the KOER on-demand self-test, the ICP is commanded high 17 MPa (2,465 psi), then low 5 MPa (725 psi), and then the EP is commanded high and low.
- Install the ICP/EBC adapter cable D94T-50-A, or equivalent, between the ICP sensor and the engine harness.
- Measure the voltage between:
- Does the voltage reading increase above 3 volts and then decrease to approximately 1 volt during the ICP portion of the KOER self-test?
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AO13 : CHECK FOR CORRECT PCM OPERATION
- Disconnect all the PCM connectors.
- Visually inspect for:
- pushed out pins
- corrosion
- Connect all the PCM connectors and make sure they seat correctly.
- Carry out the PCM self-test and verify the concern is still present.
- Is the concern still present?
