DTC P0C47 (1075)
DTC P0C47 (1075): ES Coolant Pump Control Circuit Open
General Description
The electric powertrain system has a liquid cooling system, which uses an electric water pump to circulate the coolant. The electric water pump speed is controlled according to the drive command from the battery condition monitor module A and the speed is returned to the battery condition monitor module A. The battery condition monitor module A monitors the speed and when there are the following two states for a set time, the battery condition monitor module A detects a malfunction and stores a DTC.
- State where the electric water pump speed is out of the operation speed range (speed deviation failure).
- State where the electric water pump power relay commands OFF and the speed is out of a specified range (power relay stuck-ON failure).
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 5.0 seconds or more |
| DTC Type | Two drive cycles, MIL off, POWER SYSTEM indicator on, 12 volt battery charging system indicator off |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| Battery condition monitor module A power-supply voltage | 10.7 V | - |
| ES electric water pump duty command | - | 39.9 % |
| Vehicle condition | Vehicle ON mode, or Plug-in charge on, or Plug-in quick charge on | |
Malfunction Threshold
The ES electric water pump is 430 RPM or more for at least 5 seconds.
Possible Cause
- ES electric water pump ESEWPCTL line open
- ES electric water pump relay ESEWPRLY line short to ground
- ES electric water pump relay stuck on
- ES electric water pump internal failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the battery condition monitor module A memory. If the malfunction returns in the next (second) drive cycle, the POWER SYSTEM indicator comes on and a Confirmed DTC and the freeze data are stored.
Conditions for clearing the DTC
The POWER SYSTEM indicator is cleared if the malfunction does not return in the next trip in which the diagnostic runs. The POWER SYSTEM indicator, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.