DTC P2600-31: Motor/Generator Coolant Pump "A" Control Circuit No Signal [08/2023 - ]: Description
WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.
The hybrid vehicle control ECU detects the generator (MG1) and motor (MG2) temperature based on signals from the generator and motor temperature sensors and activates the OIL PMP relay and oil pump driver (oil pump with motor assembly).
The hybrid vehicle control ECU monitors NOPM signals from the oil pump driver and detects malfunctions.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|---|
| P2600-31 | Motor/Generator Coolant Pump "A" Control Circuit No Signal | When the OIL PMP relay is on, the NOPM pulse signal is not output. (2 trip detection logic) |
|
Does not come on | Master Warning: Comes on |
Hybrid Control | A | SAE Code: P2600 |
HINT:
The oil pump with motor assembly cannot be activated only with the OIL PMP relay on. It is activated after receiving the command signals (OPM1) from the hybrid vehicle control ECU.