DTC P2603-768 Coolant Pump Control Circuit High: Description

WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

This is the repair procedure for the "oil pump control circuit".

Refer to the description for DTC P2601-777 .

DTC DETECTION CONDITION - TROUBLE AREA CHART

DTC No.	INF No.	DTC Detection Condition	Trouble Area
P2603	768	Open or +B short in oil pump driver circuit When OPM2 signal is ON, OPST signal remains Hi	Wire harness or connector Oil pump w/ motor assembly HV control ECU