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Nissan-Datsun
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2012
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Xterra PRO-4X, Automatic Trans
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System - DTCS P0222 To P0603
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DTC P0550: PSP Sensor
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Component Inspection
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Power Steering Pressure Sensor
Power Steering Pressure Sensor
Reconnect all harness connectors disconnected.
Start engine and let it idle.
Check voltage between ECM terminal 12 and ground under the following conditions.
Condition
Voltage
Steering wheel: being turned
0.5 - 4.5V
Steering wheel: not being turned
0.4 - 0.8V
Fig 1: Checking Voltage Between ECM Terminal 12 And Ground
Courtesy of NISSAN NORTH AMERICA, INC.