P3086

L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P3086-184: Short Circuit in DC / DC Converter EMPS

DTC P3086-184 - Short Circuit in DC / DC Converter EMPS

DESCRIPTION

The hybrid vehicle control ECU requests the power steering converter to operate or stop according to the usage state of the HV battery.

WIRING DIAGRAM

INSPECTION PROCEDURE
CAUTION:
- Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with 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.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR
CAUTION: Be sure to wear insulated gloves.
(a) Turn the power switch off.
(b) Remove the service plug grip. L110F Hybrid Vehicle Control System

(e) Measure the voltage according to the value(s) in the table below.
HINT: Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC (P0A0D-350) to be set.

Standard voltage :

NG -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - POWER STEERING CONVERTER)
OK -- REPLACE POWER STEERING CONVERTER
2. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - POWER STEERING CONVERTER)
(a) Turn the power switch off.
(b) Disconnect connector A75 from the hybrid vehicle control ECU.
(c) Turn the power switch on (IG).

(d) Measure the voltage according to the value(s) in the table below.
HINT: Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC (P0A0D-350) to be set.

Standard voltage :

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE CONTROL ECU