Up to 08/2009

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: C1562: DC / DC Converter PIG Power Supply Voltage
C1562 - DC / DC Converter PIG Power Supply Voltage

DESCRIPTION

If an HV battery power supply malfunction signal from the power steering converter assembly is input to the power steering ECU, this DTC is stored and the P/S warning light illuminates. At this time, as a fail-safe function, power assistance is limited/stopped.





WIRING DIAGRAM





INSPECTION PROCEDURE

CAUTION:
- Before disconnecting the high-voltage connector of the power steering converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
HINT
- Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
- When measuring insulation resistance using a megohmmeter, set the megohmmeter to 500 V.
PROCEDURE

1. CHECK FOR DTC (HYBRID CONTROL SYSTEM)

(a) Check for DTCs in the hybrid control system Hybrid Control System.

Result





B -- GO TO HYBRID CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Hybrid Control System
A -- Continue to next step.

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

CAUTION:
Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

(b) Disconnect the g7 power steering converter assembly connector.





(c) Disconnect the g6 HV battery junction block connector.

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

Standard Resistance:





Text in Illustration





(e) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

NOTICE:
Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE POWER STEERING CONVERTER ASSEMBLY Removal