DTC P314A-828: Inverter Coolant Pump Speed Signal [10/2014 - 10/2015]: Description

Refer to the description for DTC P0C73-776 (Refer to DESCRIPTION ).

The inverter water pump assembly sends the water pump speed (measured value) signal to the power management control ECU. If the inverter water pump speed (measured value) signal is not sent to the power management control ECU when the power switch is on (READY), this DTC is stored.

DTC No.	INF Code	DTC Detection Condition	Trouble Area
P314A	828	The water pump speed signal is not sent to the power management control ECU when the power switch is turned on (READY). (1 trip detection logic)	Wire harness or connector Power management control ECU Inverter water pump assembly INV W/PMP fuse INV W/PMP RLY fuse INV W/PMP relay

HINT:

A malfunction (open, short to +B or short to ground) in the speed signal line from the inverter water pump assembly to the power management control computer is detected.
A malfunction in the inverter water pump assembly power source circuit is detected.
A malfunction in the +B line or speed signal line to the inverter water pump assembly is detected.
A malfunction in the inverter water pump assembly power source circuit or power management control computer power source circuit is detected.

DTC No.	Data List Item
P314A-828	Inverter W/P Revolution W/P Run Control Duty*1 Ready Signal

*1: This Data List item is related to the inverter water pump assembly.

DTC No.	Active Test
P314A-828	Activate the Water Pump*2

*2: This Active Test item is related to the inverter water pump assembly.