Smart Key System (For Entry Function) 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 ELECTRICAL TRANSMITTER BATTERY (VOLTAGE)

CHECK WAVE ENVIRONMENT

INSPECT FUSE (ECU-B2)

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. Check that there are not electrical key transmitters in the vehicle.
   
2. Before performing the inspection, check that DTC B1242 (wireless door lock control) is not output (COROLLA_ZRE142 RM000002075035X.html).
   

1. When the master switch assembly's door control switch is operated, check that the doors unlock and lock according to switch operation (COROLLA_ZRE142 RM000001333049X.html).
   

   OK:

   Door locks operate normally.
   

1. When another registered electrical key transmitter is used, check that the entry functions operate normally.
   

   Result:

   Result	Proceed to
   Entry functions do not operate normally	A
   Entry functions operate normally	B

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

   Result:

   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 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.

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.
   

   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, bring the electrical key transmitter within the entry operating range to perform the measurement. For the entry operating range, refer to System Description (COROLLA_ZRE142 RM000000XUC09JX.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 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.

   Result:

   Result	Proceed to
   Operation check is normal	A
   Operation check fails	B

   HINT:

   If the inspection result indicates 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.

1. Remove the ECU-B2 fuse from the main body ECU (instrument panel junction block).
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   ECU-B2 fuse	Always	Below 1 Ω

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:

   Tester Connection	Condition	Specified Condition
   E36-1 (+B) - Body ground	Always	11 to 14 V

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E36-17 (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
   E36-39 (RSSI) - M14-5 (RSSI)	Always	Below 1 Ω
   E36-38 (RDA) - M14-3 (DATA)	Always	Below 1 Ω
   E36-29 (RC0) - M14-2 (+5)	Always	Below 1 Ω
   E36-39 (RSSI) - Body ground	Always	10 kΩ or higher
   E36-38 (RDA) - Body ground	Always	10 kΩ or higher
   E36-29 (RC0) - Body ground	Always	10 kΩ or higher

1. Replace the door control receiver (COROLLA_ZRE142 RM0000030UM01FX.html).
   

1. Check that the entry functions operate normally.
   

   OK:

   Entry functions operate normally.