General Information

Power Trunk Module
B1621 ECU Check Sum Error - General Information

Component Location





General Description

The motor of PTM (Power Trunk Lid Module) consists of Drive Motor, Trunk Latch Motor, and Power Striker Motor. Therefore, It is available to open trunk by mechanical power. Opening is controlled by Trunk Lid Outside Handle, Door Trim Pull Switch, or Remote Controller. Closing is controlled by Inner Switch or Door Trim Push Switch. Opening or closing the rid by mechanical power is performed by hinge's rotation which is controlled by rod (This rod is consists of Sector Gear linked to Drive Motor Gear).
The motor speed is monitored by Hall IC. This value is used to control the driving power. The power is up when the speed is slower than the specific value and the power is down when the speed is faster than the specific value. Besides, the trunk lid is controlled in the counter direction when there is long interval between signals from Hall IC. Because It is assumed that there is obstacle or interference.
PTM consists of Micro-processor, several chip-sets, and IC & SMT elements. Among these components, CPU which controls others and Micro-processor which memorizes information can be exposed to physical defects rarely.






DTC Description

This code is outputted when there is error of Check Sum Flash Memory, Check Sum RAM, or Check Sum EEPROM internal PTM.

DTC Detecting Condition