All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate: Procedure

1. When the door control switch on the multiplex network master switch assembly is operated, check that the doors unlock and lock according to the switch operation. Refer to OPERATION CHECK .

   OK

   Door locks operate normally.

NG → See step   10 

OK: Go to next step 

1. When another registered electrical key transmitter is used, check that the wireless and entry functions operate normally. Refer to OPERATION CHECK .
   RESULT
   
   

   Result	Proceed to
   Entry function operates	A
   Entry function does not operate	B

B → See step   5 

A: Go to next step 

1. Check that the transmitter LED illuminates 3 times when a switch is pressed 3 times.
   RESULT
   
   

   Result	Proceed to
   Transmitter LED does not illuminate when switch is pressed 3 times	A
   Transmitter LED illuminates 3 times when switch is pressed 3 times	B
   Transmitter LED does not illuminate second or third time	C

   HINT: 

   If the transmitter LED does not illuminate the second or third time, replace the transmitter battery as it is depleted.

C → See step   11 

B → REPLACE ELECTRICAL KEY TRANSMITTER 

A: Go to next step 

1. Remove the battery from the electrical key transmitter that does not operate. Refer to REPLACEMENT .
   Fig 1: Identifying Lead Wire

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Attach a lead wire (0.6 mm (0.0236 in.) in diameter or less including wire sheath) with tape or equivalent to the negative terminal.
   TEXT IN ILLUSTRATION
   
   

   *1

   Lead Wire

   NOTE:

   Do not wrap the lead wire around a terminal, wedge it between terminals, or solder it. The terminal may be deformed or damaged, and the battery will not be able to be installed correctly.

3. Carefully pull the lead wire out from the position shown in the illustration and install the previously removed transmitter battery.
4. Using an oscilloscope, check the transmitter battery voltage waveform.
   Fig 2: Checking Transmitter Battery Voltage Waveform

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT: 

   When measuring the battery voltage, bring the electrical key transmitter within the entry operating range while operating the lock sensor of a door handle to perform the measurement. For the entry operating range, refer to System Description. Refer to SYSTEM DESCRIPTION .

   Standard Voltage

   Item	Content
   Tester Connection	Battery positive (+) - Battery negative (-)
   Tool Setting	0.5 V/DIV., 100 ms/DIV.
   Condition	Engine switch off, all doors closed and lock sensor touched
   Specified Condition	2.5 to 3.2 V (Refer to waveform)

   TEXT IN ILLUSTRATION
   
   

   *1	Measurement Position

NG → See step   11 

OK → REPLACE ELECTRICAL KEY TRANSMITTER 

1. Bring the electrical key transmitter near the door control receiver and perform a wireless and entry function operation check.

   HINT: 

   • When the electrical key transmitter is brought near the door control receiver, the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.
   • If the inspection result is that the problem only occurs in certain locations or at certain times of day, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.

   OK

   Wireless and entry functions operate normally.

NG → See step   6 

OK → AFFECTED BY WAVE INTERFERENCE 

1. Check that the combination meter display turns off when the engine switch is turned off.

   OK

   Combination meter turns off.

   HINT: 

   This confirms that systems other than the smart key system are correctly detecting the state of the power source.

NG → GO TO SMART KEY SYSTEM (FOR START FUNCTION) 

OK: Go to next step 

1. Disconnect the F79 ECU connector.
   Fig 3: Identifying F79 ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F79-17 (CUTB) - Body ground	Always	11 to 14 V
   F79-1 (+B) - Body ground	Always	11 to 14 V

3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F79-15 (E) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Certification ECU)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the O10 receiver connector.
2. Disconnect the F78 ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   O10-4 (+5) - F78-5 (RCO)	Always	Below 1 Ω
   O10-5 (DATA) - F78-15 (RDA)	Always	Below 1 Ω
   O10-2 (RSSI) - F78-16 (RSSI)	Always	Below 1 Ω
   F78-5 (RCO) - Body ground	Always	10 kΩ or higher
   F78-15 (RDA) - Body ground	Always	10 kΩ or higher
   F78-16 (RSSI) - Body ground	Always	10 kΩ or higher
   O10-1 (GND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Temporarily replace the door control receiver with a new or normally functioning one. Refer to REMOVAL .
2. Check that the wireless and entry functions operate normally.

   OK

   Wireless and entry functions operate normally.

NG → See step   12 

OK → END (DOOR CONTROL RECEIVER IS DEFECTIVE)