C1568

POWER STEERING: POWER STEERING SYSTEM: C1568: DC-DC Converter Malfunction
C1568 - DC-DC Converter Malfunction

DESCRIPTION

As a fail-safe function, when the power steering converter assembly is malfunctioning, power assistance stops.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK POWER STEERING ECU (PIG TERMINAL)

(a) Disconnect the A44 ECU connector.

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

Standard voltage:

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

OK -- REPLACE POWER STEERING ECU Removal
NG -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (CONVERTER - BATTERY AND ECU)

(a) Disconnect the A47 converter connector.

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

Standard voltage:

(d) Disconnect the A46 converter connector.

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

Standard resistance:

NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (CONVERTER - BATTERY)

(a) Disconnect the A46 converter connector.

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

Standard voltage:

NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

4. CHECK DTC

(a) Check for DTCs Power Steering System.

Result:

B -- GO TO DIAGNOSTIC TROUBLE CODE CHART Power Steering System

A -- REPLACE POWER STEERING CONVERTER ASSEMBLY Removal