System Tests: Notes

WARNING: This page is about a different car, the 2003 Lexus ES 300 and 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.

ANTI-THEFT SYMPTOM INDEX

Symptom

Suspected Area

Anti-Theft System Cannot Be Set

⁽¹⁾ Indicator Light Circuit, ⁽²⁾ ECU Power Source Circuit, ⁽³⁾ Key Unlock Warning Switch Circuit, ⁽⁴⁾ Luggage Compartment Door Key Lock & Unlock Switch Circuit & Engine Hood Courtesy Switch Circuit

Indicator Light Does Not Blink When System Is Set

⁽¹⁾ Indicator Light Circuit

When System Is Set (System Does Not Operate When Engine Hood Is Opened)

Engine Hood Courtesy Switch Circuit

When System Is Set (It Is Not Canceled When Ignition Key Is Turned To ACC Or ON Position)

Ignition Switch Circuit

When System Is Set (It Is Still Operating When Luggage Compartment Door Is Opened With Key)

⁽⁴⁾ Luggage Compartment Door Key Lock & Unlock Switch Circuit

While System Is In Warning Operation (Horns Do Not Sound)

⁽⁵⁾ Horn Circuit

Even When System Is Not Set (Horns Sound)

⁽⁵⁾ Horn Circuit

⁽¹⁾	See INDICATOR LIGHT CIRCUIT under SYSTEM TESTS.

⁽²⁾	See ECU POWER SOURCE CIRCUIT under SYSTEM.

⁽³⁾	See UNLOCK WARNING SWITCH CIRCUIT (KEY UNLOCK WARNING SYSTEM) in POWER DOOR LOCKS, TRUNK LID & FUEL DOOR RELEASE - ES 300 article under DOOR LOCKS & ANTI-THEFT SYSTEMS in ACCESSORIES & EQUIPMENT.

⁽⁴⁾	See LUGGAGE COMPARTMENT DOOR LOCK CIRCUIT in POWER DOOR LOCKS, TRUNK LID & FUEL DOOR RELEASE - ES 300 article under DOOR LOCKS & ANTI-THEFT SYSTEMS in ACCESSORIES & EQUIPMENT.

⁽⁵⁾	See ANTI-THEFT HORN CIRCUIT under SYSTEM TESTS.