Component Location
General Description

This wireless communication runs on RF (Radio frequency of 125 kHz). The antenna coil is mounted on the top of ignition lock for RF transmission and receiving. The RF signal from the transponder received by the antenna coil is converted into messages for serial communication by the SMARTRA device. And the received messages from the ECM are converted into an RF signal, which is transmitted, to the transponder by the antenna.

DTC Description

The ECM sets DTC P1691 if there's any fault in immobilizer antenna coil.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

•

-

1.

Open Circuit in antenna coil

2.

Short Circuit in antenna coil

3.

Faulty antenna coil

Enable Conditions

•

IG ON

Threshold value

•

Error in antenna coil signal

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.

Яндекс.Метрика