Trouble Shooting

NOTE: Perform immobilizer system self-diagnostics before performing trouble shooting. See RETRIEVING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM.

TROUBLE SHOOTING SYMPTOMS

Problem

Inspect

Immobilizer Not Set (Engine Starts W/Incorrect Key Codes)

⁽¹⁾Power Source Circuit; ⁽²⁾ Transponder Key ECU

Engine Does Not Start

⁽³⁾ Key; ⁽²⁾ Wiring Harness; ⁽⁴⁾ Transponder Key Amplifier Circuit; ⁽²⁾ Transponder Key ECU

Security Indicator Is Always On

⁽⁵⁾ Security Indicator; ⁽²⁾ Wiring Harness; ⁽⁶⁾ Theft Deterrent ECU; ⁽²⁾ Transponder Key ECU

Security Indicator Is Always Off

⁽²⁾ Wiring Harness; ⁽⁶⁾ Theft Deterrent ECU; ⁽²⁾ Transponder Key ECU

⁽¹⁾	See POWER SOURCE CIRCUIT under SYSTEM TESTS.

⁽²⁾	Check for open or short circuits in wiring. See WIRING DIAGRAMS . Perform PIN VOLTAGE TESTS . Repair or replace components as necessary.

⁽³⁾	Ensure key used to start engine is registered. Also check if vehicle will start with other registered keys.

⁽⁴⁾	Check transponder key amplifier circuit. If wiring is okay, see WIRING DIAGRAMS .

⁽⁵⁾	Complete automatic registration mode. See NEW TRANSPONDER KEY CODE under PROGRAMMING.

⁽⁶⁾	See ANTI-THEFT SYSTEMS - LS430 article.