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Basic Function Test

  1. Lock and unlock any door 3 times, using inside door lock switches. Stand about 3 feet from outside driver's door handle. Point remote transmitter toward vehicle. Depress one button on remote transmitter for about one second. If doors do not lock and unlock, go to next step. If doors lock and unlock, system is okay.
  2. Replace remote transmitter battery and repeat step  1. If keyless entry operates, system is okay at this time. If keyless entry does not operate, go to next step.
  3. Insert and remove key from ignition switch. Within 5 seconds, insert key and turn ignition OFF, ON and OFF. Within next 30 seconds, turn ignition switch OFF, ON and OFF 9 times. System is now in DIAGNOSTIC mode. If taillights do not flash, go to next step. If taillights flash for 0.2 seconds, pause, then flash for 0.5 seconds, go to step  7.
  4. Review method and verify steps to enter DIAGNOSTIC mode were completed correctly. If method is not correct, repeat step  3. If method was completed correctly, check function of taillights. See EXTERIOR LIGHTS article. If taillight operation is okay, go to next step.
  5. Use DVOM to check voltage at wireless door control receiver terminal No. 5 (Red wire). If 10-14 volts exist, go to next step. If 10-14 volts does not exist, check for blown MPX-B (7.5-amp) fuse or open circuit in Red wire between MPX-B fuse and wireless door control receiver. See WIRING DIAGRAMS .
  6. Check continuity of White/Black wire between ground and wireless door control receiver terminal No. 1. If continuity exists, replace wireless door control receiver. See WIRELESS DOOR CONTROL RECEIVER  under REMOVAL & INSTALLATION. If continuity does not exist, repair faulty circuit as necessary.
  7. Verify remote transmitter operation by depressing each button and watching taillights flash. LOCK button should cause taillights to flash on for 0.2 seconds, off for 0.5 seconds and on for 0.2 seconds. UNLOCK button should cause taillights to flash on for 0.2 seconds, off for 0.2 seconds and on for 0.2 seconds. If LOCK/UNLOCK function operates correctly, go to next step. If remote transmitter is not recognizing a code or is out of synchronization, taillights will stay on when remote transmitter button is depressed. If taillights flash only while receiving data, go into ADD or REWRITE mode. See REMOTE TRANSMITTER  under PROGRAMMING. If taillights are still not flashing, go to step  9.
  8. Depress any button on remote transmitter and hold for 20 seconds while walking around vehicle. Depress button again. Verify range is a minimum of 3 feet from vehicle. If remote transmitter range is as specified, keyless door lock remote transmitter and receiver are okay at this time. If remote transmitter range is not as specified, check range with a second remote transmitter. If range of second remote transmitter is as specified, replace original remote transmitter. If range is still not as specified, replace wireless door control receiver. See WIRELESS DOOR CONTROL RECEIVER  under REMOVAL & INSTALLATION.
  9. Depress each button of existing or replacement remote transmitter registered for this vehicle. If vehicle does not respond to either remote transmitters, go to next step. If vehicle responds correctly to only one remote transmitter, replace faulty remote transmitter.
  10. Check continuity in Red/Black wire between terminal No. 9 of body control ECU 22-pin harness connector B7 and terminal No. 3 of wireless door control receiver. See Fig 1-Fig 2 . If continuity exists, go to next step. If continuity does not exist, repair Red/Black wire as necessary.
  11. Check continuity in Purple wire between terminal No. 10 at body control ECU 22-pin harness connector B7 and terminal No. 2 at wireless door control receiver. See Fig 1-Fig 2 . If continuity exists, go to next step. If continuity does not exist, repair Purple wire as necessary.
  12. Measure voltage between ground and terminal No. 9 (Red/Black wire) at body control ECU 22-pin harness connector B7 when activating remote transmitter. If 6-7 volts exists when any button is depressed on remote transmitter, go to next step. If 6-7 volts does not exist while button is depressed on remote transmitter, repair Purple wire between body control ECU and terminal No. 2 at wireless door control receiver. See WIRING DIAGRAMS .
  13. Check continuity between ground and terminal No. 1 (White/Black wire) at wireless door control receiver harness connector. If continuity exists, replace wireless door control receiver. See WIRELESS DOOR CONTROL RECEIVER  under REMOVAL & INSTALLATION. See Figure. If continuity does not exist, repair open in White/Black wire between wireless door control receiver and ground located at left rear quarter panel.
Fig 1: Identifying Body Control ECU Connectors & Terminals
G00024208Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Identifying Wireless Door Lock Control Receiver Terminals
G00024218Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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