All Door Entry Lock/Unlock Functions And Wireless Functions Do Not Operate
THEFT DETERRENT / KEYLESS ENTRY: SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function): All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate
- All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate
DESCRIPTION
When the entry functions and wireless door lock functions do not operate, a malfunction or wave interference may be occurring in either of the following: 1) signal communication line between the door control receiver and certification ECU (smart key ECU assembly) (line is used for entry and wireless functions); or 2) electrical key transmitter.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
* Check that there are no electrical key transmitters in the vehicle.
* Before performing the inspection, check that DTC B1242 (wireless door lock control) is not output B1242.
PROCEDURE
1. CHECK POWER DOOR LOCK OPERATION
(a) When the door control switch on the master switch assembly is operated, check that the locked doors unlock Operation Check.
OK:
Locked doors unlock.
NG -- GO TO POWER DOOR LOCK CONTROL SYSTEM Problem Symptoms Table
OK -- Continue to next step.
2. CHECK ELECTRICAL KEY TRANSMITTER
(a) When another registered electrical key transmitter is used, check that the wireless and entry functions operate normally Operation Check.
Result:
A -- CHECK WAVE ENVIRONMENT
B -- Continue to next step.
3. CHECK ELECTRICAL KEY TRANSMITTER (LED)
(a) Check that the transmitter's LED illuminates 3 times when the switch is pressed 3 times.
Result:
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 Removal
C -- Continue to next step.
4. INSPECT TRANSMITTER BATTERY (VOLTAGE)
(a) 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 System Description.
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.
(b) Carefully pull the lead wire out from the position shown in the illustration and install the previously removed transmitter battery.
(c) 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 Removal.
Standard Voltage:
NG -- REPLACE TRANSMITTER BATTERY Removal
OK -- REPLACE ELECTRICAL KEY TRANSMITTER
5. CHECK WAVE ENVIRONMENT
(a) 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 -- INSPECT FUSE (SECURITY)
OK -- AFFECTED BY WAVE INTERFERENCE
6. INSPECT FUSE (SECURITY)
(a) Remove the SECURITY fuse from the main body ECU LH (cowl side junction block LH).
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPLACE FUSE (SECURITY)
OK -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY AND GROUND)
(a) Disconnect the certification ECU (smart key ECU assembly) connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage:
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
8. CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - CERTIFICATION ECU)
(a) Disconnect the door control receiver connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
9. REPLACE DOOR CONTROL RECEIVER
(a) Replace the door control receiver Removal.
NEXT -- Continue to next step.
10. CHECK DOOR CONTROL RECEIVER (OPERATION)
(a) Check that the wireless and entry functions operate normally Operation Check.
OK:
Wireless and entry functions operate normally.
NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Removal
OK -- END (DOOR CONTROL RECEIVER IS DEFECTIVE)