Toyota Venza: PIG Power Supply Voltage Malfunction (C1552)

Toyota Venza Service Manual / Power Assist Systems / Power Steering System / PIG Power Supply Voltage Malfunction (C1552)

DESCRIPTION

When a problem occurs in the power steering system, the power source relay circuit is shut off to stop the power assist.

DTC No.	DTC Detection Condition	Trouble Area
C1552	PIG power source circuit malfunction inside ECU	PIG 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 (PIG POWER SUPPLY)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

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

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

EMPS

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
PIG Power Supply	Power source voltage to active motor/ Min.: 0 V Max.: 20.1531 V	11 to 14 V	The engine is running and power steering is operating.

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

PIG Power Supply

Power source voltage to active motor/

Min.: 0 V

Max.: 20.1531 V

11 to 14 V

The engine is running and power steering is operating.

OK:

Normal condition value is displayed the Techstream.

REPLACE POWER STEERING ECU

2.	CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - BATTERY AND BODY GROUND)

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

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
D19-1 (PIG) - Body ground	Always	11 to 14 V

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)

REPLACE POWER STEERING ECU

REPAIR OR REPLACE HARNESS OR CONNECTOR

Assist Map Number Mismatch (C1582)

DESCRIPTION When an incorrect ECM or brake actuator assembly (skid control ECU) is installed after the assist map has been recorded in the power steering ECU, then DTC C1582 is stored because the ...

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 ...

Other materials about Toyota Venza:

Registered Device cannot be Deleted
PROCEDURE 1. DELETE OPERATION (a) Check if a registered portable player can be deleted normally. OK: Registered portable player can be deleted normally. OK END NG PROCEED TO ...

Sleep Operation Failure of Occupant Classification ECU (B1796)
DESCRIPTION In sleep mode, the occupant classification ECU reads the condition of each sensor while the ignition switch is off. In this mode, if occupant classification ECU detects an internal malfunction, DTC B1796 is output. DTC No. ...

Open in Outside Luggage Compartment Electrical Key Antenna Circuit (B27A8)
DESCRIPTION The certification ECU (smart key ECU assembly) generates a request signal and sends it to the outside electrical key oscillator (for rear side). To detect the key near the driver door, the outside electrical key oscillator (for rear side) cr ...