Test Q: Injection Control Pressure (ICP) Sensor
PINPOINT TEST Q: INJECTION CONTROL PRESSURE (ICP) SENSORFlow Chart:
This pinpoint test is intended to diagnose the following:
- ICP circuit open in the harness
- ICP circuit short to ground in the harness
- ICP circuit short to voltage in the harness
- ICP sensor
- powertrain control module (PCM)
Injection Control Pressure (ICP) Sensor Connector
Injection Control Pressure (ICP) Sensor Connector:
PCM Connector
PCM Connector:
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Q1 : PRELIMINARY DIAGNOSIS
- Carry out a visual inspection.
- Retrieve and record all DTCs
- Record the freeze frame data
- Clear the DTCs.
- Carry out the KOEO self-test. Quick Test Description
- Are any DTCs retrieved?
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Q2 : DIAGNOSTIC TROUBLE CODE (DTC) P2285
NOTE: DTC P2285 indicates the injector control signal circuit out of range low was detected during the KOEO self-test or during continuous diagnostic monitoring
- Ignition OFF.
- ICP Sensor connector disconnected.
- Ignition ON, engine OFF.
- Measure the voltage between:
- Is the voltage between 4.5 V - 5.5 V?
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Q3 : CHECK THE ICP SIGNAL CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- PCM connector disconnected.
- Measure the resistance between:
- Is the resistance greater than 10 kOhm?
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Q4 : CHECK THE ICP SIGNAL CIRCUIT FOR AN OPEN
- Measure the resistance between:
- Is the resistance less than 5 Ohm?
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Q5 : CHECK THE ICP SENSOR
NOTE: This step may cause DTC P2286 to set
- PCM connector connected.
- Ignition ON, engine OFF.
- Connect a 5 amp fused jumper wire between the following:
- Access the PCM and monitor the ICP PID.
- Is the voltage between 4 V - 5.5 V?
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Q6 : DIAGNOSTIC TROUBLE CODE (DTC) P2286
- Ignition OFF.
- ICP Sensor connector disconnected.
- The ICP sensor is disconnected to simulate the opposite DTC.
- Ignition ON, engine OFF.
- Carry out the KOEO self-test. Quick Test Description
- Is DTC P2285 present?
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Q7 : CHECK THE ICP SENSOR SIGNAL FOR A SHORT TO VOLTAGE
- Ignition OFF.
- PCM connector disconnected.
- Ignition ON, engine OFF.
- Measure the voltage between:
- Is any voltage indicated?
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Q8 : CHECK THE ICP SIGRTN CIRCUIT FOR AN OPEN
- Ignition OFF.
- Measure the resistance between:
- Is the resistance less than 5 Ohm?
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Q9 : CHECK THE VREF CIRCUIT FOR AN OPEN
- Ignition OFF.
- PCM connector disconnected.
- Measure the resistance between:
- Is the resistance less than 5 Ohm?
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Q10 : CHECK THE VREF CIRCUIT FOR A SHORT TO GROUND
- Measure the resistance between:
- Is the resistance greater than 10 kOhm?
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Q11 : CHECK THE ICP SENSOR FOR BIAS
NOTE: Verify the engine oil temperature (EOT) is greater than 82°C (180°F)
- Ignition ON, engine OFF.
- Access the PCM and monitor the ICP PID.
- Is the voltage between 0.15 V - 0.35 V?
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Q12 : 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?
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Q13 : ICP SENSOR INTERMITTENT CHECK
- Visually inspect the ICP sensor harness and connector for damage, corrosion, or incorrect routing.
- Access the PCM and monitor the ICP PID.
- While monitoring the ICP_V PID, wiggle, shake, and bend small sections of the wiring harness while working from the sensor to the PCM.
- Is there any change in the ICP PID value, or is a concern present?
