1. Overview

Standards

Nexteer Manufacturing Services adhere to the ISO-14229 standard for Automotive Diagnostic Services as well as ISO-15765 (Transport Layer) standard for sending data packets over a CAN-Bus.

Connection Details

Request ID (to ECU): 0x712
Response ID (from ECU): 0x710

Byte Ordering

All data is transfered in Motorola format (most significant byte first - also known as big-endian).

NvM Values

For EA4, an ignition cycle or ECU reset is required to commit any and all stored values from Volatile Memory (RAM) to Non-Volatile Memory (NvM). When an auto trim, clear trim, write trim, or similar service is used to modify any value stored in NvM a flag is set within the controller indicating that the value is to be written to NvM on the next shutdown. The power cycle can be provided by means of a cycling of physical ignition (EPS ENA) or by issuing an ECU reset (11 60) service. The reception of a positive response from the ECU reset service indicates completion of NvM writes at which time it is safe to remove battery.