Toyota Tundra. Manual — part 1584

WIRING DIAGRAM

Fig. 196: Power Steering Oil Pressure - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

MONITOR DESCRIPTION

The ECM monitors the sensor voltage and uses this value to regulate the engine idling speed When the sensor
output voltage deviates from the normal operating range, the ECM determines that there is a malfunction in the
power steering oil pressure sensor and stores a DTC

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

trip detection logic)

sensor



ECM

Related DTCs

P0550: Power steering pressure sensor range check (Chattering)
P0552: Power steering pressure sensor range check (Low
Resistance)
P0553: Power steering pressure sensor range check (High
Resistance)

Required sensors/components
(Main)

Power steering pressure sensor

Frequency of operation

Continuous

Duration

0 5 seconds

MIL operation

Immediate

Sequence of operation

None

Monitor runs whenever following DTCs not present

None

Time after starter signal ON to OFF

2 seconds or more

2009 Toyota Tundra

2009 ENG NE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

P0550:

TYPICAL MALFUNCTION THRESHOLDS CONDITIONS - P0550

P0552:

TYPICAL MALFUNCTION THRESHOLDS CONDITIONS - P0552

P0553:

TYPICAL MALFUNCTION THRESHOLDS CONDITIONS - P0553

INSPECTION PROCEDURE

HINT:



If other DTCs relating to different systems that have terminal E2 as the ground terminal are output
simultaneously, terminal E2 may have an open circuit



Read freeze frame data using the Techstream Freeze frame data records the engine condition when
malfunctions are detected When troubleshooting, freeze frame data can help determine if the vehicle was
moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other
data from the time the malfunction occurred

1

CHECK HARNESS AND CONNECTOR (ECM - POWER STEERING OIL PRESSURE
SENSOR)

a

Disconnect the D74 ECM connector

Fig. 197: Identifying D74 ECM And D46 Power Steering Oil Pressure Sensor Connector
Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

Disconnect the D46 power steering oil pressure sensor connector

c

Measure the resistance according to the value (s) in the table below

Power steering pressure sensor voltage

Less than 0 28 V, or more than 4 9 V

Power steering pressure sensor voltage

Less than 0 28 V

Power steering pressure sensor voltage

More than 4 9 V

2009 Toyota Tundra

2009 ENG NE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

2

REPLACE POWER STEERING OIL PRESSURE SENSOR

a

Replace the power steering oil pressure sensor

3

CONFIRM WHETHER DTC OUTPUT RECURS

a

Connect the Techstream to the DLC3

b

Turn the ignition switch to ON and turn the Techstream ON

c

Enter the following menus: Powertrain/Engine and ECT/Trouble Codes

d

Read the DTCs

Result

DTC OUTPUT RESULT

B: END

A: REPLACE ECM (See REMOVAL )

DTC P0560 SYSTEM VOLTAGE

DESCRIPTION

The battery supplies electricity to the ECM even when the ignition switch is in the OFF position This power
allows the ECM to store data such as DTC history, freeze frame data and fuel trim values If the battery voltage
falls below a minimum level, the memory is cleared and the ECM determines that there is a malfunction in the
power supply circuit When the engine is next started, the ECM illuminates the MIL and stores the DTC

DTC DETECTION CONDITION AND TROUBLE AREA REFERENCE CHART

Tester Connection

Condition Specified Condition

D46-2 (PSP) - D74-72 (PSP)

Always

Below 1 ohms

D46-1 (VC) - D74-67 (VCV1)

Always

Below 1 ohms

D46-3 (E2) - D74-97 (ETHW)

Always

Below 1 ohms

D46-2 (PSP) or D74-72 (PSP) - Body ground

Always

10 kohms or higher

D46-1 (VC) or D74-67 (VCV1) - Body ground Always

10 kohms or higher

Result

Proceed to

P0550, P0552 and/or P0553 are output

A

No DTC is output

B

DTC

DTC Detection Condition

Trouble Area

2009 Toyota Tundra

2009 ENG NE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

HINT:

If DTC P0560 is stored, the ECM does not store other DTCs or the data stored in the ECM is partly erased

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

TYPICAL MALFUNCTION THRESHOLDS CONDITIONS

WIRING DIAGRAM

P0560

Open in ECM back up power
source circuit (1 trip detection
logic)



Open in back up power
source circuit



Battery



Battery terminals



EFI NO 1 fuse



ECM

Related DTCs

P0560: ECM system voltage

Required Sensors/Components (Main)

ECM

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

3 seconds

MIL Operation

Immediate (MIL illuminated after next engine start)

Sequence of Operation

None

Monitor runs whenever following DTCs not present

None

ECM power source

Less than 3 5 V

2009 Toyota Tundra

2009 ENG NE PERFORMANCE Engine Control System (3UR-FBE) - Tundra