General Information

Power Distribution Module

B1991 Immobilizer TX Short Circuit To Ground - General Information

Component Location





General Description

All 13 units which consists of the Body Electrical Control System are linked by CAN* line.
They are IPM (Inter Panel Module), FAM (Front Area Module), PDM (Power Distribution Module), DDM (Drive Door Module), ADM (Assist Door Module), ECW (Electronic Control Wiper), CLU (Cluster), MFSW (Multi Function Switch), PSM (Power Seat Module), SCM (Steering Control Module), PTM (Power Trunk Lid Module), FBWS (Front Back Warning System), DATC (Dual Auto Temperature Control Module).
After insert the fob into the fob holder, press SSB button. Then, the communication state between the fob and the immobilizer is inputted to PDM.
* CAN (Controller Area Network): CAN is serial bus communication type which links not only communication system but also control units each other.
*2 LIN (Local Interconnect Network): LIN is serial communication type which is used in electrical control system. (This is less expensive.)






DTC Description

This code is outputted when the immobilizer data circuit is shorted to ground.
(In this case, it is not possible to get authorization although the fob is in the holder.)

DTC Detecting Condition





Diagnostic Circuit Diagram





Signal Waveform & Data




Fig.1) IMMO_CLOCK & IMMO_DATE signal waveform