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:

Meter Illumination is Always Dark
DESCRIPTION In this circuit, the meter CPU receives auto dimmer signals from the main body ECU (driver side junction block assembly) using the CAN communication system (CAN No. 1 Bus). When the meter CPU receives an auto dimmer signal, it dims the meter ...

Pressure Control Solenoid "C" Performance (Shift Solenoid Valve SL3) (P0796)
SYSTEM DESCRIPTION The TCM uses the vehicle speed signal and signals from the transmission speed sensors (NC, NT) to detect the actual gear (1st, 2nd, 3rd, 4th, 5th or 6th gear). Then the TCM compares the actual gear with the shift schedule in the TCM memo ...

Relay
On-vehicle Inspection ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT STARTER RELAY (a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition ...