Entry And Start System All Door Entry Lock/Unlock Functions And Wireless Functions Do Not Operate

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK POWER DOOR LOCK OPERATION

CHECK ELECTRICAL KEY TRANSMITTER

CHECK ELECTRICAL KEY TRANSMITTER (LED)

INSPECT TRANSMITTER BATTERY (VOLTAGE)

CHECK WAVE ENVIRONMENT

INSPECT FUSE (EFI NO. 1)

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY AND GROUND)

CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - CERTIFICATION ECU)

REPLACE DOOR CONTROL RECEIVER

CHECK DOOR CONTROL RECEIVER (OPERATION)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. The entry and start system (for entry function) uses a multiplex communication system (LIN communication system) and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (CAMRY_ACV40 RM000000XU703SX.html). Troubleshoot the entry and start system (for entry function) after confirming that the communication system is functioning properly.
   
2. Check that there are no electrical key transmitters in the vehicle.
   
3. Before performing the inspection, check that DTC B1242 (wireless door lock control) is not output (CAMRY_ACV40 RM00000207501JX.html).
   

1. When the door control switch on the master switch assembly is operated, check that the locked doors unlock (CAMRY_ACV40 RM00000133302LX.html).
   

   OK:

   Locked doors unlock.
   

1. When another registered electrical key transmitter is used, check that the wireless and entry functions operate normally (CAMRY_ACV40 RM000002U9W010X.html).
   

   Result:

   Result	Proceed to
   Entry functions operate and electrical key transmitter does not operate	A
   Entry functions do not operate	B

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

   Result:

   Result	Proceed to
   Transmitter LED does not illuminate 3 times when switch is pressed 3 times	A
   Transmitter LED illuminates 3 times when switch is pressed 3 times	B
   Transmitter LED does not illuminate the 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.

1. Remove the battery from the electrical key transmitter that does not operate. Attach a lead wire (0.6 mm (0.0236 in.) or less in diameter including wire sheath) with tape or equivalent to the negative terminal (CAMRY_ACV40 RM000001P7R01SX.html).
   

   NOTICE:

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

2. Carefully pull the lead wire out from the position shown in the illustration and install the previously removed transmitter battery.
   

3. Using an oscilloscope, check the transmitter battery voltage waveform.
   

   HINT:

   When measuring the battery voltage, while operating the lock switch of a door outside handle assembly, bring the electrical key transmitter within the entry operating range to perform the measurement. For the entry operating range, refer to System Description (CAMRY_ACV40 RM000000XUC03FX.html).

   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 switch pushed
   Specified Condition	2.2 to 3.2 V (Refer to the waveform)

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

   HINT:

   1. 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.
      
   2. If the inspection result is that the problem only occurs in certain locations or 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.
   

1. Remove the EFI NO. 1 fuse from the No. 1 engine room relay block and fuse block.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   EFI NO. 1 fuse	Always	Below 1 Ω

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

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   E74-1 (+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
   E74-17 (E) - Body ground	Always	Below 1 Ω

1. Disconnect the door control receiver connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   O27-6 (GND) - Body ground	Always	Below 1 Ω
   E74-29 (RC0) - O27-2 (+5)	Always	Below 1 Ω
   E74-38 (RDA) - O27-3 (DATA)	Always	Below 1 Ω
   E74-39 (RSSI) - O27-5 (RSSI)	Always	Below 1 Ω
   E74-29 (RC0) - Body ground	Always	10 kΩ or higher
   E74-38 (RDA) - Body ground	Always	10 kΩ or higher
   E74-39 (RSSI) - Body ground	Always	10 kΩ or higher

1. Replace the door control receiver (CAMRY_ACV40 RM000003EGM008X.html).
   

1. Check that the wireless and entry functions operate normally (CAMRY_ACV40 RM000002U9W010X.html).
   

   OK:

   Wireless and entry functions operate normally.