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 (multiplex network body ECU). The main body ECU (multiplex network 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 or door control transmitter, 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 (Proceed to PROBLEM SYMPTOMS TABLE) Problem Symptoms Table
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 (Proceed to Key Reminder Buzzer does not Sound) Problem Symptoms Table
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 DOOR CONTROL TRANSMITTER (LED)

(a) Press and hold the lock switch of the door control transmitter for 5 seconds and check the number of times that the transmitter LED illuminates.

Result





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

B -- REPLACE DOOR CONTROL TRANSMITTER
A -- Continue to next step.

5. INSPECT TRANSMITTER BATTERY (VOLTAGE)

(a) Remove the battery from the door control transmitter that does not operate Transmitter Battery (w/o Smart Key System).





(b) Attach a lead wire (0.6 mm (0.0236 in.) in diameter or less 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.

(c) Carefully extend the lead wire out from the position shown in the illustration and install the previously removed transmitter battery.

NOTICE:
When replacing the transmitter battery, before starting work, remove any static electricity that has built up by touching, for example, the vehicle to prevent the door control transmitter module set from being damaged.

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

HINT
* Measure the transmitter battery voltage while pressing the lock or unlock switch on the transmitter.
* Perform the measurement when the door control transmitter is at room temperature.

Standard Voltage:





NG -- REPLACE DOOR CONTROL TRANSMITTER

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

6. CHECK FOR ELECTRICAL NOISE

(a) Move the door control 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 lock or unlock 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 it 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

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

(a) Disconnect the H18 door control receiver connector.

(b) Disconnect the C56 main body ECU (multiplex network body 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.

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

(a) Disconnect the H18 door control 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.

9. CHECK DOOR CONTROL RECEIVER (OUTPUT)

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





Standard Voltage:





Text in Illustration





NG -- REPLACE DOOR CONTROL RECEIVER Removal

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