RM35X0E _55 Steering _078944 POWER ASSIST SYSTEMS _0382923 POWER STEERING SYSTEM(w/ Variable Flow Control Solenoid Valve) C

POWER ASSIST SYSTEMS  POWER STEERING SYSTEM(w/ Variable Flow Control Solenoid Valve)  C15F014  VFC Solenoid Circuit Circuit Short to Ground or Open  


DESCRIPTION

This circuit supplies electric power to the variable flow control solenoid valve (vane pump assembly).

The power steering ECU assembly controls the output current to the variable flow control solenoid valve (vane pump assembly) in accordance with the steering angle signal, steering sensor zero point memory, vehicle speed signal and engine speed signal, adjusting the amount of power steering assist.

DTC No. Detection Item DTC Detection Condition Trouble Area
C15F014 VFC Solenoid Circuit Circuit Short to Ground or Open A short or open in the solenoid valve circuit
·

Harness or connector

·

Vane pump assembly

·

Power steering ECU assembly



DTC Detection Conditions: C15F014
Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition - - -
Malfunction Status A short in the solenoid valve circuit ○ -
An open in the solenoid valve circuit - ○
Detection Time - -
Number of Trips 1 trip 1 trip

WIRING DIAGRAM

C411201E01
5.188,2.76 7.156,3.115 1.969,0.354 10 false Power Steering ECU Assembly 0.396,2.75 2.635,3.177 2.24,0.427 10 false Variable Flow Control Solenoid Valve (Vane Pump Assembly) 1.635,1.625 2.177,1.865 0.542,0.24 10 false SOF+ 5.333,1.531 5.875,1.771 0.542,0.24 10 false SOF+ 1.667,2 2.208,2.24 0.542,0.24 10 false SOF- 5.333,1.917 5.875,2.156 0.542,0.24 10 false SOF- 5.198,2.604 5.698,2.875 0.5,0.271 10 false N36 0.406,2.583 1,2.854 0.594,0.271 10 false E27 2.167,1.531 2.708,1.771 0.542,0.24 10 false 2 2.167,1.917 2.708,2.156 0.542,0.24 10 false 1 5.104,1.521 5.646,1.76 0.542,0.24 10 false 7 5.104,1.917 5.646,2.156 0.542,0.24 10 false 8

PROCEDURE

1.READ VALUE USING GTS (Solenoid Actual Current (PPS))
a.

Turn the ignition switch off.


b.

Connect the GTS to the DLC3.


c.

Turn the ignition switch to ON.


d.

Turn the GTS on.


e.

Enter the following menus: Chassis / PPS / Data List.

Chassis > PPS > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Solenoid Actual Current (PPS) 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 GTS.


Result:
Proceed to
OK
NG



OK

REPLACE POWER STEERING ECU ASSEMBLY

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING ECU>REMOVAL


NG

2.CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - VANE PUMP ASSEMBLY)
2.CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - VANE PUMP ASSEMBLY)
a.

Disconnect the N36 power steering ECU assembly connector.


b.

Disconnect the E27 variable flow control solenoid valve (vane pump assembly) connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
N36-7 (SOF+) - E27-2 (SOF+) Always Below 1 Ω
N36-8 (SOF-) - E27-1 (SOF-)
N36-7 (SOF+) - Body ground Always 10 kΩ or higher
N36-8 (SOF-) - Body ground



Result:
Proceed to
OK
NG



OK

3.INSPECT VANE PUMP ASSEMBLY

NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

3.INSPECT VANE PUMP ASSEMBLY
a.

Disconnect the E27 variable flow control solenoid valve (vane pump assembly) connector.


b.
C358280C01
0.844,2.917 1.542,3.313 true 2.448,2.958 1.875,3.333 true 0.823,0.802 1.521,1.198 true 2.448,0.833 1.875,1.208 true 1.292,4.417 1.552,4.625 0.26,0.208 10 false (+) 1.99,4.406 2.219,4.615 0.229,0.208 10 false (-) 0.208,0.698 0.823,0.927 0.615,0.229 10 false 2 (SOF+) 0.24,2.823 0.854,3.052 0.615,0.229 10 false 2 (SOF+) 2.5,0.708 3.063,0.938 0.563,0.229 10 false 1 (SOF-) 2.5,2.844 3.063,3.073 0.563,0.229 10 false 1 (SOF-) 0.146,0.063 0.344,0.271 0.198,0.208 10 false *a
*a Component without harness connected
(Variable Flow Control Solenoid Valve (Vane Pump Assembly))


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

Standard Resistance:
Tester Connection Condition Specified Condition
1 (SOF-) - 2 (SOF+) 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 (SOF+) and the negative (-) lead to terminal 1 (SOF-) of the solenoid valve connector. Then check that the valve moves and makes an operating noise.

OK:

Valve moves and makes an operating noise.



Result:
Proceed to
OK
NG



OK

REPLACE POWER STEERING ECU ASSEMBLY

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING ECU>REMOVAL


NG

REPLACE VANE PUMP ASSEMBLY

Click hereSteering>POWER ASSIST SYSTEMS>VANE PUMP (for 1GD-FTV(w/ Variable Flow Control Solenoid Valve))>REMOVAL