7380160-7380156-7380178-7380182-7380152-7380168

Component Location

General Description

The PCM/ECM and the SMARTRA communicate by dedicated line. During this communication of PCM/ECM and SMARTRA, the K line of PCM/ECM cannot be used for communication. The PCM/ECM controls the communication either to SMARTRA or to other devices(e.g. scanner) on K line by switching of a multiplexer and specific communication procedures. The multiplexer is a part of PCM/ECM H/W.

DTC Description

The ECM sets DTC P1694 if Request from EMS is invalid.

DTC Detecting Condition

Item	Detecting Condition	Possible Cause
DTC Strategy	• -	1. Faulty PCM/ECM ※ Protocol layer violation 2. Invalid request 3. Check sum error
Enable Conditions	• IG ON
Threshold value	• Protocol layer violation • Invalid request • Check sum error
Detecting time	• -
FAIL SAFE	• -

Diagnostic Circuit Diagram

note

To view Flash content, you need to install the appropriate browser extension

note

To view Flash content, you need to install the appropriate browser extension

Signal Waveform & Data

Fig.1) A normal signal waveform of antenna and immobilizer communication when IG key( TP : Transponder) is OFF to ON.