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.

    Click here

  • 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

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

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)
OK

REPLACE POWER STEERING ECU ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
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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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