P0550

P0550 POWER STEERING PRESSURE (PSP) SENSOR




COMPONENT DESCRIPTION
Power steering pressure (PSP) sensor is installed to the power steering high-pressure tube and detects a power steering load. This sensor is a potentiometer which transforms the power steering load into output voltage, and emits the voltage signal to the ECM. The ECM controls the ETC actuator and adjusts the throttle valve opening angle to increase the engine speed and adjusts the idle speed for the increased load.

Consult-II Reference Value Monitor Mode:

On Board Diagnosis Logic
Malfunction is detected when an excessively low or high voltage from the power steering pressure sensor is sent to ECM.

Possible Cause
- Harness or connectors
(Power steering pressure sensor circuit is open or shorted)
- Power steering pressure sensor

DTC Confirmation Procedure

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 10 seconds before conducting the next test.

With CONSULT-II
1. Turn ignition switch "ON".
2. Select "DATA MONITOR" mode with CONSULT-II.
3. Start engine and let it idle for at least 5 seconds.
4. If 1st trip DTC is detected, go to "Diagnostic Procedure".

With GST
Follow the procedure "WITH CONSULT-II" above.

EC-PS/SEN-01:

Wiring Diagram

Step 1:

Step 2 - 5:

Step 6 - 9:

Diagnostic Procedure

Component Inspection

POWER STEERING PRESSURE SENSOR
1. Reconnect all harness connectors disconnected.
2. Start engine and let it idle.







3. Check voltage between ECM terminal 118 and ground under the following conditions.