DTC P0615-81: Starter Relay Circuit - Invalid serial data received: Action
- Check engine control module for additional DTCs and refer to the relevant DTC index. Rectify these first
- Refer to the appropriate system wiring diagrams and check the power and ground connections to the module
- Using the Jaguar Land Rover approved diagnostic equipment, check and install latest relevant level of software to the engine control module
- Clear the DTCs and retest
- Check and install new engine control module as required