Toyota CH-R Service Manual: PIG Power Supply Voltage (C1552,C1554)

Toyota CH-R Service Manual / Power Assist Systems / Power Steering System / PIG Power Supply Voltage (C1552,C1554)

DESCRIPTION

If a problem occurs in the system, the power source relay circuit and the motor relay circuit are shut off to stop power assist. The ECU must be replaced when there is a problem with the relays because the relays are built into the ECU.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Warning Indicate	Return-to-normal Condition	Note
C1552	PIG Power Supply Voltage	PIG power source circuit malfunction	EPS fuse PIG power source circuit Power steering ECU assembly	EPS warning light: Comes on	Ignition switch ON again	-
C1554	Power Supply Relay Failure	Power source relay circuit malfunction	EPS fuse PIG power source circuit Power steering ECU assembly	EPS warning light: Comes on	Ignition switch ON again	-

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the power steering ECU assembly has been replaced, perform assist map writing and torque sensor zero point calibration.
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Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - BODY GROUND)

(a) Disconnect the F68 power steering ECU assembly connectors.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
F68-1 (PIG) - Body ground	Ignition switch ON	9 to 16 V

Standard Resistance:

Tester Connection	Condition	Specified Condition
F68-2 (PGND) - Body ground	Always	Below 1 Ω

*a	Front view of wire harness connector (to Power Steering ECU Assembly)

REPLACE POWER STEERING ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

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DESCRIPTION When an incorrect ECM, main body ECU (multiplex network body ECU) or skid control ECU (brake actuator assembly) is installed after the assist map has been written to the power steerin ...

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DESCRIPTION The torque sensor converts the rotational torque received from the steering wheel into electric signals and sends them to the power steering ECU assembly. DTC No. ...

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