P3143

DTC P3143 HV INTERLOCK SWITCH OPEN/SHORT

CIRCUIT DESCRIPTION

DTC Detection Condition:

A short pin for the interlock switch is provided on the service plug grip and the inverter cover. Therefore, the interlock signal line circuit opens when the service plug grip or the inverter cover is removed.

If the HV control ECU detects an open circuit in the interlock signal line while the vehicle is in motion (vehicle speed above 3 mph [5 km/h]), it stores the information (INF) code 351 in its memory and alerts the driver. While the vehicle is in motion, the HV control ECU will not shut down the high-voltage system even if an open circuit in the interlock system is detected.

Wiring Diagram:

Step 1:

Step 2 - 3:

Step 3 (Continued) - 4:

INSPECTION PROCEDURE

CAUTION:
- Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from reconnecting it while you are servicing the high-voltage system.
- After disconnecting the service plug grip, wait for at least 5 minutes before touching any of the high-voltage connectors or terminals.

HINT: At least 5 minutes is required to discharge the high-voltage condenser inside the inverter.