Only Wireless Control Function is Inoperative: Procedure

NG → GO TO step   2 

OK → END 

1. Check that the transmitter's LED illuminates 3 times when the switch is pressed 3 times.

   OK

   Transmitter's LED illuminates 3 times when the switch is pressed 3 times.

NG → GO TO step   4 

OK: Go to next step 

1. Check standard LOCK/UNLOCK switch operation.
   NOTE:

   Standardized test procedure: press the transmitter switch for 1 second, directing the beam to the driver side door outside handle from a distance of 1 m (3.28 ft). The transmitter should be pointed directly at the handle, i.e. at a 90° angle to the vehicle body.

NG → GO TO step   5 

OK → REPLACE DOOR CONTROL RECEIVER 

1. After replacing the transmitter battery, check that the doors can be locked and unlocked by using the transmitter LOCK/UNLOCK switch.

   OK

   Doors can be locked and unlocked with transmitter.

NG → REPLACE DOOR CONTROL TRANSMITTER 

OK → END 

Fig 1: Identifying Certification ECU Assembly Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Reconnect the U28 ECU connector.
2. Measure the voltage of the wire harness side connector.

   Standard voltage

   Tester Connection	Specified Condition
   U28-29 (RCO) - Body ground	4.6 to 5.4 V

NG → REPLACE CERTIFICATION ECU ASSEMBLY 

OK: Go to next step 

Fig 2: Identifying Terminals Of U36 Receiver And U28 ECU Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the U36 receiver connector.
2. Disconnect the U28 ECU connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Specified Condition
   U28-39 (RSSI) - U36-5 (RSSI)	Below 1 Ω
   U28-38 (RDA) - U36-3 (DATA)	Below 1 Ω
   U28-39 (RSSI) - Body ground	10 KΩ or higher
   U28-38 (PDA) - Body ground	10 KΩ or higher
   U28-29 (RCO) - U36-2 (+5)	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

Fig 3: Identifying Door Control Receiver Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Reconnect the U36 receiver connector.
2. Measure the voltage between the terminal of the connector and body ground.

   Standard voltage

   Tester Connection	Condition	Specified Condition
   U36-3 (DATA) - Body ground	Engine switch off, all doors closed and transmitter switch not pressed	11 to 14 V pulse generation at regular intervals
   U36-3 (DATA) - Body ground	Engine switch off, all doors closed and transmitter switch pressed	Pulse generation

NG → REPLACE DOOR CONTROL RECEIVER 

OK → REPLACE CERTIFICATION ECU ASSEMBLY