Trouble Shooting: Notes

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.
Inspect the multiplex communication system and confirm that there is no trouble by the basic inspection and DTC check. See PRE-CHECK under SELF-DIAGNOSTIC in MULTIPLEX COMMUNICATION SYSTEM article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.
Inspect the door lock control system to make sure that it is operating normally. See POWER DOOR LOCKS, TRUNK LID & FUEL DOOR RELEASE 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⁾

All Functions Of Wireless Door Lock Control System Do Not Operate

⁽²⁾⁽³⁾⁽⁴⁾⁽⁵⁾

Wireless Door Lock Operates, But Buzzer Does Not Sound (Buzzer Does Not Sound When Customize Function Prohibits)

⁽⁶⁾⁽³⁾⁽⁴⁾

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

⁽²⁾	Check the transmitter. See WIRELESS DOOR LOCK TRANSMITTER under COMPONENT TESTS.

⁽³⁾	Check the wireless door lock control receiver. See WIRELESS DOOR LOCK CONTROL RECEIVER CIRCUIT under CIRCUIT TESTS.

⁽⁴⁾	Check the wire harness. See WIRING DIAGRAMS .

⁽⁵⁾	Check the body ECU No. 1. See BODY CONTROL SYSTEMS article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.

⁽⁶⁾	Check the wireless door lock buzzer. See WIRELESS DOOR LOCK BUZZER under COMPONENT 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.