Toyota Tundra Service Manual: Only Wireless Control Function is Inoperative

Toyota Tundra Service Manual / Vehicle Interior / Door Lock / Wireless Door Lock Control 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:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • 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 Techstream and write them down before removal.
  • It is necessary to perform initialization after registration of the transmitter IDs into the door control receiver if the door control receiver has been replaced.

    for Initialization:

    Click here

    for Registration:

    Click here

PROCEDURE

1.

CHECK POWER DOOR LOCK OPERATION

(a) Check the power door lock operation.

Click here

Locked doors do not unlock

GO TO POWER DOOR LOCK CONTROL SYSTEM

Locked doors unlock

2.

CHECK KEY REMINDER WARNING SYSTEM

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

Click here

Key reminder warning buzzer does not operates properly

GO TO KEY REMINDER WARNING SYSTEM

Key reminder warning buzzer operates properly

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.

Click here

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

B

GO TO STEP 5

A

4.

CHECK TRANSMITTER BATTERY (VOLTAGE)

(a) Remove the transmitter battery.

Click here

(b) Inspect the transmitter battery capacity.

Click here

OK

REPLACE DOOR CONTROL TRANSMITTER ASSEMBLY

NG

REPLACE TRANSMITTER BATTERY

5.

CHECK WAVE ENVIRONMENT

(a) Bring the door control transmitter assembly near the door control receiver, and perform a 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.
Wireless functions operate properly

END (AFFECTED BY WAVE INTERFERENCE)

Wireless functions do not operate properly

6.

SWITCH TO SELF-DIAGNOSTIC MODE

(a) Connect the Techstream to the DLC3.

(b) Turn the Ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Utility / Wireless Diagnosis Mode.

(e) Proceed to the next step in accordance with the prompts on the Techstream screen.

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

(g) Check that the system has switched to self-diagnostic mode by checking the wireless door lock buzzer output pattern.

NEXT

7.

CHECK SELF DIAGNOSTIC MODE

(a) Inspect the diagnostic outputs when the door control transmitter assembly switch is pressed. The diagnostic outputs can be checked by the flash patterns of the interior light and wireless door lock buzzer patterns.

Result

Proceed to

Normal wave (light flash pattern) is output (A).

A

Unmatching recognition code is output (B).

B

No diagnostic outputs (C).

C

A

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

C

GO TO STEP 9

B

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

Recognition code can be registered

END (GO TO OPERATION CHECK)

Recognition code cannot be registered

GO TO STEP 13

9.

CHECK DOOR CONTROL RECEIVER (RESPONSE)

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

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

(c) Check that an unmatching recognition code is output.

Unmatching recognition code is output

REPLACE DOOR CONTROL TRANSMITTER ASSEMBLY

Unmatching recognition code is not output

10.

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

(a) Disconnect the door control receiver connector.

*a

Front view of wire harness connector

(to Door control Receiver)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

P21-12 (GND) - Body ground

Always

Below 1 Ω

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

P21-7 (+B) - Body ground

Always

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

11.

CHECK DOOR CONTROL RECEIVER (OUTPUT)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

P21-4 (RDA) - Body ground

Ignition switch off, all doors closed and door control transmitter assembly switch not pressed

11 to 14 V

Ignition switch off, all doors closed and door control transmitter assembly switch pressed

Pulse generation

*a

Component with harness connected

(Door Control Receiver)

NG

REPLACE DOOR CONTROL RECEIVER

OK

12.

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - DOOR CONTROL RECEIVER)

(a) Disconnect the J165 main body ECU (multiplex network body ECU) connector.

(b) Disconnect the P21 door control receiver connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

P21-4 (RDA) - J165-4 (RDA)

Always

Below 1 Ω

P21-5 (PRG) - J165-5 (PRG)

Always

Below 1 Ω

P21-4 (RDA) or J165-4 (RDA) - Other terminals and body ground

Always

10 kΩ or higher

P21-5 (PRG) or J165-5 (PRG) - Other terminals and body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

13.

REPLACE DOOR CONTROL RECEIVER

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

  • for Double Cab:

    Click here

  • for CrewMax:

    Click here

NEXT

14.

CHECK REGISTER RECOGNITION CODE

(a) Perform the Registration procedure.

Click here

NEXT

15.

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.

OK

END (DOOR CONTROL RECEIVER WAS DEFECTIVE)

NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    No Answer-Back

    Operation Check

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