Toyota Venza manuals

Toyota Venza: IG Power Supply Voltage Malfunction (C1551)

Toyota Venza Service Manual / Power Assist Systems / Power Steering System / IG Power Supply Voltage Malfunction (C1551)

DESCRIPTION

The power steering ECU distinguishes the ignition switch status as ON or off through the IG power source circuit.

DTC No.

DTC Detection Condition

Trouble Area

C1551

IG power source circuit malfunction inside ECU

  • ECU-IG No. 2 fuse
  • IG power source circuit
  • Power steering ECU

WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

  • If the power steering ECU has been replaced with a new one, perform the rotation angle sensor initialization and torque sensor zero point calibration (See page ).

  • Inspection the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.

READ VALUE USING TECHSTREAM (IG POWER SUPPLY)

(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 / EMPS / Data List.

(f) Select the items "IG Power Supply" in the Data List and read the value displayed on the Techstream.

EMPS

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

IG Power Supply

ECU power source voltage/

Min.: 0 V

Max.: 20.1531 V

11 to 14 V

Ignition switch ON

OK:

Normal condition value is displayed the Techstream.


OK

REPLACE POWER STEERING ECU


NG

2.

CHECK HARNESS AND CONNECTOR (BATTERY - POWER STEERING ECU)

(a) Disconnect the connectors from the power steering ECU.


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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

D20-6 (IG) - Body ground

Ignition switch ON

11 to 14 V

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D19-2 (PGND) - Body ground

Always

Below 1 Ω

Text in Illustration

*1

Front view of wire harness connector

(to Power Steering ECU)


OK

REPLACE POWER STEERING ECU


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Assist Map Number Un-Writing (C1581)
DESCRIPTION The power steering ECU stores this DTC when it determines that the assist map is not written in the ECU. HINT: The assist map is data written in the power steering ECU to control the ...

Motor Rotation Angle Sensor Malfunction (C1528)
DESCRIPTION The motor rotation angle sensor detects the motor rotation angle and sends this information to the power steering ECU. DTC No. DTC Detection Condition ...

Other materials about Toyota Venza:

Removal
REMOVAL CAUTION / NOTICE / HINT HINT: The front side fix window assembly can be reused. When installing the window, if any of the clips on the quarter window glass are broken, butyl tape can be used to support the glass until the applied adh ...

Checking and replacing fuses
If any of the electrical components do not operate, a fuse may have blown. If this happens, check and replace the fuses as necessary. Vehicles with smart key system: Turn the “ENGINE START STOP” switch off. Vehicles without smart key system: Turn th ...

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART NOTICE: Turn the ignition switch off before removing any parts. HINT: If no malfunction is found when inspecting parts, inspect the skid control ECU and ground points for poor connections. If a trouble code is ...

© 2016-2020 Copyright www.tovenza.com

0.1908