Toyota Corolla Cross: Only Wireless Control Function is Inoperative

Toyota Corolla Cross (2022-2024) Service Manual / Vehicle Interior / Door Lock / Wireless Door Lock Control System (w/o Smart Key System) / Only Wireless Control Function is Inoperative

DESCRIPTION

The door control receiver receives signals from the door control transmitter assembly and sends these signals to the main body ECU (multiplex network body ECU). The main body ECU (multiplex network body ECU) then controls all doors by sending lock/unlock signals to each door, and sends hazard flasher signals to the combination meter assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing or inspecting the door control receiver and wire harness, do not change the position or length of the wire harness. If the wire harness is too close to the door control receiver, wireless function performance may be affected.
When replacing the door control receiver, read the transmitter IDs (tire pressure warning system) stored in the old ECU using the GTS and write them down before removal.
Click here
If the door control receiver has been replaced, it is necessary to perform initialization (Click here ) after registration (Click here ) of the transmitter IDs to the door control receiver assembly.
If the main body ECU (multiplex network body ECU) is replaced, refer to the Registration.
Click here

PROCEDURE

1.	CHECK POWER DOOR LOCK OPERATION

(a) Check the power door lock operation.

Click here

OK:

Locked doors unlock.

GO TO POWER DOOR LOCK CONTROL SYSTEM

2.	CHECK KEY REMINDER WARNING SYSTEM

(a) Check that the key reminder warning buzzer operates properly.

Click here

OK:

Key reminder warning buzzer operates properly.

GO TO KEY REMINDER WARNING SYSTEM

3.	CHECK DOOR CONTROL TRANSMITTER ASSEMBLY

(a) When a known good registered door control transmitter assembly is used, check that the wireless functions operate properly.

Result	Proceed to
Wireless door lock/unlock function operates properly with a known good door control transmitter assembly	A
Wireless door lock/unlock function does not operate	B

GO TO STEP 5

4.	CHECK TRANSMITTER BATTERY (VOLTAGE)

(a) Inspect the transmitter battery capacity.

Click here

REPLACE DOOR CONTROL TRANSMITTER ASSEMBLY

REPLACE TRANSMITTER BATTERY

5.	CHECK WAVE ENVIRONMENT

(a) Bring the door control transmitter assembly near the door control receiver, and perform wireless operation check.

HINT:

When the door control transmitter assembly 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 functions operate properly.

END (AFFECTED BY WAVE INTERFERENCE)

6.	SWITCH TO SELF-DIAGNOSTIC MODE

(a) Switch to self-diagnostic mode.

(1) Insert the key into the ignition key cylinder and remove it.

(2) Within 5 seconds after the key is removed, insert it into the ignition key cylinder and then turn the ignition switch ON then off 1 time. (End in off)

(3) Within 30 seconds of turning the ignition switch off, perform the following 9 times: Turn the ignition switch ON then off. (End in off)

HINT:

Turning the ignition switch ON after the procedure above has been completed will end the self-diagnostic mode.

CAUTION:

If the system fails to enter the self-diagnostic mode, the system will return to normal mode.

(b) Check that the system has switched to self-diagnostic mode by checking the interior light output pattern.

7.	CHECK SELF-DIAGNOSTIC MODE

(a) Check the diagnostic outputs when a door control transmitter assembly switch is pressed. The diagnostic outputs can be checked by the interior light patterns.

Result	Proceed to
Normal pattern (interior light output pattern) is output	A
Unmatching recognition code is output	B
No diagnostic output	C

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

GO TO STEP 12

8.	CHECK REGISTER RECOGNITION CODE

(a) Check that the system can be switched to rewrite mode or add mode, and that a recognition code can be registered.

Click here

OK:

Recognition code can be registered.

END (GO TO OPERATION CHECK)

9.	REPLACE DOOR CONTROL RECEIVER

(a) Temporarily replace the door control receiver with a new or known good one.

Click here

10.	REGISTER RECOGNITION CODE

(a) Perform the Registration procedure.

Click here

11.	CHECK DOOR CONTROL RECEIVER (OPERATION)

(a) Check that the doors can be locked and unlocked by the door control transmitter assembly lock and unlock switches.

OK:

Doors can be locked and unlocked by the door control transmitter assembly.

END (DOOR CONTROL RECEIVER WAS DEFECTIVE)

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

12.	CHECK DOOR CONTROL RECEIVER (RESPONSE)

(a) Prepare a door control transmitter assembly from another vehicle.

(b) Press and hold a door control transmitter assembly switch.

OK:

Unmatching recognition code is output.

REPLACE DOOR CONTROL TRANSMITTER ASSEMBLY

13.	CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - POWER SOURCE AND BODY GROUND)

(a) Disconnect the O221 door control receiver connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
O221-12 (GND) - Body ground	Always	Below 1 Ω

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
O221-7 (+B) - Body ground	Ignition switch off	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

14.	CHECK DOOR CONTROL RECEIVER (OUTPUT)

(a) Reconnect the door control receiver connector.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
O221-4 (RDA) - Body ground	Procedure: Remove key from ignition key cylinder Close all doors Press lock or unlock switch of door control transmitter assembly	11 to 14 V → pulse generation

*a	Component with harness connected (Door Control Receiver)

REPLACE DOOR CONTROL RECEIVER

15.	CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - DOOR CONTROL RECEIVER)

(a) Disconnect the I85 main body ECU (multiplex network body ECU) connector.

(b) Disconnect the O221 door control receiver connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
O221-4 (RDA) - I85-18 (RDA)	Always	Below 1 Ω
O221-5 (PRG) - I85-17 (PRG)	Always	Below 1 Ω
O221-4 (RDA) or I85-18 (RDA) - Other terminals and body ground	Always	10 kΩ or higher
O221-5 (PRG) or I85-17 (PRG) - Other terminals and body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

16.	REPLACE DOOR CONTROL RECEIVER

(a) Temporarily replace the door control receiver with a new or known good one.

Click here

17.	REGISTER RECOGNITION CODE

(a) Perform the Registration procedure.

Click here

18.	CHECK DOOR CONTROL RECEIVER (OPERATION)

(a) Check that the doors can be locked and unlocked by the door control transmitter assembly lock and unlock switches.

OK:

Doors can be locked and unlocked by the door control transmitter assembly.

END (DOOR CONTROL RECEIVER WAS DEFECTIVE)

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

SEE MORE:

Diagnosis System

DIAGNOSIS SYSTEM DESCRIPTION (a) Parking support brake system data and Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the GTS to check for malfunctions and to repair them. CHECK DLC3 (a) Chec

Inspection

INSPECTION PROCEDURE 1. INSPECT NO. 2 AIR FUEL RATIO SENSOR (a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition 1 (HA1B) - 2 (+B) 20°C (68°F) 2 to 6 Ω 1 (H

Toyota Corolla Cross: Only Wireless Control Function is Inoperative

READ NEXT:

No Answer-Back

Heating / Air Conditioning

Air Conditioning Amplifier

SEE MORE:

Diagnosis System

Inspection