C1569

POWER STEERING: POWER STEERING SYSTEM: C1569: Battery Power Supply Voltage Malfunction
C1569 - Battery Power Supply Voltage Malfunction

DESCRIPTION

As a fail-safe function, when the battery power supply voltage is malfunctioning, power assistance is limited/stopped.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (EPS ECU)

(a) Remove the EPS ECU fuse from the engine room No. 2 relay block.

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

Standard resistance:





NG -- REPLACE FUSE
OK -- Continue to next step.

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

(a) Disconnect the A44 ECU connector.





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

Standard voltage:





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

Standard resistance:





NOTICE:
If replacing the power steering ECU, initialize the rotation angle sensor value and calibrate the torque sensor zero point Power Steering System.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE POWER STEERING ECU Removal