Inspection Procedure

1. When the door control switch on the master switch assembly is operated, check that the locked doors unlock (See OPERATION CHECK ).

   OK: Locked doors unlock. 

NG: GO TO POWER DOOR LOCK CONTROL SYSTEM  (See PROBLEM SYMPTOMS TABLE )

OK: Go to next Step 

1. When another registered electrical key transmitter is used, check that the wireless and entry functions operate normally (See OPERATION CHECK  )

   Result 

   RESULT REFERENCE
   
   

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

A: Go to step  5

B: Go to next Step 

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

   Result 

   RESULT REFERENCE
   
   

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

   HINT

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

A: REPLACE ELECTRICAL KEY TRANSMITTER 

B: REPLACE TRANSMITTER BATTERY  (See REMOVAL )

C: Go to next Step 

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 (See SYSTEM DESCRIPTION  )
   NOTE: 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
   Fig 1: Identifying Electrical Key Transmitter

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 (See REMOVAL )

   Standard Voltage 

   VOLTAGE SPECIFICATION
   
   

   Item	Content
   Tester Connection	Battery positive (+) - Battery negative (-)
   Tool Setting	0 5V/DIV, 100ms/DIV
   Condition	Engine switch OFF, all doors closed and lock switch pushed
   Specified Condition	2.2 to 3 2 V (Refer to the WAVEFORM REFERENCE waveform)

Fig 2: Checking Transmitter Battery Voltage Waveform
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE TRANSMITTER BATTERY  (See REMOVAL )

OK: REPLACE ELECTRICAL KEY TRANSMITTER 

1. Bring the electrical key transmitter near the door control receiver, and perform a wireless and smart 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 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: Go to step 6 

OK: AFFECTED BY WAVE INTERFERENCE 

1. Remove the SECURITY fuse from the main body ECU LH (cowl side junction block LH)
2. Measure the resistance according to the value (s) in the table below

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   SECURITY fuse	Always	Below 1 Ω

NG: REPLACE FUSE (SECURITY) 

OK: Go to next Step 

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

   Standard Voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   P33-1 (+B1) - Body ground	Always	11 to 14 V

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   P33-17 (E) - Body ground	Always	Below 1 Ω

Fig 3: Identifying P33 Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next Step 

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

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   P33-29 (RCO) - P31-2 (+5)	Always	Below 1 Ω
   P33-38 (RDA) - P31-3 (DATA)	Always	Below 1 Ω
   P33-39 (RSSI) - P31-5 (RSSI)	Always	Below 1 Ω
   P31-6 (GND) - Body ground	Always	Below 1 Ω
   P33-29 (RCO) - Body ground	Always	10 kΩ or higher
   P33-38 (RDA) - Body ground	Always	10 kΩ or higher
   P33-39 (RSSI) - Body ground	Always	10 kΩ or higher

Fig 4: Identifying P33 Connector Terminal And P31 Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next Step 

1. Replace the door control receiver (See REMOVAL )

1. Check that the wireless and entry functions operate normally (See OPERATION CHECK  ).

   OK: Wireless and entry functions operate normally. 

NG: REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)  (See REMOVAL  )

OK: END (DOOR CONTROL RECEIVER IS DEFECTIVE)