Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Echo 2000-2002 Approved techinfo.toyota.com ileaf 02toyrm 02toypdf 02rmsour 2002 02echorm di eg cip0550
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DI-1 11
DIAGNOSTICS - ENGINE
DI68R-07
DTC P0550 Power Steering Pressure Sensor Circuit
Malfunction
CIRCUIT DESCRIPTION
ECM controls the idle speed the most appropriate according to the signal from the power steering pressure
sensor.
DTC No. DTC Detecting Condition Trouble Area
Condition (a) or (b) continues with more than 0.5 secs.: S Open in power steering pressure sensor circuit
P0550 (a) PNP < 0.28 V S Power steering oil pressure sensor
(b) PNP > 4.9 V S ECM
WIRING DIAGRAM
P2
Power Steering Oil Pressure Sensor ECM
3 1
3 R-W R-W VC
VC EC1 E6
Y 2 Y 12
2
VOUT EC1 E6 PSP
1 9
1 BR BR
GND EC1 E6 E2
I05144
2002 ECHO (RM884U)
Author : Date : 281
DI-1 12
DIAGNOSTICS - ENGINE
INSPECTION PROCEDURE
1 Check power steering oil pressure sensor.
PREPARATION:
(a) Connect the 3 dry batteries of 1.5 V in series.
(b) Connect the wire harness as shown in the illustration.
CHECK:
Measure voltage between terminals Vout and GND.
(-)
OK:
180 k
Power steering fluid pressure Voltage (V)
(+)
0 kPa (0 kgf/cm2, 0 psi) Approx. 0.45
A09071
3,500 kPa (36 kgf/cm2, 512 psi) Approx. 2.25
7,000 kPa (71 kgf/cm2, 1,010 psi) Approx. 4.05
NG Replace power steering oil pressure sensor.
OK
2 Check for open in harness and connector between ECM and power steering oil
pressure sensor (See page IN-29 ).
NG Repair or replace harness or connector.
OK
Check and replace ECM(See page IN-29 ).
2002 ECHO (RM884U)
Author : Date : 282
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