P3110 / INF223

DTC P3110-139 IGCT Relay Malfunction
DTC P3110-223 IGCT Relay Malfunction

DESCRIPTION

DTC Detection Condition:

The hybrid vehicle control ECU monitors the IGCT relay and detects malfunctions.

Wiring Diagram:

Step 1-2:

Step 2(Continued):

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, check the voltage at 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.
- If the battery voltage is applied to terminal +B, +B2, or MREL of the hybrid vehicle control ECU, even though the power switch is off, the circuit is shorted to +B.