Trouble Shooting: Notes

NOTE: Trouble shooting of the remote keyless entry system is based on the premise that the door lock control system is operating normally. Make sure the door lock control system is operating normally before proceeding. See POWER DOOR LOCKS & LIFTGATE article under DOOR LOCKS & ANTI-THEFT SYSTEMS in ACCESSORIES & EQUIPMENT.

Trouble shooting of a remote keyless entry 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.
If the whole remote keyless entry system does not operate, go to step 4. If some of the functions of the remote keyless entry system do not operate, go to step 6.
Perform pre-check. See PRE-CHECK .
Inspect the transmitter. See WIRELESS DOOR LOCK TRANSMITTER under COMPONENT TESTS.

Determine problem symptom. See PROBLEM SYMPTOM INDEX table.

PROBLEM SYMPTOM INDEX

Symptom

Suspected Area ⁽¹⁾

All Functions Of Remote Keyless Entry System Does Not Operate

⁽²⁾⁽³⁾⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾⁽⁸⁾

Only Door Unlock Operation Is Not Possible (Lock Operation Is Possible)

⁽⁵⁾⁽⁹⁾⁽⁸⁾

Only Door Lock Operation Is Not Possible (Unlock Operation Is Possible)

⁽⁶⁾⁽⁸⁾

Only Transmitter Misoperation Prevention Function Is Not Possible

⁽⁷⁾⁽⁸⁾

Wireless Door Lock Function Operates Even When Each Door Is Opened

⁽⁴⁾⁽⁸⁾

Wireless Door Lock Functions Incorrectly (Although One Door Is Unlocked, When The Transmitter Switch Is Pressed, All Doors Unlock)

⁽⁹⁾⁽⁸⁾

Wireless Door Lock Operates, But The Buzzer Does Not Sound

⁽¹⁰⁾⁽⁸⁾

Wireless Door Lock Operates, But The Taillight Does Not Respond

⁽¹¹⁾⁽⁸⁾

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

⁽²⁾	Check the ECU power source circuit. See ECU POWER SOURCE CIRCUIT under CIRCUIT TESTS.

⁽³⁾	Check the ignition switch circuit. See IGNITION SWITCH CIRCUIT under CIRCUIT TESTS.

⁽⁴⁾	Check the door courtesy switch circuit. See DOOR COURTESY SWITCH CIRCUIT under CIRCUIT TESTS.

⁽⁵⁾	Check the door key lock and unlock switch circuit (unlock side). See DOOR KEY LOCK & UNLOCK SWITCH CIRCUIT (UNLOCK SIDE) under CIRCUIT TESTS.

⁽⁶⁾	Check the door key lock and unlock switch circuit (lock side). See DOOR KEY LOCK & UNLOCK SWITCH CIRCUIT (LOCK SIDE) under CIRCUIT TESTS.

⁽⁷⁾	Check the key unlock warning switch circuit. See KEY UNLOCK WARNING SWITCH CIRCUIT under CIRCUIT TESTS.

⁽⁸⁾	Check the wireless door lock ECU located behind the lower No. 1 panel of the instrument panel.

⁽⁹⁾	Check the door unlock detection switch circuit. See DOOR UNLOCK DETECTION SWITCH CIRCUIT under CIRCUIT TESTS.

⁽¹⁰⁾	Check the wireless door lock buzzer circuit. See WIRELESS DOOR LOCK BUZZER CIRCUIT under CIRCUIT TESTS.

⁽¹¹⁾	Check the taillight relay circuit. See TAILLIGHT RELAY CIRCUIT under CIRCUIT TESTS.

Inspect the circuits. See CIRCUIT TESTS .
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.