Toyota 4Runner manuals

Toyota 4Runner: Pressure Sensor Malfunction / Upside (C1812/12)

Toyota 4Runner Service Manual / Suspension / Suspension Control / Kinetic Dynamic Suspension System / Pressure Sensor Malfunction / Upside (C1812/12)

DESCRIPTION

In the KDSS hydraulic circuit, the fluid is contained under pressure. If the fluid temperature is 20°C (68°F), the pressure is approximately 3.0 MPa (30.6 kgf/cm2, 435 psi).

DTC Code

DTC Detection Condition

Trouble Area

C1812/12

One of the following conditions is met:

  • The sensor power source voltage (SBP1 terminal) is 4.3 V or less for 0.5 seconds with the ignition switch ON.
  • The sensor power source voltage (SBP1 terminal) is 5.5 V or higher for 0.5 seconds with the ignition switch ON.
  • The sensor output (SOP1 terminal) is 0.3 V or less for 1 second with the ignition switch ON.
  • The sensor output (SOP1 terminal) is 4.7 V or higher for a second with the ignition switch ON.
  • Harness or connector
  • Accumulator pressure sensor (Stabilizer control with accumulator housing assembly)
  • Stabilizer control ECU

WIRING DIAGRAM


PROCEDURE

1.

READ VALUE USING TECHSTREAM (OIL PRESSURE SENSOR)

NOTICE:

  • Perform the inspection on a level surface.
  • Perform the inspection with the vehicle empty.
  • Make sure that the wheels are on the ground and facing straight ahead.
  • Perform the inspection with the vehicle load completely on the suspension.

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Enter the following menus: Chassis / KDSS / Data List.

(f) Select the item below in the Data List, and read the value displayed on the Techstream.

KDSS

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Oil Pressure Sensor

Oil pressure sensor/

Min.: -784.79 MPa (-8002.66 kgf/cm2, -113794.55 psi)

Max.: 784.76 MPa (8002.35 kgf/cm2, 113790.20 psi)

2.6 MPa (26.5 kgf/cm2, 377 psi) to 3.0 MPa (30.6 kgf/cm2, 435 psi): When vehicle stopped and fluid temperature 20°C (68°F)

-

(g) Check the fluid pressure.

OK:

2.6 MPa (26.5 kgf/cm2, 377 psi) to 3.0 MPa (30.6 kgf/cm2, 435 psi)


NG

GO TO STEP 3


OK

2.

RECONFIRM DTC

(a) Clear the DTCs (See page ).


(b) Check for DTCs (See page ).


Result

Result

Proceed to

DTC is output

A

DTC is not output

B


A

REPLACE STABILIZER CONTROL ECU


B

USE SIMULATION METHOD TO CHECK

3.

INSPECT STABILIZER CONTROL ECU (SBP1 VOLTAGE)

(a) Connect the stabilizer control ECU connector.

(b) Disconnect the stabilizer control with accumulator housing connector.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

O23-3 (SBP1) - Body ground

Ignition switch ON

4.75 to 5.25 V

Text in Illustration

*a

Front view of wire harness connector

(to Stabilizer Control with Accumulator Housing Assembly)



NG

GO TO STEP 7


OK

4.

CHECK HARNESS AND CONNECTOR (STABILIZER CONTROL ECU - ACCUMULATOR PRESSURE SENSOR)

(a) Disconnect the stabilizer control ECU connector.

(b) Disconnect the stabilizer control with accumulator housing connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F70-17 (SOP1) - O23-2 (SOP1)

Always

Below 1 Ω

F70-17 (SOP1) - Body ground

Always

10 kΩ or higher

F70-6 (SGP1) - O23-1 (SGP1)

Always

Below 1 Ω

F70-6 (SGP1) - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

5.

INSPECT ACCUMULATOR PRESSURE SENSOR (OUTPUT VOLTAGE)

(a) Connect the stabilizer control ECU connector.

(b) Connect the stabilizer control with accumulator housing connector.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

F70-17 (SOP1) - Body ground

Ignition switch ON

0.4 to 4.6 V

Text in Illustration

*a

Component with harness connected

(Stabilizer Control ECU)



OK

REPLACE STABILIZER CONTROL ECU


NG

6.

READ VALUE USING TECHSTREAM (OIL PRESSURE SENSOR)

(a) Disconnect the stabilizer control with accumulator housing connector.

(b) Connect the stabilizer control ECU connector.

(c) Connect the Techstream to the DLC3.

(d) Turn the ignition switch to ON.

(e) Turn the Techstream on.

(f) Enter the following menus: Chassis / KDSS / Data List.

(g) Select the item below in the Data List, and read the value displayed on the Techstream.

KDSS

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Oil Pressure Sensor

Oil pressure sensor/

Min.: -784.79 MPa (-8002.66 kgf/cm2, -113794.55 psi)

Max.: 784.76 MPa (8002.35 kgf/cm2, 113790.20 psi)

2.6 MPa (26.5 kgf/cm2, 377 psi) to 3.0 MPa (30.6 kgf/cm2, 435 psi): When vehicle stopped and fluid temperature 20°C (68°F)

-

(h) Using a 1.5 V dry cell battery, connect the positive (+) lead to terminal 2 (SOP1) of the stabilizer control with accumulator housing connector and the negative (-) lead to terminal 1 (SGP1), and check that the Data List display changes.

OK:

Data List display changes.

Text in Illustration

*a

Front view of wire harness connector

(to Stabilizer Control with Accumulator Housing Assembly)



OK

REPLACE STABILIZER CONTROLWITH ACCUMULATORHOUSING ASSEMBLY


NG

REPLACE STABILIZER CONTROL ECU

7.

CHECK HARNESS AND CONNECTOR (STABILIZER CONTROL ECU - ACCUMULATOR PRESSURE SENSOR)

(a) Disconnect the stabilizer control ECU connector.

(b) Disconnect the stabilizer control with accumulator housing connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F70-15 (SBP1) - O23-3 (SBP1)

Always

Below 1 Ω

F70-15 (SBP1) - Body ground

Always

10 kΩ or higher


OK

REPLACE STABILIZER CONTROL ECU


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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