Up to 08/2009

POWER ASSIST SYSTEMS: 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 is limited/stopped.

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (POWER STEERING CONVERTER - BATTERY)

(a) Disconnect the g8 power steering converter assembly connector.

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

Standard Voltage:

Text in Illustration

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

2. CHECK HARNESS AND CONNECTOR (POWER STEERING CONVERTER - BATTERY)

(a) Disconnect the F101 power steering converter assembly connector.

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

Standard Voltage:

Text in Illustration

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

3. CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - POWER STEERING CONVERTER AND BODY GROUND)

(a) Disconnect the F10 power steering ECU connector.

(b) Disconnect the F100 power steering converter assembly connector.

Text in Illustration

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

4. CHECK POWER STEERING SYSTEM (OPERATION)

(a) Turn the power switch on (READY) and check whether the power assistance operates.

Result

B -- GO TO ACTIVE STABILIZER SUSPENSION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

A -- REPLACE POWER STEERING CONVERTER ASSEMBLY Removal