Only Wireless Control Function Is Inoperative

DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart Key System): Only Wireless Control Function is Inoperative
- Only Wireless Control Function is Inoperative

DESCRIPTION

The door control receiver receives signals from the transmitter and sends these signals to the main body ECU. The main body ECU then controls all the doors by sending lock/unlock signals to each door.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* Inspect the fuses for circuits related to this system before performing the following inspection procedure.
* When replacing the door control receiver, refer to the registration procedures Registration.

PROCEDURE

1. CHECK POWER DOOR LOCK OPERATION

(a) Check the power door lock operation Operation Check.

OK:

Each door locks and unlocks normally.

NG -- Go to POWER DOOR LOCK CONTROL SYSTEM How To Proceed With Troubleshooting
OK -- Continue to next step.

2. CHECK KEY REMINDER WARNING OPERATION

(a) Check the key reminder buzzer operation Operation Check.

HINT
If the key reminder buzzer is functioning normally, it can be assumed that the unlock warning switch is also functioning normally.

OK:

Key reminder buzzer operates normally.

NG -- Go to KEY REMINDER WARNING SYSTEM How To Proceed With Troubleshooting
OK -- Continue to next step.

3. CHECK WIRELESS DOOR CONTROL TRANSMITTER

(a) Check whether the wireless door lock control functions operate normally with another registered transmitter.

OK:

Wireless door lock control functions operate normally.

NG -- CHECK FOR ELECTRICAL NOISE
OK -- Continue to next step.

4. CHECK TRANSMITTER BATTERY

(a) Remove the battery from the inoperative wireless door control transmitter Transmitter Battery (w/o Smart Key System).

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

Standard Voltage:





NG -- REPLACE TRANSMITTER BATTERY Transmitter Battery (w/o Smart Key System)

OK -- REPLACE DOOR CONTROL TRANSMITTER

5. CHECK FOR ELECTRICAL NOISE

(a) Move the transmitter in the vicinity of the door control receiver.

HINT
Refer to Parts Location for the location of the door control receiver Wireless Door Lock Control System (w/o Smart Key System).

(b) Press and hold either the lock or unlock transmitter switch for 1 second, and check that the doors are locked or unlocked accordingly.

OK:

Wireless door lock control functions operate normally.

HINT
* Check if electrical noise is the cause by moving the door control transmitter closer to the door control receiver. Moving closer will decrease the effects of electrical noise.
* If the operation check can be performed normally, there is a high probability that electrical noise or a decrease in output from the door control transmitter is the cause of the malfunction. There is a high probability that electrical noise is the cause if the problem occurs only in a certain location or only during a certain time of day. Also, custom components may be causing electrical noise. If custom components are installed in the vehicle, remove them and perform the operation check again.

NG -- CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - MAIN BODY ECU)

OK -- FIND CAUSE OF ELECTRICAL NOISE AND REMOVE IT

6. CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - MAIN BODY ECU)

(a) Disconnect the O11 receiver connector.

(b) Disconnect the F9 ECU connector.

(c) 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.

7. CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - BATTERY AND BODY GROUND)

(a) Disconnect the O11 receiver connector.





(b) Measure the resistance and voltage according to the value(s) in the table below.

Standard Resistance:





Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

8. CHECK DOOR CONTROL RECEIVER (OUTPUT)

(a) Using an oscilloscope, check the waveform.





Measurement Condition





OK:

Waveform is output normally (refer to illustration).

NG -- REPLACE DOOR CONTROL RECEIVER Removal

OK -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal