Toyota 4Runner manuals

Toyota 4Runner: VFC Solenoid Circuit (C15F0)

DESCRIPTION

This circuit supplies electric power to the power steering solenoid valve.

The power steering ECU assembly controls the output current to the power steering solenoid valve in accordance with the steering angle signal, steering zero point memory, vehicle speed signal and engine speed signal, adjusting the amount of power steering assist.

DTC Code

DTC Detection Condition

Trouble area

C15F0

A short or open in the solenoid valve circuit.

  • Harness or connector
  • Vane pump assembly
  • Power steering ECU assembly

WIRING DIAGRAM


PROCEDURE

1.

READ VALUE USING TECHSTREAM (SOLENOID CURRENT)

(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 / PPS / Data List.

PPS

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Solenoid Current

Solenoid Current/

Min.: 0 mA

Max.: 1000 mA

200 to 950 mA

The engine is running and the steering wheel is being turned.

OK:

The normal condition value is displayed on the Techstream.


OK

REPLACE POWER STEERING ECU ASSEMBLY


NG

2.

CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - POWER STEERING SOLENOID VALVE)

(a) Disconnect the F41 power steering ECU assembly connector.

(b) Disconnect the B40 power steering solenoid valve connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F41-7 (SOF+) - B40-2

Always

Below 1 Ω

F41-8 (SOF-) - B40-1

F41-7 (SOF+) or B40-2 - Body ground

Always

10 kΩ or higher

F41-8 (SOF-) or B40-1 - Body ground


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

3.

INSPECT POWER STEERING SOLENOID VALVE ASSEMBLY


(a) Disconnect the B40 power steering solenoid valve connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 - 2

20°C (68°F)

6.7 to 7.3 Ω

(c) Connect the positive (+) lead of the battery with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector. Then check that the valve moves and makes an operating noise.

OK:

Valve moves and makes an operating noise.

Text in Illustration

*a

Component without harness connected

(Power Steering Solenoid Valve)


OK

REPLACE POWER STEERING ECU ASSEMBLY


NG

REPLACE VANE PUMP ASSEMBLY

Diagnostic Trouble Code Chart
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