All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate [03/2017 - 12/2017]: Procedure

1. Measure the voltage of the vehicle battery.

   Standard voltage

   11 to 14 V

   HINT: 

   It may be possible to tell whether the vehicle battery is discharged by operating the horn.

   If the voltage is below 11 V, recharge or replace the vehicle battery before proceeding.

Result: 

NEXT 

See step  2

1. Open the driver door using the mechanical key built into the electrical key transmitter sub-assembly.
2. Connect the Techstream and check for DTCs (Refer to DTC CHECK / CLEAR [03/2017 - ] ).

   OK

   DTC is not output.

Result: 

NG 

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [03/2017 - ] 

Result: 

OK 

See step  3

1. When the door control switch on the power window regulator master switch assembly on the driver door is operated, check that the doors unlock and lock according to the switch operation (Refer to OPERATION CHECK [03/2017 - ] ).

   OK

   Door locks operate normally.

Result: 

NG 

GO TO POWER DOOR LOCK CONTROL SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2016 - ] 

Result: 

OK 

See step  4

1. Check if there are any other registered electrical key transmitter sub-assemblies.
   RESULT
   
   

   Result	Proceed to
   There are no other registered electrical key transmitter sub-assemblies	A
   There is another registered electrical key transmitter sub-assemblies	B

Result: 

B 

See step  6

Result: 

A 

See step  5

1. Register a new electrical key transmitter sub-assembly (Refer to REGISTRATION [03/2017 - 12/2017] ).

Result: 

NEXT 

See step  6

1. Using another registered electrical key transmitter sub-assembly, check if an entry lock/unlock operation can be performed twice in succession (Refer to OPERATION CHECK [03/2017 - 12/2017] ).

   OK

   Entry lock/unlock operate normally.

Result: 

NG 

See step  9

Result: 

OK 

See step  7

1. Check the transmitter battery level of the electrical key transmitter sub-assembly that was checked first.
   1. Press and hold the lock switch of the transmitter for 5 seconds and check the number of times that the transmitter LED illuminates.
      RESULT
      
      

      Result	Proceed to
      Transmitter LED does not illuminate when switch is pressed and held	A
      Transmitter LED illuminates 3 times or more when switch is pressed and held	B
      Transmitter LED illuminates once or twice but not a third time	C

      HINT: 

      • The electrical key transmitter sub-assembly sends voltage information to the certification ECU (smart key ECU assembly) when it is being used. The certification ECU (smart key ECU assembly) displays "Yes" for the "Key Low Battery" item of the Data List when this voltage information indicates 2.4 V or less (Refer to DATA LIST / ACTIVE TEST [03/2017 - ] )
      • Even if the transmitter battery is depleted, it is still possible to start the engine by holding the electrical key transmitter sub-assembly against the engine switch, depressing the brake pedal and pressing the engine switch.

Result: 

B 

REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY 

Result: 

C 

REPLACE TRANSMITTER BATTERY. Refer to  REPLACEMENT [03/2017 - 12/2017] 

Result: 

A 

See step  8

1. Remove the transmitter battery from the electrical key transmitter sub-assembly that does not operate (Refer to REPLACEMENT [03/2017 - 12/2017] ).
2. Attach a lead wire (0.60 mm (0.0236 in.) in diameter or less including wire sheath) with tape or equivalent to the negative terminal.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   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 transmitter 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. Measure the voltage of the transmitter battery.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a

   GND

   HINT: 

   • When measuring the transmitter battery voltage, bring the electrical key transmitter sub-assembly within the lock entry operating range while operating the lock sensor of a door handle to perform the measurement.
   • Perform the measurement when the key is at room temperature.
   • The key sends voltage information to the certification ECU (smart key ECU assembly) when it is transmitting. When this voltage is 2.4 V or less the Data List item "Key Low Battery" displays "Yes". (Refer to DATA LIST / ACTIVE TEST [03/2017 - ] )

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   Transmitter battery positive (+) - Transmitter battery negative (-)	Engine switch off, all doors closed and lock sensor touched	2.5 to 3.2 V

Result: 

OK 

REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY 

Result: 

NG 

REPLACE TRANSMITTER BATTERY. Refer to  REPLACEMENT [03/2017 - 12/2017] 

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

   HINT: 

   • When the electrical key transmitter sub-assembly 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.
   • There may be wave interference if the vehicle is near broadcasting antennas, large video displays, wireless garage door opener systems, wireless security cameras, home security systems, etc. In this case, move the vehicle to a different location and check if there is any improvement.
   • If a tool for checking electric waves, such as a signal strength meter, is available, move around the area while observing both the LF band (used by the vehicle antenna to form the detection area) and RF band (used by the electrical key transmitter sub-assembly for transmission) to check for locations where there is wave interference.

   OK

   Wireless and entry functions operate normally.

Result: 

OK 

AFFECTED BY WAVE INTERFERENCE 

Result: 

NG 

See step  10

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Main Body / Data List.
5. According to the display on the Techstream, read the Data List.
   MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   ACC SW	Engine switch status / OFF or ON	OFF: Engine switch off ON: Engine switch on (ACC)	-
   IG SW	Engine switch status / OFF or ON	OFF: Engine switch off ON: Engine switch on (IG)	-

Result: 

NG 

TROUBLESHOOT MAIN BODY ECU. Refer to  TERMINALS OF ECU [03/2017 - ] 

Result: 

OK 

See step  11

1. Disconnect the D48 certification ECU (smart key ECU assembly) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D48-11 (GND) - Body ground	Always	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   D48-2 (+B) - Body ground	Always	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

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

4. Reconnect the D48 certification ECU (smart key ECU assembly) connector.

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  12

1. Disconnect the D40 certification ECU (smart key ECU assembly) connector.
2. Disconnect the H28 door control receiver connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   D40-5 (RCO) - H28-10 (+5)	Always	Below 1 Ω
   D40-17 (RDA) - H28-9 (DATA)	Always	Below 1 Ω
   D40-19 (RSSI) - H28-6 (RSSI)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   D40-5 (RCO) or H28-10 (+5) - Body ground	Always	10 kΩ or higher
   D40-17 (RDA) or H28-9 (DATA) - Body ground	Always	10 kΩ or higher
   D40-19 (RSSI) or H28-6 (RSSI) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  13

1. Reconnect the H28 door control receiver connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H28-12 (GND) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Door Control Receiver)

Result: 

NG 

REPLACE DOOR CONTROL RECEIVER. Refer to  REMOVAL [06/2016 - ] 

Result: 

OK 

See step  14

1. Reconnect the D40 certification ECU (smart key ECU assembly) connector.
2. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   H28-10 (+5) - H28-12 (GND)	Procedure: Engine switch off Electrical key transmitter sub-assembly switch not pressed	Below 1 V
   	Procedure: Engine switch off Electrical key transmitter sub-assembly switch pressed	4.5 to 5.5 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Door Control Receiver)

Result: 

NG 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [03/2017 - ] 

Result: 

OK 

See step  15

1. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   H28-6 (RSSI) - H28-12 (GND)	Procedure: All doors closed All doors locked Electrical key transmitter sub-assembly switch not pressed	11 to 14 V
   	Procedure: All doors closed All doors locked Electrical key transmitter sub-assembly switch pressed	Below 2 V
   H28-9 (DATA) - H28-12 (GND)	Procedure: All doors closed All doors locked Electrical key transmitter sub-assembly switch not pressed	11 to 14 V
   	All doors closed All doors locked Electrical key transmitter sub-assembly switch pressed	11 to 14 V → Below 2 V → 11 to 14 V pulse generation output at regular interval

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Door Control Receiver)

Result: 

NG 

REPLACE DOOR CONTROL RECEIVER. Refer to  REMOVAL [06/2016 - ] 

Result: 

OK 

See step  16

1. Replace the certification ECU (smart key ECU assembly) with a new one (Refer to REMOVAL [03/2017 - ] ).
   NOTE:

   When the certification ECU (smart key ECU assembly) is replaced, it is also necessary to replace all registered electrical key transmitter sub-assemblies.

Result: 

NEXT 

See step  17

1. Check that the wireless door lock functions operate normally (Refer to OPERATION CHECK [03/2017 - ] ).

   OK

   Wireless door lock functions operate normally.

Result: 

OK 

END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE) 

Result: 

NG 

REPLACE MAIN BODY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [06/2016 - ]