Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnosis Procedure
ECM supplies a voltage of 5 V to some of the sensors systematically divided into 2 groups, respectively. Accordingly, when a short circuit develops in a sensor power source, a malfunction may occur simultaneously in the sensors belonging to the same group as the short-circuited sensor.
Sensor power supply 1
- Crankshaft position sensor 1
- Intake camshaft position sensor (bank 1)
- Exhaust camshaft position sensor (bank 1)
- Throttle position sensor
- Mass air flow sensor
- Accelerator pedal position sensor 1
- Engine oil pressure sensor
- Battery current sensor
- Power steering pressure sensor
Sensor power supply 2
- Crankshaft position sensor 2
- Fuel rail pressure sensor
- Intake manifold runner control valve position sensor
- Intake camshaft position sensor (bank 2)
- Exhaust camshaft position sensor (bank 2)
- Accelerator pedal position sensor 2
- Refrigerant pressure sensor
Sensor power supply 3
- EVAP control system pressure sensor
- CHECK APP SENSOR 2 POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect accelerator pedal position (APP) sensor harness connector.
- Turn ignition switch ON.
- Check the voltage between APP sensor harness connector and ground.
+ - Voltage (Approx.) APP sensor Connector Terminal E20 1 Ground 5 V
Is the inspection result normal?
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INSPECTION END
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GO TO 2.
- CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between APP sensor harness connector and ECM harness connector.
APP sensor ECM Continuity Connector Terminal Connector Terminal E20 1 E16 194 Existed
Is the inspection result normal?
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GO TO 3.
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Repair open circuit.
- CHECK SENSOR POWER SUPPLY 2 CIRCUIT
- Disconnect following sensors harness connector.
- Check harness for short to power and short to ground, between the following terminals.
ECM Sensor Connector Terminal Name Connector Terminal F78 60 Intake camshaft position sensor (bank 2) F37 1 63 Crankshaft position sensor 2 F13 1 65 Exhaust camshaft position sensor (bank 2) F40 1 66 Fuel rail pressure sensor F97 1 F79 136 Intake manifold runner control valve position sensor F42 3 Refrigerant pressure sensor E48 3 E16 194 Accelerator pedal position sensor 2 E20 1 Is the inspection result normal?
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GO TO 4.
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Repair short to ground or short to power in harness or connectors.
- CHECK COMPONENTS
Check the following.
- Crankshaft position sensor 2 (Refer to Component Inspection.)Component Inspection ).
- Intake manifold runner control valve position sensor (Refer to Diagnosis Procedure.)Diagnosis Procedure ).
- Fuel rail pressure sensor (Refer to Component Inspection (Fuel Rail Pressure Sensor) ).
- Refrigerant pressure sensor (Refer to Diagnosis Procedure ).
- Intake camshaft position sensor (bank 2) (Refer to Component Inspection ).
- Exhaust camshaft position sensor (bank 2) (Refer to Component Inspection.)Component Inspection ).
- Accelerator pedal position sensor 2 (Refer to Component Inspection (Accelerator Pedal Position Sensor) ).
Is the inspection result normal?
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Perform Intermittent Incident .
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Replace malfunctioning component.
NO RELATED
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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.