Theft Deterrent System (W/O Intrusion Sensor) - Diagnosis System

Lexus IS250 IS220d GSE20 ALE20 - THEFT DETERRENT


THEFT DETERRENT SYSTEM (w/o Intrusion Sensor) - DIAGNOSIS SYSTEM

DESCRIPTION

The main body ECU RH controls the functions of the theft deterrent system on the vehicle. Wireless door lock control system data can be read in the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the intelligent tester to check for a malfunction and perform repairs.

DLC3 CHECK
Theft Deterrent System (W/O Intrusion Sensor) - Diagnosis System. THEFT DETERRENT. Lexus IS250 IS220d GSE20 ALE20

The vehicle's ECM uses the ISO 15765-4 for communication protocol. The terminal arrangement of the DLC3 complies with ISO 15031-03 and matches the ISO 15765-4 format.

SymbolTerminal No.NameReference terminalResultCondition
SIL7Bus "+" line5-Signal groundPulse generationDuring transmission
CG4Chassis groundBody ground1 Ω or lessAlways
SG5Signal groundBody ground1 Ω or lessAlways
BAT16Battery positiveBody ground9 to 14 VAlways
Theft Deterrent System (W/O Intrusion Sensor) - Diagnosis System. THEFT DETERRENT. Lexus IS250 IS220d GSE20 ALE20

Connect the cable of the intelligent tester to the DLC3, turn the engine switch on (IG) and attempt to use the intelligent tester. If the screen displays a communication error message, a problem exists in the vehicle side or with the tester side.

If communication is normal when the tool is connected to another vehicle, inspect the DLC3 on the original vehicle.
If communication is still impossible when the tool is connected to another vehicle, the problem is probably in the tool itself. Consult the Service Department listed in the tool's instruction manual.
CHECK BATTERY VOLTAGE

If voltage is below 11 V, replace the battery.

  • Voltage:
  • 11 to 14 V