System Operation Check

Trouble shooting of an anti-theft system complaint begins with verification of the customer problem. If problem occurs, go to step 3. If problem does not occur, go to next step.
If problem does not occur, review conditions under which problem occurred for customer and try to duplicate those conditions. For example, if the problem occurs on rainy days or during high humidity conditions, sprinkle water onto vehicle and see if malfunction occurs. DO NOT sprinkle water directly into engine compartment or onto electronic components. Visually inspect for signs of mechanical and electrical damage. Inspect for blown fuses and damaged relays. Inspect for loose or corroded connections, damaged wiring harnesses and/or switches. Check for a broken or partially broken wire inside insulation, which could cause system malfunction but prove good in a continuity/voltage check with system disconnected. Ensure any aftermarket electronic equipment is properly installed. If fault is found, repair as necessary.
Inspect the diagnostic system of the multiplex communication system. See PRE-CHECK under SELF-DIAGNOSTIC under MULTIPLEX COMMUNICATION SYSTEM article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.

NOTE: Before trouble shooting the anti-theft system, first make certain that the door lock control system is operating normally. See POWER DOOR LOCKS & TRUNK LID article under DOOR LOCKS & ANTI-THEFT SYSTEMS in ACCESSORIES & EQUIPMENT.

Determine problem symptom. See PROBLEM SYMPTOM INDEX table.

PROBLEM SYMPTOM INDEX

Symptom

Suspected Area ⁽¹⁾

Anti-Theft System Cannot Be Set

⁽²⁾⁽³⁾⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽⁹⁾⁽¹⁰⁾⁽¹¹⁾⁽¹²⁾⁽¹³⁾⁽¹⁴⁾⁽¹⁵⁾⁽¹⁶⁾⁽¹⁷⁾

Indicator Light Does Not Blink When System Is Set

⁽³⁾

When System Is Set (System Does Not Operate When The Rear Door Is Unlocked)

⁽⁸⁾

When System Is Set (System Does Not Operate When The Luggage Compartment Door Is Opened By A Method Other Than The Key)

⁽¹³⁾

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

⁽¹⁰⁾

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

⁽¹⁸⁾

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

⁽¹¹⁾

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

⁽¹⁹⁾

While System Is In Warning Operation (Headlights Do Not Flash)

⁽²⁰⁾

While System Is In Warning Operation (Taillights Do Not Flash)

⁽²¹⁾

While System Is In Warning Operation (Hazard Lights Do Not Flash)

⁽²²⁾

While System Is In Warning Operation (Door Lock Is Not Locked)

⁽⁸⁾

System Is Still Set Even When A Rear Door Is Open

⁽¹⁵⁾

Even When System Is Not Set (Horns Sound)

⁽¹⁹⁾

Even When System Is Not Set (Headlights Stay On)

⁽²⁰⁾

Even When System Is Not Set (Taillights Stay On)

⁽²¹⁾

Even When System Is Not Set (Hazard Lights Do Not Flash)

⁽²²⁾

System Cannot Be Canceled When Ignition Switch Is Turned To ON With Key

⁽⁵⁾⁽²³⁾⁽²⁴⁾⁽¹⁶⁾⁽¹⁷⁾

System Cannot Be Canceled When Luggage Compartment Door Is Unlocked With Key

⁽¹²⁾⁽¹⁶⁾⁽¹⁷⁾

System Does Not Operate When Engine Hood Is Opened

⁽⁹⁾⁽¹⁶⁾⁽¹⁷⁾

System Does Not Operate When Ignition Switch Is Turned To ACC Without Using A Key Or Transmitter

⁽²³⁾⁽⁵⁾⁽²⁵⁾⁽¹⁶⁾⁽¹⁷⁾

Some Of System Does Not Operate (Headlights Do Not Light Up)

⁽²⁶⁾⁽¹⁶⁾⁽¹⁷⁾

Some Of System Does Not Operate (Taillights Do Not Light Up)

⁽²⁷⁾⁽¹⁶⁾⁽¹⁷⁾

Some Of System Does Not Operate (Self Power Siren Or Horn Does Not Sound)

⁽²⁸⁾⁽²⁹⁾⁽³⁰⁾⁽³¹⁾⁽¹⁶⁾⁽¹⁷⁾

While Warning Is Given, System Cannot Be Cancelled By Unlocking Door With Key Or Transmitter

⁽³²⁾⁽¹⁶⁾⁽¹⁷⁾

While Warning Is Given, System Cannot Be Canceled By Turning Ignition Switch To ACC Or ON With Key

⁽²³⁾⁽⁵⁾⁽²⁴⁾⁽³³⁾⁽¹⁶⁾⁽¹⁷⁾

System Operates For More Than 30 Seconds

⁽¹⁷⁾

⁽¹⁾	Perform test procedures in order listed under suspected area.

⁽²⁾	Check indicator light. See ANTI-THEFT INDICATOR LIGHT under COMPONENT TESTS.

⁽³⁾	Check indicator light circuit. See ANTI-THEFT INDICATOR LIGHT CIRCUIT under CIRCUIT TESTS.

⁽⁴⁾	Check ECU power source circuit. See ECU POWER SOURCE CIRCUIT under CIRCUIT TESTS.

⁽⁵⁾	Check key unlock warning switch. See KEY UNLOCK WARNING SWITCH under COMPONENT TESTS under STEERING COLUMN SWITCHES article in ACCESSORIES & EQUIPMENT.

⁽⁶⁾	Check key unlock warning switch circuit. See KEY UNLOCK WARNING SWITCH CIRCUIT under CIRCUIT TESTS.

⁽⁷⁾	Check door unlock detection switch. See DOOR UNLOCK DETECTION SWITCH under COMPONENT TESTS under POWER DOOR LOCKS & TRUNK LID article under DOOR LOCKS & ANTI-THEFT SYSTEMS in ACCESSORIES & EQUIPMENT.

⁽⁸⁾	Check door unlock detection switch circuit. See DOOR UNLOCK DETECTION SWITCH CIRCUIT under CIRCUIT TESTS under BODY CONTROL SYSTEM article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.

⁽⁹⁾	Check engine hood courtesy switch. See ENGINE HOOD COURTESY SWITCH under COMPONENT TESTS.

⁽¹⁰⁾	Check engine hood courtesy switch circuit. See ENGINE HOOD COURTESY SWITCH CIRCUIT under CIRCUIT TESTS.

⁽¹¹⁾	Check luggage compartment door key lock and unlock switch circuit. See LUGGAGE COMPARTMENT DOOR KEY LOCK & UNLOCK SWITCH CIRCUIT under CIRCUIT TESTS.

⁽¹²⁾	Check luggage compartment door courtesy switch. See DOOR COURTESY SWITCH (LUGGAGE COMPARTMENT) under COMPONENT TESTS under AUTOMATIC HEADLIGHTS & LIGHTING SYSTEMS article in ACCESSORIES & EQUIPMENT.

⁽¹³⁾	Check luggage compartment door courtesy switch circuit. See LUGGAGE COURTESY SWITCH CIRCUIT under CIRCUIT TESTS under MULTIPLEX COMMUNICATION SYSTEM article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.

⁽¹⁴⁾	Check door key lock and unlock switch circuit. See POWER WINDOW MASTER SWITCH CIRCUIT under CIRCUIT TESTS under BODY CONTROL SYSTEM article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.

⁽¹⁵⁾	Check door courtesy switch circuit. See POWER WINDOW MASTER SWITCH CIRCUIT under CIRCUIT TESTS under BODY CONTROL SYSTEM article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.

⁽¹⁶⁾	Check wiring harness.

⁽¹⁷⁾	Check theft deterrent ECU.

⁽¹⁸⁾	Check ignition switch circuit. See IGNITION SWITCH CIRCUIT under CIRCUIT TESTS.

⁽¹⁹⁾	Check horn relay circuit. See HORN RELAY CIRCUIT under CIRCUIT TESTS.

⁽²⁰⁾	Check headlight control relay circuit. See HEADLIGHT CONTROL RELAY CIRCUIT under CIRCUIT TESTS.

⁽²¹⁾	Check taillight control relay circuit. See TAILLIGHT CONTROL RELAY CIRCUIT under CIRCUIT TESTS.

⁽²²⁾	Check hazard switch circuit. See HAZARD SWITCH CIRCUIT under CIRCUIT TESTS under BODY CONTROL SYSTEM article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.

⁽²³⁾	Check ignition switch. See STEERING COLUMN SWITCHES article in ACCESSORIES & EQUIPMENT.

⁽²⁴⁾	Check RAD NO. 2 fuse located in driver side junction block.

⁽²⁵⁾	Check transmitter. See WIRELESS DOOR LOCK TRANSMITTER under COMPONENT TESTS under REMOTE KEYLESS ENTRY article under DOOR LOCKS & ANTI-THEFT SYSTEMS in ACCESSORIES & EQUIPMENT.

⁽²⁶⁾	Check headlight system. See AUTOMATIC HEADLIGHTS & LIGHTING SYSTEMS article under HEADLIGHTS in ACCESSORIES & EQUIPMENT.

⁽²⁷⁾	Check taillight system. See AUTOMATIC HEADLIGHTS & LIGHTING SYSTEMS article under HEADLIGHTS in ACCESSORIES & EQUIPMENT.

⁽²⁸⁾	Check HORN fuse located in engine room No. 1 relay block.

⁽²⁹⁾	Check self power siren. See ANTI-THEFT SIREN BATTERY under COMPONENT TESTS.

⁽³⁰⁾	Check horn. See HORN under COMPONENT TESTS under STEERING COLUMN SWITCHES article in ACCESSORIES & EQUIPMENT.

⁽³¹⁾	Check horn relay. See RELAYS under COMPONENT TESTS under STEERING COLUMN SWITCHES article in ACCESSORIES & EQUIPMENT.

⁽³²⁾	Check door key lock and unlock switch. See DOOR KEY LOCK & UNLOCK SWITCH under COMPONENT TESTS under POWER DOOR LOCKS & TRUNK LID article under DOOR LOCKS & ANTI-THEFT SYSTEMS in ACCESSORIES & EQUIPMENT.

⁽³³⁾	Check ECU-IG fuse located in driver side junction block.

After repairs have been completed, confirm that problem has been eliminated. Operate the system under same conditions recorded for original complaint. If problem is no longer present, repair has corrected problem. If problem is still present, further diagnosis and repair is required.